[001] This invention is directed to detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability. The invention can be particularly used for kitchen without restricting scope of the invention to the same.
BACKGROUND/PRIOR ART OF INVENTION
[002] Grinders have been in existence in market in different forms. The most popular MG Mixer Grinder is an appliance found in almost every kitchen or household. It uses blade for cutting at very high RPM which is not fundamentally grinding and producing a low-quality output because of the heat generated at high RPM. Wet and Dry grinders using abrasive are also available but exists as two independent products in the market. Hence, two different grinders were required for achieving the desired dry and wet grinding, and is thereby cost inclusive. [003] Now, reference may be made to the following patents:-[004] Publication No. WO2015056275 A1 discloses an improved weight less wet/dry grinder for efficient grinding of both wet food stuffs such as, rice, grains etc and dry food stuff such as, nuts, beans, coconut etc. The system includes at least two rollers made of sustainable food grade material that rotate about a vertical axis, and which causes the feed material to be flung outwardly towards a base made of sustainable food grade material. The roller and base of the wet/dry grinder can be of various profile shapes. A drum made of plastic material (food grade plastic material) having integrated handle inside which the rollers and

base are positioned and rotated for grinding the material (e.g., wet/dry material). A direct drive mechanism for directly connecting the grinding mechanism with an electric motor for providing efficient and direct driving force with respect to the grinding mechanism. An automatic water dispensing mechanism for dispensing the liquid (water) based on the batter consistency.
[005] Publication No. GB2328145 A is directed to a household multi¬purpose mixer/grinder comprising a bowl 1, a multi-purpose blade 10 mountable within the bowl on a rotatable spindle 6 and drive means capable of rotatingly driving the spindle. The multi-purpose blade comprises at least three blade arms which project outwards from a centre hub 11. A first grinding blade arm 13 co-operates with an inner grinding surface 7 of the bowl to grind material located within a grinding region bounded by the path swept out by the grinding blade arm and the inner grinding surface of the bowl. A second mixing blade arm 14 passes through said grinding region for displacing material from said grinding region. A third shredding blade 15,16 arm is spaced from said grinding region for shredding material. Preferably there are four blade arms arranged to project outwardly from the centre hub to form a crucifix, two diametrically opposed blade arms forming the grinding blade arm and the mixing blade arm, the other two diametrically opposed blade arms forming two shredding blade arms. [006] Publication No. CN200939383 Y makes a disclosure regarding utility model which relates to a multi-functional stone mill, which can smash grains, pulp soybeans and peanuts, etc. The multi-functional stone mill comprises an upper millstone which is provided with a run-through material feeding inlet; an arched variable-section concave cavity which is matched with the material feeding inlet arranged on the

lower surface of the material feeding inlet of the upper millstone; the upper millstone is rotated corresponding to the lower millstone; a circle of groove is arranged along the inner edge side of the upper surface of the lower millstone, and the material draining outlet which is connected with the groove is positioned on a side of the groove; the scattered blind milling channels, at a certain angle from the radial direction, distributed according a certain rule, not run through the edges, are opened around the blind holes of the lower surface of the upper millstone and the upper surface of the lower millstone. [007] Publication No. EP0614726 Bl makes a disclosure regarding a grinding device, in particular for working off concrete and natural stones, having a milling ring equipped with grinding elements, and recommends that the grinding elements (2) be rigidly fixed in the axial direction on the heads of screws (3) and that the screws (3) be screwed into the milling ring (1) in the axial direction and be accessible from the side of the grinding elements.
[008] The prior arts discussed hereinabove do not describe the grinder that performs both dry and wet grinding simultaneously by running both operations at similar RPM so as to have different throughput and output grain size for different spices.
[009] Hence, the present invention proposes detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which can fulfil requirements of present invention for which the same has been devised by addressing prior issues.

[0010] The principal objective of the present invention is to provide detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which obviates shortcomings of the prior art. [0011] Another object of the present invention is to provide detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which is simple in construction.
[0012] Yet another object of the present invention is to provide detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which is efficient and compact. [0013] Still another objective of the present invention is to provide detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which is cost effective and quite useful.
SUMMARY OF THE INVENTION
[0014] The invention proposes detachable stone based grinder for simultaneous dry and wet grinding with ease of cleanability which performs both dry and wet grinding in a single seamless unit by attaching a wet grinding unit. The grinder performs both dry and wet grinding simultaneously by running both operations at similar RPM and to have different throughput and output grain size for different spices. The grinder does the grinding by abrasion method instead of cutting the ingredients.
[0015] The invention involves use of different type of stones for wet and dry grinding which can be natural or abrasive or concrete stones with the use of different slots (spiral, flower, straight etc.) for the dry grinding to have required output depending mainly on type of input spices or grain size. The input flow rate of grains for optimized output (coarse, fine, medium size) of grain is maintained by means of mechanical

arrangement or by means of adjusting the RPM according to the ingredients to be ground.
[0016] This kitchen grinder uses abrasive and seamless products to
perform both dry and wet grinding. Also, it accommodates both the
5 activities simultaneously by running both operations at similar RPM. It
uses both the surfaces of the rotating abrasive disc thereby lowering down the cost to less than half of the existing dry grinder and wet grinder put together. It also saves the kitchen space by putting two products in one unit constituting a compact grinder.
10 [0017] Thus, according to this invention, there is provided detachable
stone based grinder for simultaneous dry and wet grinding with ease of cleanability comprises a wet grinder detachably coupled to a dry grinder thereunder by a coupler (18), wherein the dry grinder includes top stone (9) super imposed on bottom stone (7) with a gap
15 therebetween covered by respective cover (6, 11), wherein the top stone
is fixed and bottom stone is rotatable about motor shaft (3); the wet grinder comprises a container (20) accommodating wet stone (21) at bottom thereof supporting a plurality of cleaners (26) and roller stones (24) for grinding, in which the container of said wet grinder rotates
20 about shaft (22).
[0018] A wet grinder detachably connected to a dry grinder thereunder by a rotor (19'), wherein the dry grinder includes top stone (9) super imposed on bottom stone (7) with a gap therebetween covered by respective cover (6', 11'), wherein the top stone is fixed and bottom
25 stone is rotatable about motor shaft (3); the wet grinder comprises a
container (20) accommodating wet stone (21) at bottom thereof supporting a plurality of cleaners (26) and roller stones (24) for grinding, in which the wet grinder rotates about the rotor (19').
6

[0019] The motor shaft (3) is mounted with a motor (4) and a motor fan
(5), wherein the motor (4) is located above the motor fan (5), which are
accommodated inside body (2) mounted on base (1).
5 [0020] The body supports outer bottom cover (6, 6') housing bottom
stone (7) for dry grinding, which is held by means of stone supporter (8) at the bottom thereof.
[0021] The top stone (9) is held with the help of a holder (10) secured thereto, which is covered by means of the outer top cover (11, 11').
10 [0022] The outer top (11) and bottom cover (6) are connected to each
other by being screwed, snapfitted or threadingly fitted and the outer top (11') and bottom cover (6') are snapfitted.
[0023] A position lock pin (12) is provided for maintaining required gap between top and bottom stone (7, 9) for dry grinding in order to control
15 coarseness of dry powder and a rotating pin (17) is provided in order to
set size of the output grain.
[0024] The top and bottom stone for dry grinding are having substantially annular section and a bush (13) is placed between the motor shaft and bottom stone.
20 [0025] A brush (14) is connected to supporter of bottom stone adjacent
to outlet (15) for wiping powder between the supporter of bottom stone and outer bottom cover, in which a funnel (16) is placed at the center of dry grinder for supplying dry raw material for grinding. [0026] The container of said wet grinder rotates about shaft (22) held by
25 shaft and rotor holder (23) accommodating a rotor (19) with the
placement of said shaft at the center of the rotor, to which said coupler is detachably connected, wherein the coupler is engaged with top part of said motor shaft (3).
7

[0027] Said shaft and rotor holder is connected to multiple roller stones
(24) via respective roller pin (25) and the shaft and rotor holder is
provided in connection with atleast two cleaners (26) by respective
5 cleaner pin (27).
[0028] The roller stones and cleaners are located opposite to each other with a lid (28) supported by the shaft and rotor holder (23), in which the lid is secured to the underlying outer bottom and top cover by a rod (29).
10 [0029] The rotor (19') is held by rotor holder (23'), in which the rotor
rests on the center hole of top dry stone so as to supply dry raw material therethrough.
[0030] A lid (28') is positioned on the top of the wet grinder to allow placement of the rotor holder therethrough.
15 [0031] A funnel (16) is placed on the rotor holder above wet grinder for
supplying dry raw material for grinding to the required size, in which the ground material having coarse/fine/medium size is collected from the outlet (15), and the rotor holder is detachably connected to a ring (R) at the top thereof to fix the rotor holder in a constant position during
20 operation of grinder.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0032] Further objects and advantages of this invention will be more
apparent from the ensuing description when read in conjunction with
25 the accompanying drawings of the exemplary embodiments and
wherein:
8

Figure 1 shows:

Sectional view of detachable stone based grinder for dry and wet grinding with ease of cleanability according to present invention.

10
15
20
25
5 Figure 2 shows:
Figure 3 shows:
Sectional view of dry grinder of present
invention.
Another sectional view of detachable stone
based grinder for dry and wet grinding with
ease of cleanability in accordance with present
invention.
Figure 4 shows:
Second embodiment of present invention for
simultaneous wet and dry grinding according
to invention.
DETAIL DESCRIPTION OF THE PRESENT INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
[0033] The present invention makes a disclosure in respect of a
technology pertinent to detachable stone based grinder for
simultaneous dry and wet grinding with ease of cleanability which
performs both dry and wet grinding. Now, reference may be made to fig.
1. The grinder comprises a base (1) supporting a body (2). The body (2)
accommodates motor shaft (3) centrally. Said motor shaft is mounted
with a motor (4) and a motor fan (5), wherein the motor (4) is located
above the motor fan (5). The motor and motor fan rotate about said
shaft (3).
[0034] The body supports outer bottom cover (6) housing bottom stone (7) for dry grinding, which is held by means of stone supporter (8) at the bottom thereof.
9

[0035] In conjunction with the above, there is provision of top stone (9) super imposed on the bottom stone (7). The top stone (9) is held in position with the help of a holder (10) secured thereto. Here, the holder for top stone is covered by means of outer top cover (11).
5 [0036] The aforesaid outer top and bottom cover are connected to each
other by being screwed, snap fitted or threadingly fitted.
[0037] In addition to the above, a position lock pin (12) as shown in fig.
2 is provided for maintaining required gap between top and bottom
stone (7, 9) for dry grinding in order to control coarseness of dry
10 powder. Here, the pin is mounted on the holder of top stone.
[0038] The top and bottom stone are having substantially annular section, wherein the top stone is fixed and bottom stone is rotatable about the motor shaft (3). Also, a bush (13) is placed between the motor shaft and bottom stone as illustrated in the figure 1.
15 [0039] Further, a brush (14) is connected to supporter of bottom stone
adjacent to outlet (15). Said brush wipes the powder between the supporter of bottom stone and outer bottom cover.
[0040] A funnel (16) is placed at the center of dry grinder for supplying
dry raw material for grinding. After grinding the material to the required
20 size, the ground material having coarse/fine/medium size is collected
from the outlet (15).
[0041] A rotating pin (17) is employed in order to set size of the output grain as per the requirement.
[0042] A wet grinder is detachably positioned above the dry grinder as
25 can be seen in fig. 1 by means of a coupler (18).
10

[0043] Here, the coupler is detchably connected to rotor (19) of the wet grinder. The coupler is engaged with top part of the motor shaft (3).
[0044] Said wet grinder includes a container forming jar (20) housing
wet stone (21) at bottom thereof and rotates about shaft (22) held by
5 shaft and rotor holder (23). The shaft holder accommodates the rotor
with the placement of said shaft at the center of the rotor.
[0045] In addition to the above, said shaft holder is connected to multiple roller stones (24) via respective roller pin (25) as best seen in fig. 3.
10 [0046] Further, the shaft holder is provided in connection with atleast
two cleaners (26) by respective cleaner pin (27) as shown.
[0047] Here, the roller stones are located opposite to each other.
Further, the cleaners are also located opposite to each other. A lid (28)
as seen in fig. 3A is supported by the shaft and rotor holder (23). The
15 lid is secured to the underlying outer bottom and top cover by means
of a rod (29).
[0048] According to another aspect of the invention, both the dry and wet grinding can be carried out simultaneously with the help of a single unit of grinder.
20 [0049] Now, reference may be made to figure 4 illustrating second
embodiment of the invention. As compared to the first embodiment of grinder, shaft of wet grinder and coupler have been removed in the second embodiment of grinder.
[0050] In this grinder for simultaneous wet and dry grinding, the
25 construction/provision from bottom till dry grinder is same.
11

[0051] Now, reference may be made to fig. 4. The grinder comprises a
base (1) supporting a body (2). The body (2) accommodates motor shaft
(3) centrally. Said motor shaft is mounted with a motor (4) and a motor
fan (5), wherein the motor (4) is located above the motor fan (5). The
5 motor and motor fan rotate about said shaft (3).
[0052] The body supports outer bottom cover (6) housing bottom stone (7) for dry grinding, which is held by means of stone supporter (8) at the bottom thereof.
[0053] In conjunction with the above, there is provision of top stone (9)
10 super imposed on the bottom stone (7). The top stone (9) is held in
position with the help of a holder (10) secured thereto. Here, the holder for top stone is covered by means of outer top cover (11).
[0054] The aforesaid outer top and bottom cover (6', 11') are connected to each other preferably by being snap fitted.
15 [0055] In addition to the above, a position lock pin (12) as shown in fig.
2 is provided for maintaining required gap between top and bottom stone (7, 9) for dry grinding in order to control coarseness of dry powder. Here, the pin is mounted on the holder of top stone.
[0056] The top and bottom stone are having substantially annular
20 section, wherein the top stone is fixed and bottom stone is rotatable
about the motor shaft (3). Also, a bush (13) is placed between the motor shaft and bottom stone as illustrated in the figure 4.
[0057] Further, a brush (14) is connected to supporter of bottom stone
adjacent to outlet (15). Said brush wipes the powder between the
25 supporter of bottom stone and outer bottom cover.
12

[0058] A rotating pin (17) is employed in order to set size of the output grain as per the requirement.
[0059] A wet grinder is detachably positioned above the dry grinder as can be seen in fig. 4.
5 [0060] Said wet grinder includes a container forming jar (20) housing
wet stone (21) at bottom thereof and rotates about rotor (19') held by rotor holder (23'). The rotor holder accommodates the rotor.
[0061] In addition to the above, said rotor holder is connected to multiple roller stones via respective roller pin.
10 [0062] Further, the rotor holder is provided in connection with atleast
two cleaners by respective cleaner pin like in first embodiment.
[0063] The detachable rotor rests on the center hole of top dry stone so as to supply dry raw material therethrough.
[0064] Here, the roller stones are located opposite to each other.
15 Further, the cleaners are also located opposite to each other. A lid (28')
as shown in fig. 4A is positioned on the top of the wet grinder to allow placement of the rotor holder therethrough as best seen in fig. 4.
[0065] The outer bottom cover (6') is assembled to lid (28') by a connecting means (M) as shown.
20 [0066] A funnel (16) is placed on the rotor holder above wet grinder for
supplying dry raw material for grinding. After grinding the material to the required size, the ground material having coarse/fine/medium size is collected from the outlet (15). The rotor holder is detachably connected to a ring (R) at the top as shown. The ring fixes the rotor
25 holder in a constant stand still position during operation of grinder.
13

Operation
First Embodiment (Fig. 1): -
[0067] The funnel is used on the top of dry grinder to supply dry raw material for grinding to the required size. The same is collected from 5 the outlet (15).
[0068] For wet grinding the wet grinder is mounted on the dry grinder by means of coupler (18) as already explained under detail description. Thus, in this embodiment wet and dry grinding are carried out separately.
10 Second Embodiment (Fig. 4): -
[0069] This embodiment allows simultaneous grinding of both wet and dry materials by placing funnel at the top of whole grinder.
[0070] However, both the types of grinders can be cleaned easily owing to provision of detachability. 15 [0071] The aforediscussed design of the novel grinders give rise the following advantageous features:-
• Both Dry and Wet Grinding in one seamless appliance
• Allows simultaneous processing of Dry and Wet Grinding at same RPM
20 • No Chopping /cutting of ingredients leading to better taste
than dry/wet cutting in existing mixer grinder
• Compact
• Provides modularity i.e. 3 different model Wet, Dry and Wet & dry together
25 • Different throughput and output grain size for different spices
• Facilitates cleaning due to detachable design.
[0072] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies
14

of the appended claims) are generally intended as “open” terms (e.g.,
the term “including” should be interpreted as “including but not limited
to,” the term “having” should be interpreted as “having at least,” the
term “includes” should be interpreted as “includes but is not limited
5 to,” etc.). It will be further understood by those within the art that if a
specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of
10 the introductory phrases “at least one” and “one or more” to introduce
claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one
15 such recitation, even when the same claim includes the introductory
phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if
20 a specific number of an introduced claim recitation is explicitly recited,
those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations).
25 Furthermore, in those instances where a convention analogues to “at
least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would
15

include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B".
[0073] It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-

WE CLAIM:

A detachable stone based grinder for dry and wet grinding with ease of cleanability comprises a wet grinder detachably coupled to a dry grinder thereunder by a coupler (18), wherein the dry grinder includes top stone (9) super imposed on bottom stone (7) with a gap therebetween covered by respective cover (6, 11), wherein the top stone is fixed and bottom stone is rotatable about motor shaft (3); the wet grinder comprises a container (20) accommodating wet stone (21) at bottom thereof supporting a plurality of cleaners (26) and roller stones (24) for grinding, in which the container of said wet grinder rotates about shaft (22). A detachable stone based grinder for simultaneous dry and wet grinding comprises a wet grinder detachably connected to a dry grinder thereunder by a rotor (19'), wherein the dry grinder includes top stone (9) super imposed on bottom stone (7) with a gap therebetween covered by respective cover (6', 11'), wherein the top stone is fixed and bottom stone is rotatable about motor shaft (3); the wet grinder comprises a container (20) accommodating wet stone (21) at bottom thereof supporting a plurality of cleaners (26) and roller stones (24) for grinding, in which the wet grinder rotates about the rotor (19'). The detachable stone based grinder as claimed in claim 1 or 2 wherein the motor shaft (3) is mounted with a motor (4) and a motor fan (5), wherein the motor (4) is located above the motor fan (5), which are accommodated inside body (2) mounted on base (1).

The detachable stone based grinder as claimed in claims 1-3, wherein the body supports outer bottom cover (6, 6') housing bottom stone (7) for dry grinding, which is held by means of stone supporter (8) at the bottom thereof.
The detachable stone based grinder as claimed in claims 1-4, wherein the top stone (9) is held with the help of a holder (10) secured thereto, which is covered by means of the outer top cover
(11, 11').
The detachable stone based grinder as claimed in claims 1-5,
wherein the outer top (11) and bottom cover (6) are connected to
each other by being screwed, snap fitted or threadingly fitted and
the outer top (11') and bottom cover (6') are snapfitted.
The detachable stone based grinder as claimed in claims 1-6,
wherein a position lock pin (12) is provided for maintaining
required gap between top and bottom stone (7, 9) for dry grinding
in order to control coarseness of dry powder and a rotating pin
(17) is provided in order to set size of the output grain.
The detachable stone based grinder as claimed in claims 1-7,
wherein the top and bottom stone for dry grinding are having
substantially annular section and a bush (13) is placed between
the motor shaft and bottom stone.
The detachable stone based grinder as claimed in the claims 1-
8, wherein a brush (14) is connected to supporter of bottom stone
adjacent to outlet (15) for wiping powder between the supporter
of bottom stone and outer bottom cover, in which a funnel (16) is
placed at the center of dry grinder for supplying dry raw material
for grinding.

The detachable stone based grinder as claimed in claim 1 wherein the container of said wet grinder rotates about shaft (22) held by shaft and rotor holder (23) accommodating a rotor (19) with the placement of said shaft at the center of the rotor, to which said coupler is detachably connected, wherein the coupler is engaged with top part of said motor shaft (3).
The detachable stone based grinder as claimed in claim 1 wherein said shaft and rotor holder is connected to multiple roller stones (24) via respective roller pin (25) and the shaft and rotor holder is provided in connection with atleast two cleaners (26) by respective cleaner pin (27).
The detachable stone based grinder as claimed claim 1 wherein the roller stones and cleaners are located opposite to each other with a lid (28) supported by the shaft and rotor holder (23), in which the lid is secured to the underlying outer bottom and top cover by a rod (29).
The detachable stone based grinder as claimed in claim 2, wherein the rotor (19') is held by rotor holder (23'), in which the rotor rests on the center hole of top dry stone so as to supply dry raw material therethrough.
The detachable stone based grinder as claimed in claim 2, wherein a lid (28') is positioned on the top of the wet grinder to allow placement of the rotor holder therethrough. The detachable stone based grinder as claimed in claim 2, wherein a funnel (16) is placed on the rotor holder above wet grinder for supplying dry raw material for grinding to the required size, in which the ground material having coarse/fine/medium size is collected from the outlet (15), and the rotor holder is

detachably connected to a ring (R) at the top thereof to fix the rotor holder in a constant position during operation of grinder.