FORM 2
THE PATENTS ACT, 1970 (39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
COMPLETE SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
Composite mixing bowl for an electric grinder
INVENTOR
Name : Phase Shantanu Purushottam
Nationality : Indian National Address : Crompton Greaves Ltd
Information Technology, D-2, MIDC, Waluj,
Ahmedabad, Gujarat, India,
APPLICANTS
Name : CROMPTON GREAVES LIMITED
Nationality : Indian Company
Address : CG House, Dr Annie Besant Road, Prabhadevi, Mumbai 400025, Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

Another object of the invention is to provide an electric grinder comprising a composite mixing bowl which can be easily assembled and disassembled.
DETAILED DESCRIPTION OF INVENTION
According to the invention there is provided a composite mixing bowl for an electric grinder, the bowl comprising an inner vessel and an outer vessel, the inner vessel comprising a closed bottom and a collar depending down from the bottom thereof, the inner vessel being provided with a blade or cutter assembly and the outer vessel being provided with a closure or lid, the inner vessel and outer vessel being relatively movably and easily detachably assembled together liquid tight and provided with guiding and interlocking means to guide the relative movement between them and to interlock them at predetermined locations to adjust the capacity of the bowl.
According to the invention there is also provided an electric grinder comprising a composite mixing bowl for an electric grinder, the bowl comprising an inner vessel and an outer vessel, the inner vessel comprising a closed bottom and a collar depending down from the bottom thereof, the inner vessel being provided with a blade or cutter assembly and the outer vessel being provided with a closure or lid, the inner vessel and outer vessel
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being relatively movably and easily detachably assembled together liquid tight and provided with guiding and interlocking means to guide the relative movement between them and to interlock them at predetermined locations to adjust the capacity of the bowl.
According to an embodiment of the invention, the guiding and interlocking means comprises a pair of oblong channels and two sets of spaced lateral openings provided on directly opposite sides on the outer surface of the inner vessel along the length thereof, each set of the lateral openings terminating in the respective oblong channel and a pair of protrusions provided on directly opposite sides on the inner surface of the outer vessel at the bottom thereof corresponding to each of the channels and each of the two sets of lateral openings.
According to an embodiment of the invention, each of the two sets of lateral openings on the inner vessel comprises three lateral openings.
According to an embodiment of the invention, the inner vessel is provided with a circumferential groove externally at the mouth thereof and the inner vessel and outer vessel are assembled together liquid tight by locating a
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gasket such as O-ring in the groove against the inner surface of the outer vessel.
The following is a detailed description of the invention with reference to the accompanying drawings, in which :
Figs 1 and 2 are elevations of a composite mixing bowl for an electric grinder according to an embodiment of the invention at its minimum capacity and maximum capacity, respectively;
Fig 3 is enlarged view at X in Fig 2; and
Fig 4 is exploded view of the mixirig bowl of Figs 1 and 2;
The composite mixing bowl 1 as illustrated in Figs 1 to 4 of the accompanying drawings comprises an inner vessel 2 and an outer vessel 3. The inner vessel comprises a closed bottom 2a and a collar 2b depending down from the bottom thereof. The collar is adapted to be detachably fitted in a corresponding collar (not shown) on the housing (not shown) of an electric grinder (not shown). The inner vessel is provided with a blade or
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cutter assembly 4 of known construction working in known manner. The adaptation of the collar 2b for detachably fitting it in a corresponding collar on the electric grinder housing and details of the grinder housing and its collar, details of the blade or cutter assembly and details of the electric grinder have not been illustrated and described as such are not necessary for understanding the invention. 5 is a closure or lid for the outer vessel. A pair of oblong channels 6,6 are provided on directly opposites sides on the outer surface of the inner vessel along the length thereof. Two sets of spaced lateral openings 7a, 7b and 7c are provided on directly opposites sides on the outer surface of the inner vessel spaced along the length thereof. Each set of the lateral openings terminate into the respective oblong channel. A pair of protrusions is 8, 8 are provided on the inner surface of the outer vessel at the bottom thereof corresponding to each of the channels and each of the two sets of lateral openings. The inner vessel is provided with a circumferential groove 9 externally at the mouth thereof (Fig 9) and 10 is a gasket such as O-ring located in the groove.
The inner vessel and outer vessel are easily assembled together by aligning the outer vessel with the inner yessel from the bottom of the inner vessel and also aligning the protrusions 8 on the outer vessel with the channels 6 on
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the inner vessel and sliding the outer vessel up onto the inner vessel with the protrusions engaged and guided in the channels. The vessels are slidable relatively and their sliding movement is guided by the protrusions engaged in the channels. As the outer vessel slides up or down on the inner vessel, the inner surface of the outer vessel presses against the gasket which establishes a liquid tight joint between the inner and outer vessels. In order to adjust the capacity ie volume of the bowl to minimum, the outer vessel is moved down on the inner vessel to align the protrusions on directly opposite sides on the outer vessel with the lateral openings 7a on directly opposites sides on the inner vessel and then the outer vessel is rotated clockwise on the inner vessel when the protrusions enter the lateral openings 7a and interlock the vessels together. In order to release the outer vessel from the inner vessel, the outer vessel is rotated on the inner vessel anticlockwise to disengage the protrusions from the lateral openings 7a. In order to adjust the bowl to the next capacity ie volume the outer vessel is moved up on the inner vessel and the protrusions are aligned with lateral openings 7b. On rotating the outer vessel on the inner vessel anticlockwise the protrusions enter the lateral openings 7b and interlock the vessels together. The outer vessel is unlocked from the inner vessel by rotating the outer vessel on the inner vessel anticlockwise and disengaging the protrusions from the lateral
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openings 7b. In order to achieve maximum capacity ie volume of the bowl, the outer vessel is further moved up on the inner vessel and the protrusions are aligned with the lateral openings 7c. To interlock and unlock the outer vessel on the inner vessel it is rotated on the inner vessel clockwise and anticlockwise as described earlier.; The vessels can be easily detached from each other by sliding them relatively and disengaging the protrusions from the channels from the bottom end of the channels. The relative movement of the vessels is properly guided and balanced as there are two protrusions on directly opposites sides on the inner surface of the outer vessel which are located and guided in correspondingly placed channels on the outer surface of the inner vessel. The interlocking between the vessels is also effective as the protrusions are engaged in lateral openings at directly opposite sides on the outer surface of the inner vessel.
The composite bowl can be made of metallic materials such as stainless steel or aluminium or food grade hard plastics such as polyethylene.
According to the invention the composite bowl capacity or volume can be varied or adjusted to facilitate grinding or mixing of different quantities of food articles or foodstuffs in the same bowl without using bowls of
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correspondingly different capacities. The bowl as illustrated in the drawings can be adjusted to three different capacities or volumes and can be used as a single substitute bowl for three bowls of different capacities. The composite bowl is, therefore, easy and convenient to use and is cost saving and economical. The composite bowl can be stored in its assembled state thereby reducing the storage space requirement. It can be easily dissembled for purposes like cleaning or change of gasket and can be easily assembled together. It is, therefore, user friendly and easy to maintain.
The invention is essentially in the composite bowl whose capacity or volume can be varied or adjusted to facilitate grinding or mixing of different quantities of food articles or foodstuffs in the same bowl without using bowls of correspondingly different capacities or volumes. The composite bowl can comprise more than two vessels in telescopic configuration and can be optionally provided with a handle. There can be more than three lateral openings to achieve corresponding number of capacity or volume adjustments. The channel and lateral openings on the outer surface of the inner vessel and protrusion on the inner surface of the outer vessel can be interchanged and can be provided on the outer vessel inner surface and inner vessel outer surface respectively. The protrusion can be at the top of
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the inner surface of the outer vessel The guiding and interlocking means can be of a different construction. The closure or lid construction / configuration can be different. The electric grinder comprising the composite bowl can be used for grinding or mixing any other solid and/or liquid items besides food articles or food items. Such variations and modifications emcompassing the basic nature of the invention are to be construed and understood to be within the scope thereof.
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claim:
1. A composite mixing bowl for an electric grinder, the bowl comprising an inner vessel and an outer vessel, the inner vessel comprising a closed bottom and a collar depending down from the bottom thereof, the inner vessel being provided with a blade or cutter assembly and the outer vessel being provided with a closure or lid, the inner vessel and outer vessel being relatively movably and easily detachably assembled together liquid tight and provided with guiding and interlocking means to guide the relative movement between them and to interlock them at predetermined locations to adjust the capacity of the bowl.
2. A composite mixing bowl as claimed in claim 1, wherein the guiding and interlocking means comprises a pair of oblong channels and two sets of spaced lateral openings provided on directly opposite sides on the outer surface of the inner vessel along the length thereof, each set of the lateral openings terminating in the respective oblong channel and a pair of protrusions provided on directly opposite sides on the inner
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surface of the outer vessel at the bottom thereof corresponding to
"i.
each of the channels and each of the two sets of lateral openings.
3. A composite mixing bowl as claimed in claim 2, wherein each of the two sets of lateral openings on the inner vessel comprises three lateral openings.
4. A composite mixing bowl as claimed in any one of claims 1 to 3, wherein the inner vessel is provided with a circumferential groove externally at the mouth thereof and the inner vessel and outer vessel are assembled together liquid tight by locating a gasket such as O-ring in the groove against the inner surface of the outer vessel.
5. An electric grinder comprising a composite mixing bowl comprising an inner vessel and an outer vessel, the inner vessel comprising a closed bottom and a collar depending down from the bottom thereof, the inner vessel being provided with a blade or cutter assembly and the outer vessel being provided with a closure or lid, the inner vessel and outer vessel being relatively movably and easily detachably assembled together liquid tight and provided
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with guiding and interlocking means to guide the relative movement between them and to interlock them at predetermined locations to adjust the capacity of the bowl.
6. An electric grinder as claimed in claim 5, wherein the guiding and interlocking means comprises a pair of oblong channels and two sets of spaced lateral openings provided on directly opposite sides on the outer surface of the inner vessel along the length thereof, each set of the lateral openings terminating in the respective oblong channel and a pair of protrusions provided on directly opposite sides on the inner surface of the outer vessel at the bottom thereof corresponding to each of the channels and each of the two sets of lateral openings.
7. An electric grinder as claimed in claim 6, wherein each of the two sets of lateral openings on the inner vessel comprises three lateral openings.
8. An electric grinder as claimed in any one of claims 5 to 7, wherein the inner vessel is provided with a circumferential groove
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externally at the mouth thereof and the inner vessel and outer vessel are assembled together liquid tight by locating a gasket such as O-ring in the groove against the inner surface of the outer vessel.
Dated this 11th day of July 2005
(Jose M A)
Agent for the Applicants
ofKhaitan&Co
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ABSTRACT
A composite mixing bowl (1) for an electric grinder. The bowl comprises an inner vessel (2) and an outer vessel (3). The inner vessel comprises a closed bottom (2a) and a collar (2b) depending down from the bottom thereof. The inner vessel is provided with a blade or cutter assembly. The outer vessel is provided with a closure or lid (5). The inner vessel and outer vessel are relatively movably and easily detachably assembled together liquid tight and provided with guiding and interlocking means (6) to guide the relative movement between them and to interlock them at predetermined locations to adjust the capacity of the bowl (Fig 1).