CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims the benefit of U.S. Provisional Application Serial

No. 63/330,082 filed on April 12, 2022, entitled Robotic Cleaner and Methods of Operating the same, which is fully incorporated herein by reference.

TECHNICAL FIELD

[0002] The present disclosure generally relates to surface cleaning apparatuses, and more particularly, to a robotic cleaner.

BACKGROUND INFORMATON

[0003] Robotic cleaners are configured to autonomously traverse a surface to be cleaned (e.g., a floor). For example, a robotic vacuum cleaner may include a suction motor configured to draw debris from the surface to be cleaned into a dust cup of the robotic vacuum cleaner for later disposal. In some instances, the robotic cleaner may include one or more side cleaning implements (e.g., one or more side brushes) configured to urge debris from outside a periphery of the robotic cleaner toward a movement path of the robotic cleaner. For example, one or more side brushes may improve a cleaning performance of the robotic cleaner when traveling adjacent a vertically extending surface (e.g., a wall).

BRIEF DESCRIPTION OF THE DRAWINGS

[0004] These and other features advantages will be better understood by reading the following detailed description, taken together with the drawings wherein:

[0005] FIG. 1 is a schematic top view of an example of a robotic cleaner, consistent with embodiments of the present disclosure.

[0006] FIG. 2 is a schematic side view of an example of the robotic cleaner of FIG. 1, consistent with embodiments of the present disclosure.

[0007] FIG. 3 is a schematic top view of an example of a robotic cleaner, consistent with embodiments of the present disclosure.

[0008] FIG. 4 is a schematic top view of an example of a robotic cleaner, consistent with embodiments of the present disclosure.

[0009] FIG. 5 is a schematic top view of an example of a robotic cleaner, consistent with embodiments of the present disclosure. [0010] FIG. 6A is a schematic example of a robotic cleaner traversing a vertically extending surface having a discontinuity, consistent with embodiments of the present disclosure.

[0011] FIG. 6B is a schematic example of the robotic cleaner of FIG. 6A traversing the vertically extending surface at a different point in time, consistent with embodiments of the present disclosure.

[0012] FIG. 6C is a schematic example of the robotic cleaner of FIG. 6A traversing the vertically extending surface at a different point in time, consistent with embodiments of the present disclosure.

[0013] FIG. 6D is a schematic example of the robotic cleaner of FIG. 6A traversing the vertically extending surface at a different point in time, consistent with embodiments of the present disclosure.

[0014] FIG. 6E is a schematic example of the robotic cleaner of FIG. 6A traversing the vertically extending surface at a different point in time, consistent with embodiments of the present disclosure.

[0015] FIG. 7 A is a schematic example of a robotic cleaner configured to traverse a comer region, consistent with embodiments of the present disclosure.

[0016] FIG. 7B is a schematic example of the robotic cleaner of FIG. 7 A at a different point in time, consistent with embodiments of the present disclosure.

[0017] FIG. 7C is a schematic example of the robotic cleaner of FIG. 7 A at a different point in time, consistent with embodiments of the present disclosure.

[0018] FIG. 7D is a schematic example of the robotic cleaner of FIG. 7A at a different point in time, consistent with embodiments of the present disclosure.

[0019] FIG. 7E is a schematic example of the robotic cleaner of FIG. 7 A at a different point in time, consistent with embodiments of the present disclosure.

[0020] FIG. 7F is a schematic example of the robotic cleaner of FIG. 7A at a different point in time, consistent with embodiments of the present disclosure.

[0021] FIG. 7G is a schematic example of the robotic cleaner of FIG. 7A at a different point in time, consistent with embodiments of the present disclosure.

[0022] FIG. 8A is a schematic example of a robotic cleaner configured to traverse a comer region, consistent with embodiments of the present disclosure. [0023] FIG. 8B is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0024] FIG. 8C is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0025] FIG. 8D is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0026] FIG. 8E is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0027] FIG. 8F is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0028] FIG. 8G is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0029] FIG. 8H is a schematic example of the robotic cleaner of FIG. 8A at a different point in time, consistent with embodiments of the present disclosure.

[0030] FIG. 9A is a schematic example of a robotic cleaner configured to traverse a comer region, consistent with embodiments of the present disclosure.

[0031] FIG. 9B is a schematic example of the robotic cleaner of FIG. 9A at a different point in time, consistent with embodiments of the present disclosure.

[0032] FIG. 9C is a schematic example of the robotic cleaner of FIG. 9A at a different point in time, consistent with embodiments of the present disclosure.

[0033] FIG. 9D is a schematic example of the robotic cleaner of FIG. 9A at a different point in time, consistent with embodiments of the present disclosure.

[0034] FIG. 9E is a schematic example of the robotic cleaner of FIG. 9A at a different point in time, consistent with embodiments of the present disclosure.

[0035] FIG. 10A is a schematic example of a robotic cleaner configured to traverse a comer region, consistent with embodiments of the present disclosure.

[0036] FIG. 10B is a schematic example of the robotic cleaner of FIG. 10 A at a different point in time, consistent with embodiments of the present disclosure.

[0037] FIG. 10C is a schematic example of the robotic cleaner of FIG. 10 A at a different point in time, consistent with embodiments of the present disclosure.

[0038] FIG. 10D is a schematic example of the robotic cleaner of FIG. 10A at a different point in time, consistent with embodiments of the present disclosure. [0039] FIG. 10E is a schematic example of the robotic cleaner of FIG. 10A at a different point in time, consistent with embodiments of the present disclosure.

[0040] FIG. 10F is a schematic example of the robotic cleaner of FIG. 10A at a different point in time, consistent with embodiments of the present disclosure.

[0041] FIG. 10G is a schematic example of the robotic cleaner of FIG. 10A at a different point in time, consistent with embodiments of the present disclosure.

[0042] FIG. 11 is a schematic example of a robotic cleaner having first and second side brushes, consistent with embodiments of the present disclosure.

[0043] FIG. 12 is a schematic example of the robotic cleaner of FIG. 11 configured to traverse a corner region, consistent with embodiments of the present disclosure.

[0044] FIG. 13 is a schematic example of the robotic cleaner of FIG. 12 at a different point in time, consistent with embodiments of the present disclosure.

[0045] FIG. 14 is a schematic example of the robotic cleaner of FIG. 12 at a different point in time, consistent with embodiments of the present disclosure.

[0046] FIG. 15 is a schematic example of the robotic cleaner of FIG. 12 at a different point in time, consistent with embodiments of the present disclosure.

DETAILED DESCRIPTION

[0047] The present disclosure is generally directed to a robotic cleaner. The robotic cleaner may include one or more driven wheels configured to urge the robotic cleaner along a surface to be cleaned (e.g., a floor), one or more sensors configured to detect a feature of an environment, and an air jet assembly configured to generate an air jet. The air jet assembly can be caused to selectively generate an air jet based, at least in part, on outputs generated by the one or more sensors. For example, the air jet assembly can be caused to generate the air jet in response to the one or more sensors indicating a presence of a vertically extending surface (e.g., a wall). By way of further example, the air jet assembly can be caused to selectively generate the air jet as the robotic cleaner traverses an intersection of vertically extending surfaces (e.g., a comer formed at an intersection of two walls). In some instances, the robotic cleaner may further include a side brush, wherein an operational state of the side brush corresponds to an operational state of the air jet assembly. For example, the operational state of the side brush may correspond to an operational state of the air jet assembly during a wallfollowing and/or corner traversal behavior. [0048] FIG. 1 shows a schematic example of a robotic cleaner 100. As shown, the robotic cleaner 100 includes a body 102 having an agitator chamber 104 (shown in hidden lines) that is configured to receive one or more agitators 106 (shown in hidden lines) and one or more driven wheels 108 (shown in hidden lines) configured to urge the robotic cleaner 100 across a surface to be cleaned 110 (e.g., a floor). In some instances, the robotic cleaner 100 may include a side brush 101 (shown in hidden lines) configured to rotate about a rotation axis that extends transverse to (e.g., perpendicular to) the surface to be cleaned 110. A suction motor 1 12 (shown in hidden lines) is fluidly coupled to the agitator chamber 104 and configured to urge air to flow into the agitator chamber 104. A dust cup 114 (shown in hidden lines) may be fluidly coupled to the suction motor 112 and the agitator chamber 104 such that at least a portion of debris entrained within air flowing into the agitator chamber 104 is deposited in the dust cup 114. In other words, the suction motor 112 is fluidly coupled to the agitator chamber 104 and the dust cup 114. An exhaust side of the suction motor 112 can be fluidly coupled to one or more air jet assemblies 116. Additionally, or alternatively, a fan assembly may be included in the robotic cleaner 100, wherein the fan assembly may be fluidly coupled to the one or more air jet assemblies 116 to generate an air jet. At least one of the one or more air jet assemblies 116 and at least one of the one or more side brushes 101 may be disposed on a common side (or on opposing sides) of the robotic cleaner 100.

[0049] As shown, at least a portion of the one or more air jet assemblies 116 can be disposed along a peripheral edge 118 of the body 102. The one or more air jet assemblies 116 can be positioned along the peripheral edge 118 such that an air jet 119 generated by the air jet assembly 116 extends in a direction outwardly from the body 102 (e.g., radially outwardly when the body 102 has a generally circular cross-section). Additionally, or alternatively, the one or more air jet assemblies 116 can be configured such that the air jet 119 generated by the air jet assembly 116 extends in a downward direction toward the surface to be cleaned 110. For example, the air jet 119 generated by the one or more air jet assemblies 116 may extend outwardly from the body 102 and in a direction of the surface to be cleaned 110. In this example, and as shown in FIG. 2, when the robotic cleaner 100 travels along a vertical surface 200 (e.g., a wall) extending from the surface to be cleaned 110, the air jet 119 may intersect with the vertical surface 200 before intersecting the surface to be cleaned 110. Such a configuration may result in the formation of a vortex between the body 102, the vertical surface 200, and the surface to be cleaned 110, which may improve debris agitation. Additionally, or alternatively, the one or more air jet assemblies 116 can be configured such that the air jet 119 extends forwardly (relative to a forward direction of movement of the robotic cleaner 100).

[0050] The one or more air jet assemblies 116 may be positioned along the peripheral edge 118 at a location that minimizes a separation distance 202 between the one or more air jet assemblies 116 and the vertical surface 200 when the robotic cleaner 100 is traveling along the vertical surface 200. For example, the one or more air jet assemblies 116 may be disposed along an assembly axis 120. The assembly axis 120 extends transverse to (e.g., perpendicular to) a forward direction of movement 122 of the robotic cleaner 100 and extends along a widest width 124 of the body 102, the widest width 124 extends in a direction transverse to (e.g., perpendicular to) the forward direction of movement 122. In some instances, the one or more air jet assemblies 116 may be positioned forward and/or rearward of the widest width 124. In some instances, the separation distance 202 may be, for example, in a range of 0.5 centimeter (cm) to 1.5 cm. By way of further example, the separation distance 202 may be about (e.g., within 1%, 2%, 3%, 4%, or 5% of) 1 cm.

[0051] FIG. 3 shows a schematic example of a robotic cleaner 300, which is an example of the robotic cleaner 100 of FIG. 1. As shown, the robotic cleaner 300 includes a body 302 having an agitator chamber 304 (shown in hidden lines) that is configured to receive one or more agitators 306 (shown in hidden lines) and one or more driven wheels 308 (shown in hidden lines) configured to urge the robotic cleaner 300 across a surface to be cleaned 310 (e.g., a floor). In some instances, the robotic cleaner 300 may include a side brush 301 (shown in hidden lines) configured to rotate about a rotation axis that extends transverse to (e.g., perpendicular to) the surface to be cleaned 310. A suction motor 312 (shown in hidden lines) is fluidly coupled to the agitator chamber 304 and configured to urge air to flow into the agitator chamber 304. A dust cup 314 (shown in hidden lines) may be fluidly coupled to the suction motor 312 and the agitator chamber 304 such that at least a portion of debris entrained within air flowing into the agitator chamber 304 is deposited in the dust cup 314. One or more air jet assemblies 316 (shown in hidden lines) may be disposed at a peripheral edge 318 of the body 302 of the robotic cleaner 300.

[0052] The one or more air jet assemblies 316 are fluidly coupled to a fan 320 (shown in hidden lines). The fan 320 is configured to cause air to flow through the one or more air jet assemblies 316, forming an air jet. The fan 320 may be communicatively coupled to a controller 322 (shown in hidden lines) of the robotic cleaner 300. The controller 322 may be configured to adjust an operation of the fan 320. For example, the controller 322 may adjust the operation of the fan 320 based, at least in part, on outputs generated by one or more sensors 324 (shown in hidden lines) configured to detect one or more features within an environment (e.g., proximity of a vertical surface such as a wall and/or a quantity and/or size of debris adjacent a vertical surface).

[0053] Adjusting operation of the fan 320 may include enabling and disabling the fan 320, changing the fan speed, and/or any other operational adjustment. For example, the controller 322 may be configured to enable the fan 320 in response to at least one of the one or more sensors 324 detecting the presence of a vertical surface (e.g., a wall) and to disable the fan 320 in response to the one or more sensors 324 not detecting the vertical surface. As such, an air jet may be generated when the robotic cleaner 300 detects (e.g., is following) a vertically extending surface but not when traversing a central portion of an area and/or a virtual barrier (e.g., virtual wall), potentially reducing power consumption. By way of further example, the controller 322 may cause the fan 320 to operate at higher speeds with increasing distance from a vertical surface and/or based on a quantity of detected debris adjacent the vertical surface (e.g., when the one or more sensors 324 includes a debris detection sensor). By way of still further example, a user of the robotic cleaner 300 may adjust the operation of the fan 320 manually (e.g., using an interface on the robotic cleaner 300 and/or through an application on a computing device such as a mobile phone or tablet). In this example, a user may select between a plurality of different fan speeds (e.g., at least 3 fan speeds) such as, for example, a high, medium, and low fan speed. Additionally, or alternatively, the user may select an automatic fan speed. The automatic fan speed may be determined by the controller 322 of the robotic cleaner 300 using, for example, the one or more sensors 324. The user may also cause the fan 320 to be disabled. In some instances, the user may indicate areas (e.g., rooms and/or regions within rooms) in which the fan 320 is to be disabled (e.g., using a map of the environment displayed on a device such as a mobile phone).

[0054] FIG. 4 shows a schematic example of the robotic cleaner 300, wherein the fan 320 and suction motor 312 cooperate to urge air into the one or more air jet assemblies 316. As shown, a suction motor exhaust 400 of the suction motor 312 and a fan exhaust 402 of the fan 320 is fluidly coupled to a duct 404 (shown in hidden lines) of at least one of the one or more air jet assemblies 316. The duct 404 fluidly couples the suction motor 312 and fan 320 to a nozzle 401 of at least one of the one or more air jet assemblies 316. The duct 404 may, in some instances, be at least partially (e.g., entirely) formed from a body of the robotic cleaner 300. Alternatively, the duct 404 may be a separate component that couples to a body of the robotic cleaner 300.

[0055] In operation, the controller 322 may be configured to selectively enable/disable to the fan 320 to adjust a velocity of the generated air jet. When the fan 320 is disabled, a baseline air jet may be generated using only the exhaust of the suction motor 312. In some instances, the baseline air jet may be disabled by fluidly decoupling the suction motor 312 from the nozzle 401 (e.g., using one or more valves). When the fan 320 is enabled, the suction motor 312 and the fan 320 may cooperate to form an augmented air jet, the augmented air jet may have a velocity that is greater than that of the baseline air jet. The velocity of the augmented air jet may be adjusted by adjusting a speed of the fan 320. For example, the controller 322 may adjust a fan speed based, at least in part, on a user input and/or using the one or more sensors 324. The fan 320 may be generally described as having a plurality of non- zero speeds (e.g., at least three non-zero fan speeds). In some instances, the fan speed may be varied (e.g., continuously) such that a pulsed air jet is formed.

[0056] FIG. 5 shows a schematic example of the robotic cleaner 300, wherein the fan 320 and suction motor 312 do not cooperate to urge air into the one or more air jet assemblies 316. As shown, a first duct 500 of the air jet assembly 316 fluidly couples the fan exhaust 402 of the fan 320 to at least one nozzle 501 of at least one of the one or more air jet assemblies 316 and a second duct 502 fluidly couples the suction motor exhaust 400 to an exhaust port and/or another nozzle 501 of another one of the one or more air jet assemblies 316. Such a configuration may allow at least one of the one or more air jet assemblies 316 to be positioned without considering proximity of the air jet assembly 316 to the suction motor 312. The ducts 500 and/or 502 may, in some instances, be at least partially (e.g., entirely) formed from a body of the robotic cleaner 300. Alternatively, one or more of the ducts 500 and/or 502 may be a separate component that couples to a body of the robotic cleaner 300.

[0057] In operation, the controller 322 may be configured to selectively enable/disable the fan 320 and/or to adjust a fan speed of the fan 320 in order to adjust a velocity of the generated air jet. When the fan 320 is disabled, the air jet assembly 316 fluidly coupled to the fan 320 does not generate an air jet. When the fan 320 is enabled, air is caused to flow through the air jet assembly 316 fluidly coupled to the fan 320. A speed of the fan 320 may be adjusted to adjust a velocity of the generated air jet. The fan 320 may be generally described as having a plurality of non-zero fan speeds (e.g., at least three non-zero fan speeds). In some instances, the fan speed may be varied (e.g., continuously) such that a pulsed air jet is formed.

[0058] FIGS. 6A-6E show a schematic example of a robotic cleaner 600 carrying out a method of following a vertically extending surface 602 (e.g., a wall) having a discontinuity 604. One or more steps of the method shown in FIGS. 6A-6E may be embodied as one or more instructions stored in one or more memories 126 of FIG. 1 (e.g., one or more non- transitory memories), wherein the one or more instructions are configured to be executed on one or more processors 128 of FIG. 1 . For example, a controller 130 of FIG. 1 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit).

[0059] The robotic cleaner 600 is an example of the robotic cleaner 100 of FIG. 1. The discontinuity 604 may be a gap between two adjacent vertical surfaces (e.g., a doorway), a recessed region where the robotic cleaner cannot traverse (e.g., a toe kick of a cabinet or the space between a piece of furniture and a floor), a drop off, and/or any other type of discontinuity. In some instances, the robotic cleaner 600 may include one or more side brushes (e.g., the side brush 101 of FIG. 1). At least one side brush may be on the same side of the robotic cleaner 600 as the air jet assembly configured to generate an air jet 606. At least one side brush may be configured to be enabled when the air jet assembly is generating the air jet 606 and disabled when the air jet assembly is not generating the air jet 606. In other words, an operational state of at least one side brush (e.g., on or off) may correspond to an operational state of the air jet assembly (e.g., air jet being generated or air jet not being generated).

[0060] With reference to FIG. 6A, the robotic cleaner 600 is configured to generate the air jet 606 when following the vertically extending surface 602. When following the vertically extending surface 602, the robotic cleaner 600 may be configured to determine an approach separation distance 608 that extends between the robotic cleaner 600 (e.g., a forward most portion) and a first side 601 of the discontinuity 604. The robotic cleaner 600 may be configured to determine the approach separation distance 608 using a map of the environment. Additionally, or alternatively, the robotic cleaner 600 may have one or more sensors configured to detect the first side 601 of the discontinuity 604. When the approach separation distance 608 is greater than an approach threshold, the robotic cleaner 600 is configured to generate the air jet 606. [0061] With reference to FIG. 6B, when the approach separation distance 608 is less than or equal to the approach threshold, the robotic cleaner 600 discontinues generating the air jet 606. Discontinuing generation of the air jet 606 may reduce or prevent debris from being urged into the discontinuity 604 of the vertically extending surface 602. As such, the approach threshold may be based, at least in part, on the average distance debris is moved by the air jet 606. For example, the approach threshold may be in a range of 5 millimeters (mm) to 30 mm. By way of further example, the approach threshold may be in a range of 8 mm to 22 mm. By way of still further example, the approach threshold may be about (e.g., within 1 %, 2%, 3%, 4%, or 5% of) 10 mm or about 20 mm. By way of still further example, the approach threshold may be in a range of 2% of the widest width of the robotic cleaner 600 to 10% of the widest width of the robotic cleaner 600.

[0062] With reference to FIG. 6C, as the robotic cleaner 600 travels across the discontinuity 604, the robotic cleaner 600 is configured to determine a departure separation distance 610. The departure separation distance 610 extends from the robotic cleaner 600 (e.g., a forward most portion) to a second side 603 of the discontinuity 604, the second side 603 of the discontinuity 604 being opposite the first side 601 of the discontinuity 604. The robotic cleaner 600 may be configured to determine the departure separation distance 610 using a map of the environment. Additionally, or alternatively, the robotic cleaner 600 may have one or more sensors configured to detect the second side 603 of the discontinuity 604, wherein the departure separation distance 610 may be determined using the one or more sensors. Generation of the air jet 606 may remain disabled until the departure separation distance 610 is less than or equal to a departure threshold.

[0063] With reference to FIG. 6D, when the departure separation distance 610 is less than or equal to the departure threshold, the robotic cleaner 600 resumes generating the air jet 606. Resuming generation of the air jet 606, when at least a portion of the robotic cleaner 600 is still traversing the discontinuity 604, may allow debris proximate the second side 603 of the discontinuity to be urged into a movement path of the robotic cleaner 600. As such, the departure threshold may be based, at least in part, on the average distance debris is moved by the air jet 606 and/or a time for the air jet 606 to reach a desired velocity. For example, the departure threshold may be in a range of 1 mm to 10 mm. By way of further example, the departure threshold may be in a range of 40 mm to 60 mm. By way of still further example, the departure threshold may be about 5 mm or about 50 mm. By way of still further example, the departure threshold may be in a range of 1% of the widest width of the robotic cleaner 600 to 20% of the widest width of the robotic cleaner 600.

[0064] With reference to FIG. 6E, after traversing the discontinuity 604, the robotic cleaner 600 may resuming traversing the vertically extending surface 602 while generating the air jet 606.

[0065] FIGS. 7A-7G show a schematic example of a robotic cleaner 700 carrying out a method cleaning an intersection of two vertically extending surfaces (e.g., a comer region formed at an intersection of two walls). One or more steps of the method shown in FIGS. 7A- 7G may be embodied as one or more instructions stored in one or more memories 126 of FIG. 1 (e.g., one or more non-transitory memories), wherein the one or more instructions are configured to be executed on one or more processors of FIG. 1. For example, a controller 130 of FIG. 1 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit). [0066] The robotic cleaner 700 is an example of the robotic cleaner 100 and may include an air jet assembly 702 (shown in hidden lines) configured to selectively generate an air jet 704. As shown, the robotic cleaner 700 may be configured to follow a first vertically extending surface 706 that intersects with a second vertically extending surface 708 (e.g., at a perpendicular or non-perpendicular angle). The intersection of the first and second vertically extending surfaces 706 and 708 may be generally referred to as a comer region 710. In some instances, the robotic cleaner 700 may include one or more side brushes (e.g., the side brush 101 of FIG. 1). At least one side brush may be on the same side of the robotic cleaner 700 as the air jet assembly 702. At least one side brush may be configured to be enabled when the air jet assembly 702 is generating the air jet 704 and disabled when the air jet assembly 702 is not generating the air jet 704. In other words, an operational state of at least one side brush (e.g., on or off) may correspond to an operational state of the air jet assembly 702 (e.g., air jet being generated or air jet not being generated).

[0067] With reference to FIG. 7A, the robotic cleaner 700 is configured to follow the first vertically extending surface 706, while generating the air jet 704. As shown, while following the first vertically extending surface 706 according to a forward direction of movement 701, the robotic cleaner 700 approaches the second vertically extending surface 708, decreasing a second surface separation distance 703 that extends between the robotic cleaner

700 (e.g., a forward most portion) and the second vertically extending surface 708.

[0068] With reference to FIG. 7B, the robotic cleaner 700 is configured to discontinue moving in the forward direction of movement 701 in response to the second surface separation distance 703 being less than or equal to a second surface threshold. For example, the robotic cleaner 700 may include a displaceable bumper that is configured to move, actuating one or more sensors, in response to the displaceable bumper engaging (e.g., contacting) the second vertically extending surface 708. In response to the displaceable bumper being displaced, the robotic cleaner 700 may be configured to determine that the second surface separation distance 703 is less than or equal to the second surface threshold. Additionally, or alternatively, the robotic cleaner 700 may include one or more distance sensors configured to measure a distance to the second vertically extending surface 708. When the robotic cleaner 700 includes one or more distance sensors, the robotic cleaner 700 may not contact the second vertically extending surface 708.

[0069] With reference to FIG. 7C, when the second surface separation distance 703 is less than or equal to the second surface threshold, the robotic cleaner 700 is configured to disable generation of the air jet 704. In some instances, the robotic cleaner 700 may be further configured to move in a rearward direction of movement 712 for a predetermined rearward movement distance. For example, the robotic cleaner 700 may be caused to move in the rearward direction of movement 712 when the second surface separation distance 703 is insufficient to enable the robotic cleaner 700 to rotate without the robotic cleaner 700 engaging the second vertically extending surface 708. Such a configuration may prevent or mitigate a risk of the robotic cleaner 700 damaging the second vertically extending surface 708.

[0070] With reference to FIG. 7D, while generation of the air jet 704 is discontinued, the robotic cleaner 700 may be caused to rotate in a first rotation direction 714. Rotation in the first rotation direction 714 is configured to cause the forward direction of movement 701 to initially move towards the corner region 710. For example, the robotic cleaner 700 may be caused to rotate in the first rotation direction 714 until the forward direction of movement 701 intersects the comer region 710. By way of further example, the robotic cleaner 700 may be caused to rotate in the first rotation direction 714 such that the forward direction of movement

701 intersects the first vertically extending surface 706. By way of still further example, the robotic cleaner 700 may rotate in the first rotation direction 714 for a rotation angle of about (e.g., within 1%, 2%, 3%, 4%, or 5% of) 30°.

[0071] With reference to FIG. 7E, in response to completing rotation in the first rotation direction 714, the robotic cleaner 700 may be caused to generate the air jet 704 and to move in the forward direction of movement 701. For example, the robotic cleaner 700 may be caused to move in the forward direction of movement 701 until the robotic cleaner 700 engages with the first and the second vertically extending surfaces 706 and 708. In response to engaging with the first and second vertically extending surfaces 706 and 708, the robotic cleaner 700 may be caused to move in the rearward direction of movement 712 until the robotic cleaner 700 comes out of engagement with the first and second vertically extending surfaces 706 and 708.

[0072] With reference to FIG. 7F, in response to the robotic cleaner 700 coming out of engagement with the first and second vertically extending surfaces 706 and 708, the robotic cleaner 700 is caused to rotate in a second rotation direction 716 while generating the air jet 704, the second rotation direction 716 being opposite the first rotation direction 714. For example, the robotic cleaner 700 may rotate in the second rotation direction 716 until the forward direction of movement 701 is substantially parallel with the second vertically extending surface 708.

[0073] With reference to FIG. 7G, after rotating in the second rotation direction 716, the robotic cleaner 700 is caused to follow the second vertically extending surface 708 while generating the air jet 704.

[0074] FIGS. 8A-8H show a schematic example of a robotic cleaner 800 carrying out a method cleaning an intersection of two vertically extending surfaces (e.g., a comer region formed at an intersection of two walls). One or more steps of the method shown in FIGS. SASH may be embodied as one or more instructions stored in one or more memories 126 of FIG. 1 (e.g., one or more non-transitory memories), wherein the one or more instructions are configured to be executed on one or more processors 128 of FIG. 1. For example, the controller 130 of FIG. 1 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit). [0075] The robotic cleaner 800 is an example of the robotic cleaner 100 and may include an air jet assembly 802 (shown in hidden lines) configured to selectively generate an air jet 804. As shown, the robotic cleaner 800 may be configured to follow a first vertically extending surface 806 that intersects with a second vertically extending surface 808 (e.g., at a perpendicular or non-perpendicular angle). The intersection of the first and second vertically extending surfaces 806 and 808 may be generally referred to as a comer region 810. In some instances, the robotic cleaner 800 may include one or more side brushes (e.g., the side brush 101 of FIG. 1). At least one side brush may be on the same side of the robotic cleaner 800 as the air jet assembly 802. At least one side brush may be configured to be enabled when the air jet assembly 802 is generating the air jet 804 and disabled when the air jet assembly 802 is not generating the air jet 804. In other words, an operational state of at least one side brush (e.g., on or off) may correspond to an operational state of the air jet assembly 802 (e.g., air jet being generated or air jet not being generated).

[0076] With reference to FIG. 8A, the robotic cleaner 800 is configured to follow the first vertically extending surface 806 while generating the air jet 804. As shown, while following the first vertically extending surface 806 according to a forward direction of movement 801, the robotic cleaner 800 approaches the second vertically extending surface 808, decreasing a second surface separation distance 803 that extends between the robotic cleaner 800 (e.g., a forward most portion) and the second vertically extending surface 808.

[0077] With reference to FIG. 8B, the robotic cleaner 800 is configured, while generating the air jet 804, to discontinue moving in the forward direction of movement 801 in response to the second surface separation distance 803 being less than or equal to a second surface threshold. For example, the robotic cleaner 800 may include a displaceable bumper that is configured to move, actuating one or more sensors, in response to the displaceable bumper engaging (e.g., contacting) the second vertically extending surface 808. In response to the displaceable bumper being displaced, the robotic cleaner 800 may be configured to determine that the second surface separation distance 803 is less than or equal to the second surface threshold. Additionally, or alternatively, the robotic cleaner 800 may include one or more distance sensors configured to measure a distance to the second vertically extending surface 808. When the robotic cleaner 800 includes one or more distance sensors, the robotic cleaner 800 may not contact the second vertically extending surface 808.

[0078] With reference to FIG. 8C, the robotic cleaner 800 may be caused to move in a rearward direction of movement 812 for a predetermined rearward movement distance while generating the air jet 804. For example, the robotic cleaner 800 may be caused to move in the rearward direction of movement 812 when the second surface separation distance 803 is insufficient to enable to robotic cleaner 800 to rotate without the robotic cleaner 800 engaging the second vertically extending surface 808. Such a configuration may prevent or mitigate a risk of the robotic cleaner 800 damaging the second vertically extending surface 808.

[0079] With reference to FIG. 8D, the robotic cleaner 800 is caused to rotate in a first rotation direction 814 such that the air jet 804 moves along the second vertically extending surface 808 and the forward direction of movement 801 moves away from the comer region 810. For example, the robotic cleaner 800 may be configured to rotate in the first rotation direction 814 such that the forward direction of movement 801 moves away from the first vertically extending surface 806 until the forward direction of movement 801 extends substantially parallel to the second vertically extending surface 808. By way of further example, the robotic cleaner 800 may be configured to rotate in the first rotation direction 814 for a rotation angle of about 90°.

[0080] With reference to FIG. 8E, in response to completing rotation in the first rotation direction 814, the robotic cleaner 800 may disable generation of the air jet 804 and rotate in a second rotation direction 816, the second rotation direction 816 being opposite the first rotation direction 814. Rotating in the second rotation direction 816 is configured to cause the forward direction of movement 801 to move towards the comer region 810. For example, the robotic cleaner 800 may be caused to rotate in the second rotation direction 816 until the forward direction of movement 801 intersects the comer region 810. By way of further example, the robotic cleaner 800 may be caused to rotate in the second rotation direction 816 such that the forward direction of movement 801 intersects the first vertically extending surface 806. By way of still further example, the robotic cleaner 800 may rotate in the second rotation direction 816 for a rotation angle of about 120°.

[0081] With reference to FIG. 8F, after completing rotation in the second rotation direction, the robotic cleaner 800 may be caused to move in the forward direction of movement 801 until the robotic cleaner 800 engages the first and second vertically extending surface 806 and 808 while generating the air jet 804. In response to the robotic cleaner 800 engaging the first and second vertically extending surfaces 806 and 808, the robotic cleaner 800 may be caused to move in the rearward direction of movement 812. The robotic cleaner 800 may be caused to move in the rearward direction of movement 812 until the robotic cleaner 800 comes out of engagement with the first and second vertically extending surfaces 806 and 808. [0082] With reference to FIG. 8G, in response to the robotic cleaner 800 coming out of engagement with the first and second vertically extending surfaces 806 and 808, the robotic cleaner 800 is caused to rotate in the first rotation direction 814 while generating the air jet 804. For example, robotic cleaner 800 may rotate in the first rotation direction 814 until the forward direction of movement 801 is substantially parallel to the second vertically extending surface 808. By way of further example, the robotic cleaner 800 may rotate in the first rotation direction 814 for a rotation angle of about 120°.

[0083] With reference to FIG. 8H, after rotating in the first rotation direction 814 for the second time, the robotic cleaner 800 is caused to follow the second vertically extending surface 808 while generating the air jet 804.

[0084] FIGS. 9A-9E show a schematic example of a robotic cleaner 900 carrying out a method cleaning an intersection of two vertically extending surfaces (e.g., a corner region formed at an intersection of two walls). One or more steps of the method shown in FIGS. 9A- 9E may be embodied as one or more instructions stored in one or more memories 126 of FIG. 1 (e.g., one or more non-transitory memories), wherein the one or more instructions are configured to be executed on one or more processors 128 of FIG. 1. For example, the controller 130 of FIG. 1 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit). [0085] The robotic cleaner 900 is an example of the robotic cleaner 100 and may include an air jet assembly 902 (shown in hidden lines) configured to selectively generate an air jet 904. As shown, the robotic cleaner 900 may be configured to follow a first vertically extending surface 906 that intersects with a second vertically extending surface 908 (e.g., at a perpendicular or a non-perpendicular angle). The intersection of the first and second vertically extending surfaces 906 and 908 may be generally referred to as a comer region 910. In some instances, the robotic cleaner 900 may include one or more side brushes (e.g., the side brush 101 of FIG. 1). At least one side brush may be on the same side of the robotic cleaner 900 as the air jet assembly 902. At least one side brush may be configured to be enabled when the air jet assembly 902 is generating the air jet 904 and disabled when the air jet assembly 902 is not generating the air jet 904. In other words, an operational state of at least one side brush (e.g., on or off) may correspond to an operational state of the air jet assembly 902 (e.g., air jet being generated or air jet not being generated). [0086] With reference to FIG. 9A, the robotic cleaner 900 is configured to follow the first vertically extending surface 906 while generating the air jet 904. As shown, while following the first vertically extending surface 906 according to a forward direction of movement 901, the robotic cleaner 900 approaches the second vertically extending surface 908, decreasing a second surface separation distance 903 that extends between the robotic cleaner 900 (e.g., a forward most portion) and the second vertically extending surface 908.

[0087] With reference to FIG. 9B, the robotic cleaner 900, while generating the air jet 904, is configured to discontinue moving in the forward direction of movement 901 in response to the second surface separation distance 903 being less than or equal to a second surface threshold. For example, the robotic cleaner 900 may include a displaceable bumper that is configured to move, actuating one or more sensors, in response to the displaceable bumper engaging (e.g., contacting) the second vertically extending surface 908. In response to the displaceable bumper being displaced, the robotic cleaner 900 may be configured to determine that the second surface separation distance 903 is less than or equal to the second surface threshold. Additionally, or alternatively, the robotic cleaner 900 may include one or more distance sensors configured to measure a distance to the second vertically extending surface 908. When the robotic cleaner 900 includes one or more distance sensors, the robotic cleaner 900 may not contact the second vertically extending surface 908.

[0088] With reference to FIG. 9C, the robotic cleaner 900 may be caused to move in a rearward direction of movement 912 for a predetermined rearward movement distance while generating the air jet 904. For example, the robotic cleaner 900 may be caused to move in the rearward direction of movement 912 when the second surface separation distance 903 is insufficient to enable the robotic cleaner 900 to rotate without the robotic cleaner 900 engaging the second vertically extending surface 908. Such a configuration may prevent or mitigate a risk of the robotic cleaner 900 damaging the second vertically extending surface 908.

[0089] With reference to FIG. 9D, the robotic cleaner 900 is caused to rotate in a first rotation direction 914 while generating the air jet 904. The robotic cleaner 900 rotates in the first rotation direction 914 for at least a complete rotation (e.g., rotates for a rotation angle of at least 360°). For example, the robotic cleaner 900 may rotate in the first rotation direction 914 for more than a complete rotation such that the forward direction of movement 901 extends substantially parallel to the second vertically extending surface 908. By way of further example, the robotic cleaner 900 may rotate in the first rotation direction 914 for about 450° such that the forward direction of movement 901 extends substantially parallel to the second vertically extending surface 908.

[0090] With reference to FIG. 9E, in response to the robotic cleaner 900 completing rotation in the first rotation direction 914, the robotic cleaner 900 may be configured to move according to the forward direction of movement 901 while generating the air jet 904, following the second vertically extending surface 908.

[0091] FIGS. 10A-10G show a schematic example of a robotic cleaner 1000 carrying out a method of cleaning an intersection of two vertically extending surfaces (e.g., a comer region formed at an intersection of two walls). One or more steps of the method shown in FIGS. 10A-10G may be embodied as one or more instructions stored in one or more memories 126 of FIG. 1 (e.g., one or more non-transitory memories), wherein the one or more instructions are configured to be executed on one or more processors 128 of FIG. 1. For example, the controller 130 of FIG. 1 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit).

[0092] The robotic cleaner 1000 is an example of the robotic cleaner 100 and may include an air jet assembly 1002 (shown in hidden lines) configured to selectively generate an air jet 1004. As shown, the robotic cleaner 1000 may be configured to follow a first vertically extending surface 1006 that intersects with a second vertically extending surface 1008 (e.g., at a perpendicular or non-perpendicular angle). The intersection of the first and second vertically extending surfaces 1006 and 1008 may be generally referred to as a corner region 1010. In some instances, the robotic cleaner 1000 may include one or more side brushes (e.g., the side brush 101 of FIG. 1). At least one side brush may be on the same side of the robotic cleaner 1000 as the air jet assembly 1002. At least one side brush may be configured to be enabled when the air jet assembly 1002 is generating the air jet 1004 and disabled when the air jet assembly 1002 is not generating the air jet 1004. In other words, an operational state of at least one side brush (e.g., on or off) may correspond to an operational state of the air jet assembly 1002 (e.g., air jet being generated or air jet not being generated).

[0093] With reference to FIG. 10A, the robotic cleaner 1000 is configured to follow the first vertically extending surface 1006 while generating the air jet 1004. As shown, while following the first vertically extending surface 1006 according to a forward direction of movement 1001, the robotic cleaner 1000 approaches the second vertically extending surface 1008, decreasing a second surface separation distance 1003 that extends between the robotic cleaner 1000 (e.g., a forward most portion) and the second vertically extending surface 1008. [0094] With reference to FIG. 10B, the robotic cleaner 1000, while generating the air jet 1004, is configured to discontinue moving in the forward direction of movement 1001 in response to the second surface separation distance 1003 being less than or equal to a second surface threshold. For example, the robotic cleaner 1000 may include a displaceable bumper that is configured to move, actuating one or more sensors, in response to the displaceable bumper engaging (e.g., contacting) the second vertically extending surface 1008. In response to the displaceable bumper being displaced, the robotic cleaner 1000 may be configured to determine that the second surface separation distance 1003 is less than or equal to the second surface threshold. Additionally, or alternatively, the robotic cleaner 1000 may include one or more distance sensors configured to measure a distance to the second vertically extending surface 1008. When the robotic cleaner 1000 includes one or more distance sensors, the robotic cleaner 1000 may not contact the second vertically extending surface 1008.

[0095] With reference to FIG. 10C, the robotic cleaner 1000, while generating the air jet 1004, may be caused to move in a rearward direction of movement 1012 for a predetermined rearward movement distance. For example, the robotic cleaner 1000 may be caused to move in the rearward direction of movement 1012 when the second surface separation distance 1003 is insufficient to enable to the robotic cleaner 1000 to rotate without the robotic cleaner 1000 engaging the second vertically extending surface 1008. Such a configuration may prevent or mitigate a risk of the robotic cleaner 1000 damaging the second vertically extending surface 1008.

[0096] With reference to FIG. 10D, the robotic cleaner 1000 may be caused to rotate, while generating the air jet 1004 in a first rotation direction 1014. Rotation in the first rotation direction 1014 is configured to cause the forward direction of movement 1001 to initially move away from the comer region 1010, wherein continued rotation in the first rotation direction 1014 results in the forward direction of movement 1001 moving toward the corner region 1010. For example, the robotic cleaner 1000 may be caused to rotate in the first rotation direction 1014 until the forward direction of movement 1001 intersects the corner region 1010. By way of further example, the robotic cleaner 1000 may be caused to rotate in the first rotation direction 1014 such that the forward direction of movement 1001 intersects the first or second vertically extending surface 1006 or 1008. By way of still further example, the robotic cleaner 1000 may rotate in the first rotation direction 1014 for a rotation angle of about 330°. By way of still further example, the robotic cleaner 1000 may rotate in the first rotation direction 1014 for a rotation angle of about 315°.

[0097] With reference to FIG. 10E, in response to completing rotation in the first rotation direction 1014, the robotic cleaner 1000 may be caused to move in the forward direction of movement 1001 while generating the air jet 1004. For example, the robotic cleaner 1000 may be caused to move in the forward direction of movement 1001 until the robotic cleaner 1000 engages with the first and the second vertically extending surfaces 1006 and 1008. In response to engaging with the first and second vertically extending surfaces 1006 and 1008, the robotic cleaner 1000 may be caused to move in the rearward direction of movement 1012 until the robotic cleaner 1000 comes out of engagement with the first and second vertically extending surfaces 1006 and 1008.

[0098] With reference to FIG. 10F, in response to the robotic cleaner 1000 coming out of engagement with the first and second vertically extending surfaces 1006 and 1008, the robotic cleaner 1000 is caused to rotate in the first rotation direction 1014 while generating the air jet 1004. For example, the robotic cleaner 1000 may rotate in the first rotation direction 1014 until the forward direction of movement 1001 is substantially parallel with the second vertically extending surface 1008. By way of further example, the robotic cleaner 1000 may rotate in the first rotation direction 1014 for a rotation angle of about 120°. By way of still further example, the robotic cleaner 1000 may rotate in the first rotation direction 1014 for a rotation angle of about 135°.

[0099] With reference to FIG. 10G, in response to rotating in the first rotation direction 1014 for a second time (e.g., such that the forward direction of movement 1001 is substantially parallel with the second vertically extending surface 1008), the robotic cleaner 1000 is caused to follow the second vertically extending surface 1008 while generating the air jet 1004.

[00100] FIG. 11 shows a schematic example of a robotic cleaner 1100. The robotic cleaner 1100 includes a body 1102 having an agitator chamber 1104 (shown in hidden lines) that is configured to receive one or more agitators 1106 (shown in hidden lines), and one or more driven wheels 1108 (shown in hidden lines) configured to urge the robotic cleaner 1100 across a surface to be cleaned 1101 (e.g., a floor). The robotic cleaner 1100 includes a first side brash 1 110 (shown in hidden lines) and a second side brash 1 1 12 (shown in hidden lines), the first and second side brushes 1110 and 1112 being disposed on opposing sides of a central axis 1114. The central axis 1114 extends parallel to a forward direction of movement of the robotic cleaner 1100 (e.g., extends perpendicular to a rotation axis of the one or more driven wheels 1108). The first and second side brushes 1110 and 1112 are configured to rotate about a rotation axis that extends substantially perpendicular to the surface to be cleaned 1101. In some instances, the robotic cleaner 1100 may not include any air jet assemblies configured to generate an air jet. In these instances, the robotic cleaner 1100 may be generally referred to as a side brush only robotic cleaner. A suction motor 1116 (shown in hidden lines) is fluidly coupled to the agitator chamber 1104 and configured to urge air to flow into the agitator chamber 1104. A dust cup 1118 (shown in hidden lines) may be fluidly coupled to the suction motor 1116 and the agitator chamber 1104 such that at least a portion of debris entrained within air flowing into the agitator chamber 1104 is deposited in the dust cup 1118.

[00101] FIGS. 12-15 show a schematic example of the robotic cleaner 1100 executing a method of cleaning proximate to a vertically extending surface at a corner region 1208 (e.g., a region where a first and second obstacle 1202 and 1204 intersect). One example of the corner region 1208 may include a region defined at the intersection of a first wall with a second wall (e.g., a region where the first and second walls intersect at a substantially perpendicular angle). One or more steps of the method shown in FIGS. 12-15 may be embodied as one or more instructions stored in one or more memories (e.g., one or more non-transitory memories 1120 of FIG. 11), wherein the one or more instructions are configured to be executed on one or more processors (e.g., one or more processors 1122 of FIG. 11). For example, a controller 1124 may be configured to cause one or more steps of the method to be carried out. Additionally, or alternatively, one or more steps of the method may be carried out in any combination of software, firmware, or circuitry (e.g., an application-specific integrated circuit).

[00102] As shown in FIG. 12, the robotic cleaner 1100 is traveling according to a forward movement direction 1206 in a direction of the corner region 1208 (e.g., in a direction substantially parallel to the second obstacle 1204). The comer region 1208 is defined by the first obstacle 1202 and the second obstacle 1204 (e.g., at an intersection of the first and second obstacle 1202 and 1204). The robotic cleaner 1100 can be configured to detect the first obstacle 1202 using at least one sensor as the robotic cleaner 1100 approaches the first obstacle 1202. As shown, the robotic cleaner 1100 is brought into engagement (e.g., contact) with the first obstacle 1202 while following the second obstacle 1204. For example, the robotic cleaner 1100 may engage the first obstacle 1202 such that a displaceable bumper of the robotic cleaner 1100 is displaced, actuating one or more tactile switches. When traveling toward the first obstacle 1202 both the first and second side brushes 1110 and 1112 may be caused to rotate.

[00103] As shown in FIG. 13, in response engaging the first obstacle 1202 (e.g., in response to the displaceable bumper actuating one or more tactile switches), the robotic cleaner 1100 is caused to disable at least one of the first and second side brushes 1110 and/or 1112 (e.g., the side brush closest the second obstacle 1204) and move in a rearward movement direction 1300 for a predetermined distance and/or for a predetermined time, the rearward movement direction 1300 being opposite the forward movement direction 1206. Movement in the rearward movement direction 1300 for the predetermined distance and/or for the predetermined time may be, for example, sufficient to allow the robotic cleaner 1100 to rotate relative to the first and second obstacles 1202 and 1204 (e.g., without contacting the obstacles 1202 and 1204). After moving in the rearward movement direction 1300 for the predetermined distance and/or for the predetermined time, the robotic cleaner 1100 is caused to rotate according to a first rotation direction 1302 (e.g., counter-clockwise) through a rotation angle P and/or for a predetermined time. The rotation angle may be, for example, in a range of 15° to 45°. By way of further example, the rotation angle P may be about 30°. By way of further example, the rotation angle P may be about 45°.

[00104] As shown, when rotating through the rotation angle P in the first rotation direction 1302 and/or for the predetermined time, the first side brush 1110 of the robotic cleaner 1100 is caused to first (or initially) approach the second obstacle 1204 and the second side brush 1112 of the robotic cleaner 1100 is caused to first (or initially) approach the first obstacle 1202. In some instances, one or more of the first and/or second side brushes 1110 and 1112 may come into engagement (e.g., contact) with the first and second obstacles 1202 and 1204.

[00105] As shown in FIG. 14, after rotating through the rotation angle P and/or for the predetermined time in the first rotation direction 1302, the robotic cleaner 1100 is caused to reenable the disabled side brush(es) 1110 and/or 1112 such that both side brushes 1110 and 1112 are enabled and the robotic cleaner 1100 is caused move according to the forward movement direction 1206 until the robotic cleaner 1100 comes into engagement (e.g., contact) with the first and second obstacles 1202 and 1204. For example, the robotic cleaner 1100 may continue to move in the forward movement direction 1206 until a displaceable bumper of the robotic cleaner 1100 is displaced, actuating one or more tactile switches. In some instances, after contacting the first and second obstacles 1202 and 1204, the robotic cleaner 1100 may move in a reverse movement direction until the robotic cleaner 1100 comes out of engagement with the first and second obstacles 1202 and 1204.

[00106] As shown in FIG. 15, after the robotic cleaner 1100 has moved into engagement with the first and second obstacles 1202 and 1204, the robotic cleaner 1100 is caused to rotate in a second rotation direction 1500 (e.g., clockwise) while both side brushes 1110 and 1112 are enabled, the second rotation direction 1500 being opposite the first rotation direction 1302. As the robotic cleaner 1100 rotates according to the second rotation direction 1500, the first and second side brushes 1110 and 1112 are configured to urge debris adjacent the first and second obstacles 1202 and 1204 towards a movement path of a suction inlet of the robotic cleaner 1100. As shown, the robotic cleaner 1100 continues to rotate according the second rotation direction 1500 until the forward movement direction 1206 of the robotic cleaner 1100 is substantially parallel to at least a portion of the first obstacle 1202, allowing the robotic cleaner 1100 to move along (or follow) a perimeter of the first obstacle 1202.

[00107] An example of a robotic cleaner, consistent with the present disclosure, may include one or more driven wheels, one or more sensors configured to detect one or more features of an environment, an air jet assembly configured to generate an air jet, and a side brush, a side brush operational state of the side brush corresponding to an air jet operational state of the air jet assembly.

[00108] In some instances, the robotic cleaner may further include a fan fluidly coupled to the air jet assembly. In some instances, operation of the fan may be based, at least in part, on outputs generated by the one or more sensors. In some instances, the robotic cleaner may further include a suction motor, wherein an exhaust side of the suction motor is fluidly coupled to the air jet assembly. In some instances, the one or more sensors may be configured to detect a presence of a vertically extending surface. In some instances, the air jet assembly may be caused to generate the air jet when the one or more sensors detect the presence of a vertically extending surface. In some instances, the air jet assembly may be caused not to generate the air jet when the one or more sensors do not detect the presence of the vertically extending surface. In some instances, the side brush and the air jet assembly may be disposed on a common side of the robotic cleaner. In some instances, the air jet generated by the air jet assembly may extend outwardly from the robotic cleaner. In some instances, the air jet may extend forwardly and downwardly. In some instances, the side brush operational state may correspond to the air jet operational state when the robotic cleaner traverses a comer. In some instances, the side brush operational state may correspond to the air jet operational state when the robotic cleaner follows a wall.

[00109] Another example of a robotic cleaner, consistent with the present disclosure may include an agitator chamber, a dust cup, a suction motor fluidly coupled to the agitator chamber and the dust cup, one or more sensors configured to detect one or more features of an environment, an air jet assembly configured to generate an air jet, a fan fluidly coupled to the air jet assembly, operation of the fan being based, at least in part, on outputs generated by the one or more sensors, and a controller configured to cause the robotic cleaner to clean an intersection of two vertically extending surfaces.

[00110] In some instances, while the air jet assembly is generating the air jet, the controller may be configured to cause the robotic cleaner to move according to a forward direction of movement, following a first vertically extending surface while approaching a second vertically extending surface, decreasing a second surface separation distance. In some instances, when the second surface separation distance is less than or equal to a second surface threshold, the controller may be configured to cause the robotic cleaner to discontinue movement according to the forward direction of movement. In some instances, the controller may be configured to cause the robotic cleaner to rotate in a first rotation direction. In some instances, the controller may be configured to cause the robotic cleaner to rotate in a second rotation direction, the second rotation direction being different from the first rotation direction. In some instances, prior to the robotic cleaner rotating in the first rotation direction, the air jet assembly may discontinue generation of the air jet. In some instances, the controller may be configured to cause the robotic cleaner to follow the second vertically extending surface after rotating in the first rotation direction. In some instances, prior to rotating in the second rotation direction, the air jet assembly may discontinue generation of the air jet. In some instances, the controller may be configured to cause the robotic cleaner to follow the second vertically extending surface after rotating in the second rotation direction. In some instances, the robotic cleaner may further include a side brush, a side brush operational state of the side brush corresponding to an air jet operational state of the air jet assembly. In some instances, the air jet generated by the air jet assembly may extend outwardly from the robotic cleaner, downwardly, and forwardly. [00111] While the principles of the invention have been described herein, it is to be understood by those skilled in the art that this description is made only by way of example and not as a limitation as to the scope of the invention. Other embodiments are contemplated within the scope of the present invention in addition to the exemplary embodiments shown and described herein. It will be appreciated by a person skilled in the art that a surface cleaning apparatus may embody any one or more of the features contained herein and that the features may be used in any particular combination or sub-combination. Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the claims.