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Patent Searching and Data


Matches 551 - 600 out of 8,646

Document Document Title
WO/2013/049573A2
Hydraulic valve arrangements may be assembled to provide pre-compensation or post-compensation using the same chassis body. A first type of main spool is disposed in a main passage and a first type of pressure compensator spool is dispos...  
WO/2013/048745A1
A hydraulic system (72) is disclosed. The hydraulic system may have a pump (80), a first actuator (34), and a meterless circuit (74) connecting the first actuator to the pump. The hydraulic system may also have a second actuator (26) con...  
WO/2013/048712A1
A hydraulic system (56) is disclosed. The hydraulic system may have a pump (80), and a hydraulic actuator (26) having a first chamber (52) and a second chamber (54). The hydraulic system may also have a first pump passage (82) fluidly co...  
WO/2013/048895A1
A hydraulic system (72) is disclosed. The hydraulic system may have a pump (80) with variable-displacement, a first linear actuator (26), and a second linear actuator (26) coupled to the first linear actuator to operate in tandem. The fi...  
WO/2013/048796A1
A hydraulic system (56) is disclosed. The hydraulic system may have a pump (66), a rotary actuator (42L), a linear actuator (34), and a closed- loop circuit (58) fluidly connecting the pump to the rotary and linear actuators. The hydraul...  
WO/2013/048803A1
A hydraulic system (72) is disclosed. The hydraulic system may have an over-center, variable-displacement pump (80), an actuator (26), and first and second passages that create a closed- loop circuit (74). The hydraulic system may also h...  
WO/2012/173815A3
A closed hydrostatic circuit (10) with variable charge and variable flushing systems is disclosed. A variable displacement charge pump (47) is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An elect...  
WO/2013/041884A1
A three position four way compensating valve comprises an outer body member (6) having a valve inlet port (28)(30) and a valve outlet port (26)(32). A fluid pathway is defined between the inlet port (28)(30) and the outer port (26)(32). ...  
WO/2013/043137A1
The present invention ensures that an element (13) that prevents falling of the load by entrapment of the hydraulic fluid within a hydraulic cylinder also functions as discharging the entrapped hydraulic fluid in order to assure the lowe...  
WO/2013/037356A1
The invention relates to a fluid valve arrangement, comprising a bistable fluid valve (10a) for at least one fluid line (18), having a valve body (12) that can be brought into two positions for two switching states, wherein a pressure pu...  
WO/2012/149005A3
A reciprocating pump comprises a cylinder, an inlet check valve, a piston, an outlet check valve and a purge circuit. The cylinder has a first end and a second end. The inlet check valve is disposed proximate a first end of the cylinder....  
WO/2013/036355A2
A hydraulic system (46) is disclosed. The hydraulic system may have a pump (50), a tank (99), a displacement actuator (134) having first and second chambers (136, 140), a regeneration valve (78), and a load-holding valve (86, 88). The hy...  
WO/2012/128797A3
A normally closed, electrical solenoid actuated, pressure compensated, proportional, hydraulic flow control valve (4) includes a fluid flow control poppet valve (5), a pilot operator (6), a solenoid operator (7) and a pressure compensato...  
WO/2013/036432A1
Embodiments of the invention provide a high-reliability, cost-effective electro- hydraulic servo-valve assembly that is not susceptible to failure caused by contaminated fluid. In particular embodiments, the electro-hydraulic servo-valve...  
WO/2012/162235A3
A pump system (24) is disclosed. The pump system may have a pump (28) with a displacement that is variable, and an actuator (34) movable to adjust the displacement of the pump. The pump system may also have an electro- hydraulic valve (3...  
WO/2013/033379A1
A hydraulic system (46) is disclosed. The hydraulic system may have a pump (50), a hydraulic actuator (22), and first and second passages (56, 58) fluidly connecting the pump to the hydraulic actuator in a closed-loop. The hydraulic syst...  
WO/2013/006552A3
An improved mass flow controller with a body having an inlet and an outlet; a sensor adapted to sense the flow of material out of the outlet; a controller adapted to receive a signal from the sensor; a proportional valve operatively conn...  
WO/2013/033538A1
A pneumatic controller (300) described herein includes a housing (302) to be connected to an actuator (108). The housing contains a position monitor (306) with a wireless communication interface. The pneumatic controller also includes a ...  
WO/2013/032796A1
A hydraulic system (46) is disclosed. The hydraulic system may have a primary pump (50), a hydraulic actuator (22), and first and second passages (56, 58) fluidly connecting the primary pump to the hydraulic actuator in a closed-loop man...  
WO/2013/003047A3
A hydraulic control system (50) for a machine (10) is disclosed. The hydraulic control system may have a work tool (16) movable through segments of an excavation cycle, a motor (49) configured to swing the work tool during the excavation...  
WO/2012/166223A3
A hydraulic control system (48) is disclosed. The hydraulic control system may have a hydraulic actuator (20), a valve arrangement (54), and an operator input device (98) configured to generate a first signal indicative of a desired hydr...  
WO/2013/026189A1
Disclosed are a concrete pump truck and a hydraulic control system thereof. The hydraulic control system includes: a first hydraulic pump (11); a flow control assembly (2) of which an input end is connected with an oil outlet of the firs...  
WO/2013/026760A1
A manual override device for controlling at least one valve in a power system includes a rod having a first end and a second end. An attachment is configured to attach to a spool of the at least one valve and includes a clearance with re...  
WO/2013/026199A1
Disclosed is a coupling device (30) for hydraulic elements, which coupling device (30) is used for connecting a first hydraulic element (10) having a first oil port (11) with a second hydraulic element (20) having a second oil port (21),...  
WO/2013/003049A3
A swing energy recovery system (50) for a machine (10) is disclosed. The swing energy recovery system may have a pump (58) configured to pressurize fluid, a motor (49) driven by a flow of pressurized fluid from the pump, and an energy re...  
WO/2013/025583A1
A machine (10) includes a frame (12) having ground engaging propulsion elements (24) coupled therewith, and a hydraulically actuated implement system (26) having a linkage (28), an implement (30) coupled with the linkage (28), and a hydr...  
WO/2013/023381A1
Disclosed are a hydraulic oil flow distribution method and a device thereof for hydraulic system. The hydraulic system includes multiple oil passages and an oil pump from which hydraulic oil is supplied to the multiple oil passages. The ...  
WO/2013/023366A1
A brake valve assembly comprises an accumulator (52) for storing oil, a pressure detector for detecting pressure of the oil in the accumulator, a liquid charging valve (40a, 40b) arranged on a liquid charging oil passage of the accumulat...  
WO/2013/023454A1
A pumping device comprises: a first pumping cylinder (1) and a second pumping cylinder (2), a first piston (31) being disposed in the first pumping cylinder (1) and a second piston (32) being disposed in the second pumping cylinder (2); ...  
WO/2013/006423A3
A pump system includes a closed-loop fluid circuit and an open-loop fluid circuit. The closed-loop fluid circuit includes a motor for rotating a first component connected to the closed-loop fluid circuit. A closed-loop pump drives the mo...  
WO/2013/022131A1
The present invention relates to a hydraulic control system for construction machinery capable of supplying a working fluid from a hydraulic pump to both an arm cylinder and a bucket cylinder and operating same, while performing a comple...  
WO/2013/020913A1
A sliding valve (10) is described, with a valve slide (20) which can be acted upon in a first direction by an actuator (48) and in a second direction opposite to the first direction by an actuation device (44) and which, by means of cont...  
WO/2012/166520A3
A hydraulic fluid system (150) for a mobile machine (100) includes a closed loop hydraulic fan circuit (10). The hydraulic fan circuit (10) includes a primary pump (14), a motor (18) fluidly connected to the primary pump (14), and a fan ...  
WO/2013/022132A1
The present invention relates to a hydraulic control system for construction machinery capable of variably adjusting a set pressure of a relief valve, which controls a set pressure of a hydraulic system, according to a value inputted by ...  
WO/2013/013760A1
The invention relates to a valve device for influencing a supply of fluid to fluidically operated consumer units, comprising a valve module (2) that has a valve housing (4) in which valve shafts (33) for receiving valve cartridges (32) a...  
WO/2013/015467A1
Disclosed is a hydraulic system for controlling the degree of openness of an arm regeneration valve by driving an electronic proportional control valve during a combined operation of simultaneously operating an arm and a swing device. Th...  
WO/2013/013743A1
Proposed is a multi-way valve (1) which has two valve units (2a, 2b) with two valve elements (17a, 17b) arranged in a common receiving bore (15). Each valve element (17a, 17b) can be positioned selectively in an outer switching position,...  
WO/2012/166225A3
A hydraulic control system (48) for a machine (10) is disclosed. The hydraulic control system may have a hydraulic circuit (50), and a pump (58) configured to supply pressurized fluid to the hydraulic circuit. The hydraulic control syste...  
WO/2012/102986A3
A pneumatic manifold for a braking system of a railway vehicle includes a first manifold section and a second manifold section, each having an interior surface thereon and a plurality of ports and passageways extending therethrough, and ...  
WO/2013/008964A1
Disclosed is an actuator damping control system for reducing shocks imparted to a hydraulic actuator caused by a change in load resulting from an abrupt manipulation of a boom or other working device. The hydraulic actuator damping contr...  
WO/2013/009601A1
A poppet valve assembly (262, 462) includes a body (294, 494) and first and second check valves (293, 493). The body (294, 494) includes opposing first and second axial end portions (300, 500). The first end portion has a first circumfer...  
WO/2013/008965A1
Disclosed is a flow control valve for easily performing multiple operations while simultaneously operating a working device, such as an arm, and a swing device by either limiting a portion of a working fluid supplied to the working devic...  
WO/2013/004521A2
The present invention relates to a braking system module (1), such as an coilbox (2), comprising a housing (3) and a connector (6). The connector comprises a connector body (7) and contact elements (8) defining a connection interface (9)...  
WO/2013/006423A2
A pump system includes a closed-loop fluid circuit and an open-loop fluid circuit. The closed-loop fluid circuit includes a motor for rotating a first component connected to the closed-loop fluid circuit. A closed-loop pump drives the mo...  
WO/2012/154462A3
A method and apparatus for controlling discharge pressure and pump displacement of a plurality of variable displacement hydraulic pumps (102, 103) having connected discharge ports (206) is provided. Each pump (102, 103) includes a swashp...  
WO/2012/148961A3
The present disclosure sets forth an axial piston pump with greatly improved throughput. The axial piston pump provides cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the ove...  
WO/2012/145290A3
First and second mechanical hydraulic valves (342, 340) are disposed between a pump (180) and the cap side chamber (170) of an actuator (132) and the pump (180) and the rod chamber (168) of the pump (180). The first and second valves (34...  
WO/2012/145208A3
A hydraulic system (104, 250) includes an actuator (132, 260), a pump (180, 258), rod side and cap side fluid connections (172, 174, 261, 259) between the pump (180, 258) and the rod and cap side chambers (168, 262, 170, 259), respective...  
WO/2012/154464A3
This disclosure provides for pressure limiting a hydraulic system (100, 200) to a desired pressure value by a particular circuit by controlling and closing the compensator when the desired pressure setting is achieved. Closing the compen...  
WO/2013/002429A1
Provided is a hydraulic control valve in which a center bypass passage is not blocked, but is unloaded when a swing and an arm are operated at the same time to prevent the pressure in a hydraulic pump from being increased. The hydraulic ...  

Matches 551 - 600 out of 8,646