Field of the Invention [0001] The present invention relates to a mixer grinder used for a household purpose. More particularly, the present invention relates to a grinding jar for a mixer grinder.

Background of the Invention

[0002] Mixer grinders are generally a multipurpose machine usually used for grinding food ingredients. Mixer grinders can grind wet as well as dry ingredients. They can also be a substitute for a blender or a juicer. The mixer grinders typically include a motor assembly with blades assembled thereon and a jar. The blades are arranged on a lower surface of the jar, which upon rotation grinds the ingredients inside the jar. The speed of the motor can be adjustable according to the requirement of the grinding ingredients.

[0003] Further, the jars are available in different volumes depending on the usage. For example, a juicer jar may require larger volume compared to other jars. For each purpose, the jars have to be replaced to meet the needs. Hence, more than one jars are required, and that may require more utility space. [0004] Therefore, there is a need to provide a mixer grinder jar in which the volume of the jar can be adjusted according to the user preference, which overcomes few or all of the drawbacks of the existing mixer grinder jars. Objects of the Invention

[0005] An object of the present invention is to provide a grinding jar for a mixer grinder in which the volume of the grinding jar can be adjusted according to the user preference.

[0006] Another object of the present invention is to provide grinding jar for a mixer grinder, in which the ingredients will not stick to the wall of the jar and avoid free rotation of blades without grinding operation. [0007] One more object of the present invention is to provide a grinding jar for a mixer grinder, in which only one jar can be used for multiple volumes as it can be adjusted.

[0008] Yet another object of the present invention is to provide a grinding jar for a mixer grinder, in which the jar can be self-adjusted to the expansion due to an internal pressure while grinding. [0009] Still an object of the present invention is to provide a grinding jar for a mixer grinder which has an improved efficiency since there is no sticking of food ingredients on the wall and no idle rotation of blades. [0010] Further an object of the present invention is to provide a grinding jar for a mi er grinder, which saves overall grinding time as there is no need to remove the ingredients frequently which sticks on the jar walls.

[0011] Still one more object of the present invention is to provide a grinding jar for a mixer grinder which is easy to operate.

[0012] One more object of the present invention is to provide a grinding jar for a mixer grinder, which is robust in construction. Summary of the invention

[0013] According to the present invention, a grinding jar for a mixer grinder in accordance with the present invention is provided. The grinding jar has a jar base and a blade base. The jar base enables the grinding jar to positively fit with the mixer grinder. The blade base configures blades or blade units of various size and shapes to grind ingredients for food. The grinding jar has an opening on the upper portion which is a receptacle for adding ingredients. [0014] The grinding jar includes a holding member and a movable member. The holding member holds the movable member in place while grinding. The movable member is arranged inside the grinding jar. Specifically, the movable member is a circular disc arranged inside the grinding jar and is connected with the holding member coaxially. The holding member holds and supports the movable member. The movable member and the holding member are connected by a connecting rod. Specifically, the holding member holds the connecting rod centrally. A lower end of the connecting rod connects to the movable member and the upper end of the connecting member extends upwards through the holding member. The holding member has an opening at the centre through which the connecting rod extends outwards. The extended portion of the connecting member has a handle portion on the upper end.

[0015] The movable member is movable between the holding member and the blades for adjusting the volume of the jar. Specifically, the movable member moves in a Z-direction along an inner circumference of the grinding jar. The movement of the movable member defines the volume of the grinding jar. If the movable member moves towards the blade base, the operational volume of the grinding jar decreases. The operational volume is the volume of the grinding jar utilized for grinding. Similarly, when the movable member moves towards the holding member, the operational volume increases. The movable member is moved manually using the handle portion. The grinding jar has a curved geometry towards the blade base which prevents the movable member touching the blades while adjusting the volume.

Brief Description of the Drawings

[0016] The advantages and features of the present invention will be understood better with reference to the following detailed description and claims taken in conjunction with the accompanying drawings, wherein like elements are identified with like symbols, and in which:

[0017] Figure 1 illustrates a schematic representation of a grinding jar for a mixer grinder in accordance with the present invention;

[0018] Figure 2 illustrates an exploded view of the mixer grinder;

[0019] Figure 3 illustrates a partial sectional view of the grinding jar in accordance with the present invention; and

[0020] Figure 4 illustrates an alternate embodiment of the grinding jar.

Detailed Description of the Invention [0021] An embodiment of this invention, illustrating its features, will now be described in detail. The words "comprising, "having, "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items.

[0022] The terms“first,”“second,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms “an” and “a” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

[0023] The disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms.

[0024] Referring to figures 1 and 2, a grinding jar 100 for a mixer grinder 200 in accordance with the present invention is illustrated. The grinding jar 100 has a jar base 210 and a blade base 220. The jar base 210 enables the grinding jar 100 to positively fit with a housing 300 of the mixer grinder 200. The blade base 220 configures blades or blade units of various size and shapes to grind ingredients for food. The grinding jar 100 has an opening 100a (refer figure 2) on the upper portion which is a receptacle for adding ingredients such as grains, spices and the like suitable for grinding.

[0025] The grinding jar 100 includes a holding memberl 10 and a movable member 120. The holding memberl 10 is attachable with the opening 100a of the grinding jar 100 and holds the movable member 120. The holding memberl 10 may have flanges 112 on its sides to firmly attach the holding memberl 10 with the circumference of the opening 100a as shown in figure 3. The flanges 112 may be made of rubber or plastic or any other suitable material. The holding memberl 10 and the movable member 120 are coaxially arranged. Specifically, the holding member 110 holds the movable member 120 in place while grinding.

[0026] The movable member 120 is arranged inside the grinding jar 100. Specifically, the movable member 120 is a circular disc arranged inside the grinding jar 100 and is connected with the holding memberl 10 coaxially. The holding memberl 10 holds and support the movable member 120. The movable member 120 and the holding memberl 10 are connected by a connecting rod 130. Specifically, the holding member 110 holds the connecting rod 130 centrally. A lower end 130a of the connecting rod 130 connects to the movable member 120 and an upper-end 130b of the connecting member 130 extends upwards through the holding memberl 10. The holding memberl 10 has an opening 132 at the centre through which the connecting rod 130 extends outwards. The extended portion of the connecting rod 130 has a handle/knob 140 on the upper-end 130b. The handle 140 is used to operate the connecting rod

130.

[0027] Further referring again to figure 2, a grip ring 142 is arranged on the opening 132 of the holding member 110. The grip ring 142 provides optimum pressure on the connecting rod 130 to hold the holding memberl lO at the desired position. The grip ring 142 may be a washer made of rubber which provides enough friction to prevent the free movement of the movable member 120. The grip ring 142 ensures enough friction to hold the movable member 120 with the holding memberl 10.

[0028] The movable member 120 is movable between the holding memberl lO and the blades 220a for adjusting the volume of the grinding jar 100. Specifically, the movable member 120 moves in a Z-direction along an inner circumference of the grinding jar 100. The movement of the movable member 120 defines the volume of the grinding jar 100. If the movable member 120 moves towards the blade 220a, the operational volume of the grinding jar 100 decreases. The operational volume is the volume of the grinding jar 100 utilized for grinding. Similarly, when the movable member 120 moves towards the holding memberl lO and away from the blade 220a, the operational volume increases. The movable member 120 is moved manually using the handle 140. The grinding jar 100 has a curved geometry towards the blade base 220 which prevents the movable member 120 touching the blades 210a while adjusting the volume.

[0029] Further, the movable member 120 is provided with a safety valve 122 as shown in figures 1 , 2 and 3. The safety valve 122 releases the pressure inside the grinding jar 100 under elevated pressure inside the grinding jar 100. The safety valve 122 may enable automatic movement of the movable member 120 according to the pressure inside the grinding jar 100. Further, a flexible seal 124 is wrapped around the movable member 120 to prevent the spillage of ingredients outside the functional volume formed the grinding jar 100 as shown in figures 2 and 3. The flexible seal 124 may be made out of food grade rubber. The movable member 120 may be having a spring load (not shown) so that the movable member 120 can be self-adjusted to the expansion due to an internal pressure while grinding.

[0030] Further, in an alternate embodiment, an operating member

150 as shown in figure 4 may be connected to the connecting rod 130. The connecting rod 130 can be a screw or a rack. The movable member 120 can be adjusted with a rack and pinion mechanism. In this embodiment, the rack functions as the connecting rod 130 which connects the holding memberl 10 and the movable member 120. The pinion may be arranged adjacent to the operating member 150. The operating member 150 allows the pinion to rotate clockwise and anticlockwise direction which enables the rack to move up and down vertically. The movement of the rack facilitates the movable member to adjust the volume inside the grinding jar 100.

[0031] In another embodiment (not shown), the movable member 120 may be adjusted by a friction pressor a screw mechanism or any such similar types of mechanisms. In case of the friction press, a wheel (not shown) may be mounted above the holding memberl 10 which operates as the operating member 150. The wheel may be connected to a screw mechanism (not shown) which may be connected to the movable member 120. The rotation of the wheel in clockwise and anticlockwise direction allows the screw to move up and down vertically. The movement of the screw facilitates the movable member 120 to adjust the volume inside the grinding jar 100. Further, it may be obvious to a person skilled in the art to provide any similar mechanism which allows the movable member 120 to move up and down thereby adjusting the volume of the grinding jar 100.

[0032] Therefore the present invention has an advantage of providing a grinding jar 100 for the mixer grinder 200 in which the volume of the grinding jar 100 can be adjusted according to the user preference. Since the volume of the grinding jar 100 is set to the just required, the ingredients which need to be ground will not stick to the wall of the grinding jar 100 and avoid free rotation of blades without grinding operation. Further, only one jar grinding 100 can be used for multiple volumes as the volume can be adjusted. Further, it improves the efficiency of the mixer grinder 200 since there is no sticking of food ingredients on the wall and no idle rotation of blades. Also, it will save overall grinding time as there is no need to remove the ingredients frequently which sticks on the jar walls. [0033] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, and to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the scope of the claims of the present invention.