FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
“A JAR UNIT FOR A MIXER GRINDER”
We, Bajaj Electricals Limited, an Indian National, of 45/47, Veer Nariman Road, Fort Mumbai- 400001, India.
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
The present disclosure relates to the field of food processors. More particularly, the present disclosure relates to a jar unit for a mixer grinder.
BACKGROUND OF THE INVENTION
This section is intended to provide information relating to the field of the invention and thus any approach or functionality described below should not be assumed to be qualified as prior art merely by its inclusion in this section.
A variety of food processors are known in the food processor industry, to be used for the purposes of grinding, mixing and blending various food and/or edible ingredients. A mixer grinder includes a processing unit and a jar unit, wherein the jar unit carries food articles and may be connected to the processing unit, to perform processing of the food articles. The processing unit includes a motor assembly housed within a main housing, and a cutter assembly connected to a rotor of the motor assembly, such that the cutter assembly is driven by the motor assembly for performing processing operations thereof.
Conventionally, the jar unit comprises of a jar member for receiving the food articles therein, a lid member adapted to cover the jar member to create an enclosed space to enable mixing, grinding, and blending operations therein. Notably, the enclosed space corresponds to a fixed operational volume thereof. There exists a problem in the existing jar units. For example, the jar unit having 500 ml (milliliters) operational volume, when used in grinding operation for small quantity of food articles, results in coarse particles or lumps of the food articles.
A conventional solution to the said problem is to provide for an additional jar unit having a smaller fixed operational volume, for example, 200 ml or 300 ml. However, such an additional jar unit not only increases the overall cost incurred, but also adds on to the discomfort for the user as the additional jar unit occupies more space.

Accordingly, there is a well felt need to provide a jar unit for the mixer grinder, having variable operational volume based on the requirements of the user, more particularly, convertible between two configurations, such that one of the two configurations provides for a low operational volume thereof, while the other provides for a high operational volume.
SUMMARY OF THE INVENTION
This section is intended to introduce certain aspects of the disclosed invention in a simplified form, and is not intended to identify the key advantages or features of the present disclosure.
In an aspect of the present invention there is provided a jar unit for a mixer grinder, comprising: a jar member; a lid member adapted to mate with and cover the jar member; and a lid accessory member adapted to be removably attached to at least a portion of the lid member; wherein, in a first configuration of the jar unit, the lid member mates with the jar member, to form a first enclosed space having a first volume (V1) therein, and in a second configuration of the jar unit, the lid accessory member attached with the portion of the lid member mates with the jar member, to form a second enclosed space having a second volume (V2) therein, such that the first volume (V1) is greater than the second volume (V2).
In an aspect of the present invention, the lid accessory member is removably attached to at least a portion of the lid member by means of a bayonet attachment.
In yet another aspect of the present invention, the lid member defines one or more bayonet slots spaced at intervals along an inner periphery thereof.
In another aspect of the present invention, the lid accessory member includes: a substantially cylindrical structure defining one or more bayonet extensions at intervals along a periphery thereof; and a bottom face adjacent to the substantially cylindrical structure, having at least a predetermined shape; wherein the one or

more bayonet extensions mate with the one or more bayonet slots defined in the lid member, to form the bayonet attachment.
In an aspect of the present invention, the bottom face of the lid accessory member includes a cylindrical periphery, a flat floor portion, and one or more slanted wall portions connecting the flat floor portion to the cylindrical periphery thereof.
In another aspect of the present invention, the bottom face of the lid accessory member includes a cylindrical periphery, a flat floor portion, and at least a first and second semi-involute wall portions defining a first and second flat ends, respectively.
In yet another aspect of the present invention, the bottom face of the lid accessory member defines at least a first rib and a second rib extending from the cylindrical periphery towards the flat floor portion thereof.
In still another aspect of the present invention, each of the first and second ribs defined in the lid accessory member are oppositely aligned, to interrupt the flow of food ingredients, in the second configuration of the jar unit.
In an aspect of the present invention, the bottom face defines a through-hole passing through a center of the flat floor portion, wherein the through-hole is adapted to facilitate pressure release in the second configuration of the jar unit.
In an aspect of the present invention, the substantially cylindrical structure of the lid accessory member defines a gasket provision proximal to the bottom face thereof, such that the gasket provision is adapted to receive a gasket.
In another aspect of the present invention, in the first configuration of the jar unit, the usable space is first volume (V1); and in the second configuration of the jar unit, the usable space is second volume (V2).
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The present invention, both as to its organization and manner of operation, together with further objects and advantages, may best be understood by reference to the following description, taken in connection with the accompanying drawings. These and other details of the present invention will be described in connection with the accompanying drawings, which are furnished only by way of illustration and not in limitation of the invention, and in which drawings:
Figure 1 illustrates a section perspective view of a jar unit, in a first configuration, in accordance with the concepts of the present disclosure.
Figure 2 illustrates a section perspective view of the jar unit, in a second configuration, in accordance with the concepts of the present disclosure.
Figure 3 illustrates a perspective view of a lid member of the jar unit, in accordance with the concepts of the present disclosure.
Figure 4 illustrates a lid accessory member of the jar unit, in accordance with the first embodiment of the present disclosure.
Figure 5 illustrates the lid accessory member of the jar unit, in accordance with the second embodiment of the present disclosure.
Figure 6 illustrates the lid member and the lid accessory member of the jar unit, in an assembled state, in accordance with the concepts of the present disclosure.
DETAILED DESCRIPTION OF THE INVENTION
In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent, however, that embodiments of the present invention may be practiced without these specific details. Several features described hereafter can each be used independently of one another or with any combination of other features. An individual feature may not address any of the problems discussed above or might address only one of the problems discussed above. Some

of the problems discussed above might not be fully addressed by any of the features described herein. Example embodiments of the present invention are described below, as illustrated in various drawings in which like reference numerals refer to the same parts throughout the different drawings.
The present invention provides a jar unit [100] for a mixer grinder, comprising: a jar member [102]; a lid member [104] adapted to mate with and cover the jar member [102]; and a lid accessory member [108] adapted to be removably attached to at least a portion of the lid member [104]; wherein, in a first configuration of the jar unit [100], the lid member [104] mates with the jar member [102], to form a first enclosed space having a first volume (V1) therein, and in a second configuration of the jar unit [100], the lid accessory member [108] attached with at least a portion of the lid member [104] mates with the jar member [102], to form a second enclosed space having a second volume (V2) therein, such that the first volume (V1) is greater than the second volume (V2).
In a preferred embodiment, the lid accessory member [108] is removably attached to at least a portion of the lid member [104] by means of a bayonet attachment.
In an embodiment, the lid member [104] defines one or more bayonet slots [104a] spaced at intervals along an inner periphery thereof. In an embodiment, the lid accessory member [108] including: a substantially cylindrical structure [110] defining one or more bayonet extensions [110c] at intervals along a periphery thereof; and a bottom face [112] adjacent to the substantially cylindrical structure [110], having at least a predetermined shape; wherein the one or more bayonet extensions [110c] mate with the one or more bayonet slots [104a] defined in the lid member [104], to form the bayonet attachment.
In an embodiment, the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a], a flat floor portion [112b], and one or more slanted wall portions [112c] connecting the flat floor portion [112b] to the cylindrical periphery [112a] thereof. In the said embodiment, the bottom face [112]

of the lid accessory member [108] defines at least a first rib [116] and a second rib [118] extending from the cylindrical periphery [112a] towards the flat floor portion [112b] thereof. In an embodiment, each of the first and second ribs [116, 118] defined in the lid accessory member [108] are oppositely aligned, to interrupt the flow of food ingredients, in the second configuration of the jar unit [100].
In an alternate embodiment, the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a’], a flat floor portion [112b’], and at least a first and second semi-involute wall portions [112c’, 112d’] defining a first and second flat ends [116’, 118’], respectively. In another embodiment, the bottom face [112] defining a through-hole [114] passing through a center of the flat floor portion [112b, 112b’], wherein the through-hole [114] is adapted to facilitate pressure release in the second configuration of the jar unit [100].
In another embodiment, the substantially cylindrical structure [110] of the lid accessory member [108] defines a gasket provision [110b] proximal to the bottom face [112] thereof, such that the gasket provision [110b] is adapted to receive a gasket. In yet another embodiment, in the first configuration of the jar unit [100], the usable space is first volume (V1); and in the second configuration of the jar unit [100], the usable space is second volume (V2).
Figure 1 illustrates the jar unit [100] in the first configuration, while figure 2 illustrates the jar unit [100] in a second configuration, in accordance with the concepts of the present disclosure. Figures 1 and 2 are to be referred to in conjunction with each other, in order to completely understand the concepts of the present disclosure. A structure and arrangement of the jar unit [100] will be described hereinafter in detail.
The jar unit [100] comprises the jar member [100], the lid member [104], and the lid accessory member [108]. The lid member [104] is adapted to mate with and cover the jar member [102], while the lid accessory member [108] is adapted to be removably attached to at least a portion of the lid member [104]. More particularly,

the lid accessory member [108] is adapted to be removably attached to at least a portion of the lid member [104] by means of a bayonet attachment.
As seen in figure 1, in the first configuration of the jar unit [100], the lid member [104] mates with the jar member [102]. Notably, in such configuration of the jar unit [100], a first enclosed space having a first volume (V1) is formed therein. In other words, the usable space of the jar unit [100] for mixing, grinding, and blending operations, in the first configuration, is first volume (V1). While, as seen in figure 2, in the second configuration of the jar unit [100], the lid accessory member [108] attached with at least a portion of the lid member [104] mates with the jar member [102]. In particular, such configuration of the jar unit [100] provides for a second enclosed space having a second volume (V2) therein. In other words, the usable space of the jar unit [100] for mixing, grinding, and blending operations, in the second configuration, is second volume (V2). Notably, the first volume (V1) is greater than the second volume (V2). A structure and arrangement of each of the lid accessory member [108] and the lid member [104] will be discussed hereinafter in detail.
The lid accessory member [108] includes a substantially cylindrical structure [110] and a bottom face [112] adjacent to the substantially cylindrical structure [110], wherein the substantially cylindrical structure [110] defines one or more bayonet extensions [110c]. Whereas, referring to figure 3, the lid member [104] defines one or more bayonet slots [104a] spaced at intervals along an inner periphery thereof. As seen in figure 6, particularly, the one or more bayonet extensions [110c] of the lid accessory member [108] mate with the one or more bayonet slots [104a] defined in the lid member [104], to form the bayonet attachment. In an exemplary embodiment of the present invention, the substantially cylindrical structure [110] of the lid accessory member [108] defines four (4) equidistant bayonet extensions [110c], while the lid member [104] defines four (4) equidistant bayonet slots [104a] along the inner periphery thereof, such that the four bayonet extensions [110c] mate with the four bayonet slots [104a], to form the bayonet attachment thereof.

Furthermore, the substantially cylindrical structure [110] of the lid accessory member [108] defines a gasket provision [110b] proximal to the bottom face [112] thereof, such that the gasket provision [110b] is adapted to receive a gasket. The gasket may be received in the gasket provision [110b], to rigidly mate the lid accessory member [108] with the jar member [102], in a second configuration of the jar unit [100].
As seen in figure 4, in a first embodiment of the present invention, the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a], a flat floor portion [112b], and one or more slanted wall portions [112c]. Notably, the one or more slanted wall portions [112c] connect the flat floor portion [112b] to the cylindrical periphery [112a] of the bottom face [112]. In an exemplary embodiment, the one or more slanted wall portions [112c] of the bottom face [112] together define an octagonal cut-out. Although, the one or more slanted wall portions [112c] are said to define an octagonal cut-out, it may be obvious to a person skilled in the art that other known geometrical shapes may also be within the scope of the present invention. In addition to the above, the bottom face [112] of the lid accessory member [108] further defines at least a first rib [116] and a second rib [118] extending from the cylindrical periphery [112a] towards the flat floor portion [112b] thereof. More particularly, each of the first and second ribs [116, 118] defined in the lid accessory member [108] are oppositely aligned, to interrupt the flow of food ingredients, in the second configuration of the jar unit [100].
As seen in figure 5, in a second embodiment, the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a’], a flat floor portion [112b’], and at least a first and second semi-involute wall portions [112c’, 112d’] defining a first and second flat ends [116’, 118’], respectively. Notably, each of the first and second flat ends [116’, 118’] is adapted to interrupt the flow of food ingredients, in the second configuration of the jar unit [100]. Furthermore, in each of the first and second embodiments of the present invention, the bottom face [112] defines a through-hole [114] passing through a center of the flat floor portion [112b,

112b’]. Essentially, the through-hole [114] is adapted to facilitate pressure release in the second configuration of the jar unit [100].
EXAMPLE
An exemplary of the present invention has been given hereunder, illustrating a comparative analysis of efficiency of the conventional large quantity jar unit, the conventional small quantity jar unit, and the jar unit [100] of the present invention. The term “efficiency” refers to efficiency of mixing and/or grinding operations within the jar units. For determination of efficiency, initially, the ground recipe is made to pass through a sieve size 710 µm. Thereafter, the efficiency is calculated basis the weight of residue remaining over the sieve versus weight of total ground recipe passed through the sieve, by way of the following formula:

A mix of 43g of coconut and 20g of water is ground in each of a 400 ml conventional jar unit, a 200 ml conventional jar unit, and the jar unit [100] of the present invention in the second configuration. Thereafter, the resultant efficiency for each of the aforementioned jar units are calculated based on the aforementioned formula. Table 1 provided hereinbelow illustrates calculated efficiency in a tabulated form.
Table 1:

S. No. Jar unit(s) % Efficiency
1 Conventional 400 ml jar unit 43.9
2 Conventional 200 ml jar unit 68.3
3 Jar unit [100] 76.3
Thus, in view of the present example, the jar unit [100] of the present invention proves to be efficient in mixing, grinding, and blending operations, over the existing arts.

Advantageously, the jar unit [100] of the present invention provides for variable usable volumes thereof, particularly, variable between a high volume for high quantity mixing, grinding, and blending operations and a low volume for low quantity mixing, grinding, and blending operations. Moreover, the lid accessory member [108] enables reduction of the operational volume of the jar unit [100] in the second configuration thereof, and thus, thereby reduces the requirement of an additional small-quantity jar unit of the existing art. Furthermore, the first and second ribs [116, 118] defined in the lid accessory member [108] enhance the efficiency of mixing, grinding, and blending operations thereof, by interrupting flow of food ingredients therein. Moreover, the bayonet attachment between the lid member [104] and the lid accessory member [108] provide for easy locking and unlocking thereof, thereby enhancing ease of installation and use of the jar unit [100].
While the preferred embodiments of the present invention have been described hereinabove, it should be understood that various changes, adaptations, and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims. It will be obvious to a person skilled in the art that the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive.
LIST OF COMPONENTS
100 – Jar unit
102 – Jar member
104 – Lid member
104a – Bayonet slots
108 – Lid accessory member
110 – Substantially cylindrical structure

110b – Gasket provision
110c – Bayonet extensions
112 – Bottom face
112a – Cylindrical periphery (first embodiment)
112a’ – Cylindrical periphery (second embodiment)
112b – Flat floor portion (first embodiment)
112b – Flat floor portion (second embodiment)
112c – Slanted wall portions (first embodiment)
112c’, 112d’ – First and Second semi-involute wall portions (second embodiment)
114 – Through-hole
116 – First rib (first embodiment)
116’ – First flat end (second embodiment)
118 – Second rib (first embodiment)
118’ – Second flat end (second embodiment)

I/We Claim:
1. A jar unit [100] for a mixer grinder, comprising:
- a jar member [102];
- a lid member [104] adapted to mate with and cover the jar member [102]; and
- a lid accessory member [108] adapted to be removably attached to at least a portion of the lid member [104]; wherein,
in a first configuration of the jar unit [100], the lid member [104] mates with the jar member [102], to form a first enclosed space having a first volume (V1) therein, and
in a second configuration of the jar unit [100], the lid accessory member [108] attached with at least a portion of the lid member [104] mates with the jar member [102], to form a second enclosed space having a second volume (V2) therein, such that the first volume (V1) is greater than the second volume (V2).
2. The jar unit [100] as claimed in claim 1, wherein the lid accessory member [108] is removably attached to at least a portion of the lid member [104] by means of a bayonet attachment.
3. The jar unit [100] as claimed in claim 1, wherein the lid member [104] defines one or more bayonet slots [104a] spaced at intervals along an inner periphery thereof.
4. The jar unit [100] as claimed in claim 1 and 3, the lid accessory member [108] including:

- a substantially cylindrical structure [110] defining one or more bayonet extensions [110c] at intervals along a periphery thereof; and
- a bottom face [112] adjacent to the substantially cylindrical structure [110], having at least a predetermined shape;

wherein the one or more bayonet extensions [110c] mate with the one or more bayonet slots [104a] defined in the lid member [104], to form the bayonet attachment.
5. The jar unit [100] as claimed in claim 4, wherein the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a], a flat floor portion [112b], and one or more slanted wall portions [112c] connecting the flat floor portion [112b] to the cylindrical periphery [112a] thereof.
6. The jar unit [100] as claimed in claim 4, wherein the bottom face [112] of the lid accessory member [108] includes a cylindrical periphery [112a’], a flat floor portion [112b’], and at least a first and second semi-involute wall portions [112c’, 112d’] defining a first and second flat ends [116’, 118’], respectively.
7. The jar unit [100] as claimed in claim 5, wherein the bottom face [112] of the lid accessory member [108] defines at least a first rib [116] and a second rib [118] extending from the cylindrical periphery [112a] towards the flat floor portion [112b] thereof.
8. The jar unit [100] as claimed in claim 7, wherein each of the first and second ribs [116, 118] defined in the lid accessory member [108] are oppositely aligned, to interrupt the flow of food ingredients, in the second configuration of the jar unit [100].
9. The jar unit [100] as claimed in claim 5 and 6, the bottom face [112] defining a through-hole [114] passing through a center of the flat floor portion [112b, 112b’], wherein the through-hole [114] is adapted to facilitate pressure release in the second configuration of the jar unit [100].
10. The jar unit [100] as claimed in claim 4, wherein the substantially cylindrical structure [110] of the lid accessory member [108] defines a gasket provision [110b] proximal to the bottom face [112] thereof, such that the gasket provision [110b] is adapted to receive a gasket.

11. The jar unit [100] as claimed in claim 1, wherein in the first configuration of the jar unit [100], the usable space is first volume (V1); and in the second configuration of the jar unit [100], the usable space is second volume (V2).