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

FIELD OF INVENTION
The present invention generally relates to consumer appliances, in particular, a lid for kitchen appliances.
BACKGROUND OF THE INVENTION
Mixer grinders are a quintessential example of a kitchen appliance, present in almost every kitchen. Typically, a kitchen will have multiple containers for mixing and/or grinding various items, each with its own lid. Given their frequency of use on a regular basis, there is also an increased chance of damage to the lid due to accidental drop by the user, which may result in replacement of the lid. Therefore, there is a need for improved lids which are better able to withstand damage from accidental drops, and thus enhance their utility and lifespan.
SUMMARY OF THE INVENTION
In an aspect of the present invention, there is provided a lid for a container comprising (a) a dome-like shaped structure; and (b) a plurality of ribbed structures integrally disposed on the dome-like shaped structure, wherein the plurality of the ribbed structures extends from the base of the lid towards the apex of the lid.
In an aspect of the present invention, the ratio of height of the lid to height of each of plurality of ribbed structures is in the range of 1: 0.5 to 1: 0.95. In an aspect of the present invention, the plurality of the ribbed structures of the lid are of equal height.
In an aspect of the present invention, the plurality of the ribbed structures of the lid has a proximal end closer to the base of the lid and a distal end away from the base of the lid and closer to the apex of the dome-like shaped structure; the distance between any two adjacent proximal ends is greater than the distance between any two adjacent distal ends.
In an aspect of the present invention, the lid comprises a lip extending horizontally from the plane of the base of the lid; and a skirt extending vertically

downward from the plane of the base of the lid.
In an aspect of the present invention, the height of the lid is in the range of 7-30mm; and height of the plurality of ribbed structures is in the range of 5¬28mm.
In an aspect of the present invention, the lid comprises a first curvature having radius in the range of 50-500mm; a second curvature having radius in the range of 2-50mm; and a third curvature having radius in the range of 2-50mm. In an aspect of the present invention, the radial angle between any two adjacent ribbed structures of the lid in the range of 5-60°.
In an aspect of the present invention, the lid comprises a plurality of ribbed structures being in the range of 6-72.
This summary is not intended to identify the essential features of the invention nor is it intended for use in determining or limiting the scope of the claimed subject matter.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings form part of the present disclosure and are intended to be illustrative to better explain the invention and the embodiments herein, but are not to be construed as limiting the scope of the invention.
Figure 1 depicts the isometric view of the lid of the present invention, in accordance with an embodiment of the present invention.
Figure 2 depicts the top view of the lid of the present invention, in accordance with an embodiment of the present invention.
Figure 3 - 5 depicts side views of the lid of the present invention, in accordance with an embodiment of the present invention.
Figure 6a depicts the stress distribution at the underside surface of the lid of prior art as function of time when dropped, in accordance with an embodiment of the present invention.
Figure 6b depicts the stress distribution at the underside surface of the lid of the present invention as function of time when dropped, in accordance with

an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Those skilled in the art will be aware that the invention described herein is subject to variations and modifications other than those specifically described. It is to be understood that the invention described herein includes all such variations and modifications. The invention also includes all such features referred to or indicated in this specification, individually or collectively, and any and all combinations of any two or more of said features.
For convenience, before further description of the present invention, certain terms/ definitions employed in the specification should be read in light of the remainder of the disclosure and understood as by a person of skill in the art. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art.
The present invention provides a lid (1) for a container comprising (a) a dome-like shaped structure (2); and a plurality of ribbed structures (3) integrally disposed on the dome-like shaped structure (2). The plurality of the ribbed structures (3) extends from the base of the lid (1) towards the apex of the lid (1).
The radial angle (c) between any two adjacent ribbed structures (3) of the lid (1) is in the range of 5-60°. The lid (1) of the present invention comprises 6-72 ribbed structures. In a preferred embodiment, the lid (1) comprises 10-30 ribbed structures. In a more preferred structure, the lid (1) comprises 18 ribbed structures. In a preferred embodiment, the radial angle is 12-36°. In a more preferred embodiment, the radial angle is 20°.
The height (v1) of the lid (1) as measured from the base to the apex of the dome-like shaped structure (2) is in the range of the 7-60mm. In a preferred embodiment, the height of the lid (1) is 30mm. The plurality of ribbed structures (3) of the lid (1) are defined by a proximal end (4) and a distal end (5). The proximal end (4) is defined as the end closer to the base of the lid (1), while the distal end (5) is defined as the end away from the base of the lid (1). The height

(v2) of the plurality of the ribbed structures (3) is defined as the vertical distance measured between the proximal end (4) and the distal end (5) of the plurality of ribbed structures (3). The ratio of height of the lid (v1) to height of each of plurality of ribbed structures (v2) is in the range of 1: 0.5 to 1: 0.95. In a particular embodiment, the ratio is 1:0.93(). In an embodiment, the height of at least a sub¬set of the plurality of ribbed structures (3) is of a different height. In a preferred embodiment, the plurality of ribbed structures (3) is of equal height.
The height (v1) of the lid (1) is in the range of 7-60mm; and the height (v2) of the plurality of ribbed structures (3) is in the range of 5-58mm. In a particular embodiment, the height (v1) of the lid (1) is 30mm; and the height (v2) of the plurality of ribbed structures (3) is 28mm.
In an embodiment, the plurality of ribbed structures (3) is of zig zag shape. In another embodiment, the plurality of ribbed structures (3) is curve shaped comprising a single curve. In yet another embodiment, the plurality of ribbed structures (3) is of curve shape comprising a plurality of curves. In a preferred embodiment, the plurality of ribbed structures (3) is substantially straight in shape. Any two adjacent ribbed structures of the plurality of ribbed structures (3) are positioned relative to each other such that the distance between any two adjacent proximal ends (4) is greater than the distance between any two adjacent distal ends (5).
The lid (1) of the present invention further comprises a lip (6) around the base of the lid (1), the lip (1) extending horizontally from the plane of the base of the lid (1). The lid (1) also comprises a skirt (7) extending vertically downward from the plane of the base of the lid (1).
The lid (1) of the present invention is further characterized by a first curvature (r1); and a second curvature (r2). Each of the first (r1), and second (r2) curvature are in continuous connection with each other. In an embodiment, the radius of the first curvature (r1) is in the range of 50-500mm. In a preferred embodiment, the radius of the first curvature (r1) is 200mm. In an embodiment,

the radius of the second curvature (r2) is in the range of 2-40mm. In a preferred embodiment, the radius of the second curvature (r2) is 12mm.
In a particular implementation of the present invention, Figure 1 depicts the isometric view of the lid (1) of the present invention. As seen in Fig. 1, the lid
(1) comprises a dome-like shaped structure (2) with a plurality of ribbed
structures (3) integrally disposed on the dome-like shaped structure (2). The
plurality of the ribbed structures (3) extends from the base of the lid (1) towards
the apex of the lid (1).
Figure 2 depicts the top view of the lid (1) of the present invention. As seen in Fig. 2, the radial angle between any two adjacent ribbed structures (3) is in the range of 5-60°, the radial angle being constant between any of the adjacent ribbed structures (3) of the lid (1). In a particular implementation, the lid (1) comprises 18 ribbed structures (3), the radial ang©(c) between any two adjacent ribbed structures (3) being 20°.
Figure 3 depicts the side view of the lid (1) of the present invention. As seen in Fig. 3, the lid (1) comprises a lip (6) extending horizontally from the plane of the base of the lid (1). The lid (1) also comprises a skirt (7) extending vertically downward from the plane of the base of the lid (1). The dimensions of the lip (6) and the skirt (7) are not limiting to the purpose and functioning of the lid (1) and can vary based on the dimensions of the lid (1) and their particular utility.
Figure 4 depicts the side view of the lid (1) of the present invention. As seen in Fig. 4, the ribbed structures (3) disposed on the dome-shaped structure
(2) of the lid (1) are further characterized by their height (v2) with regard to the
height (v1) of the lid (1). The ratio of height of the lid (v1) to height of each of
plurality of ribbed structures (v2) is in the range of 1: 0.5 to 1: 0.95. In a particular
implementation, the ratio of v1 to v2 is 1:0.93.
Figure 5 depicts the side view of the lid (1) of the present invention. As seen in Fig. 5, the spherical dome radius (r1) is in the range of 50-500mm, while the curvature r2 is in the range of 2-40mm.

The technical advancement of the present invention (lid breakage resistance, particularly around the intersection of the horizontal and vertical lip of the jar lid) is achieved by the particular structural features of the lid of the present invention. Mechanistically, the superior lid breakage resistance is achieved by the particular plurality of the ribbed structures (3) disposed on the dome-shaped structure (2) of the lid (1) of the present invention. The lid (1) of the present invention is able to effectively dissipate and distribute the stress experienced by the lid, particularly at the junction of the horizontal and vertical lip of the lid (1), thereby preventing breaking of the lid.
In a particular non-limiting exemplification of the invention of the present invention, the lid (1) comprises 18 ribbed structures, with the angle between any two adjacent ribbed structures being 20°. The height (v1) of the lid is 30mm, while the height (v2) of the ribbed structures is 28mm. The first curvature (r1) (spherical dome radius) is 200mm, while the second curvature (r2) is 12mm.
Fig. 6a-b depicts the stress distribution at the undersurface of the lid when dropped from a height. Fig. 6a depicts the stress distribution on a conventional lid. As seen in Fig. 6a, for a conventional lid when dropped from a height, there is maximal stress (marked in red color) all around the intersection of the horizonal and vertical lip of the lid, which leads to a higher propensity of breakage about the intersection. In contrast, as seen in Fig. 6b, which is a stress distribution for the lid of the present invention, the stress is more effectively dissipated. In particular, the intersection of the horizonal and vertical lip of the lid experiences significantly less stress (marked in yellow), thus preventing breakage of the lid. It can also be appreciated from Fig. 6b that the dome-like shaped structure comprising the plurality of the ribbed structures experiences significantly lower stress (blue color) as compared to the conventional lid (green color). These data clearly show that the structural aspect of the lid (1) of the present invention is able to achieve significant advantages over conventional lids with regard to resistance to breakage.

ADVANTAGES OF THE PRESENT INVENTION
The structural features of the lid (1) of the present invention allows for resistance to breaking when dropped from a certain height. The resistance is realized by the provision of the plurality of the ribbed structures (3) which is able to absorb and distribute the load/ stress when dropped more effectively that a lid without such ribbed structures, thereby protecting the lid from breaking. Reference numerals:
(1) Lid for a container;
(2) Dome-like shaped structure of lid;
(3) Plurality of ribbed structures disposed on the dome-like shaped
structure of the lid;
(4) proximal end of ribbed structure;
(5) distal end of ribbed structure;
(6) jar lid lip extending horizontally from the plane of the base of the lid;
(7) jar lid lip extending vertically downward from the plane of the base of the lid;
(v1) height of the lid;
(v2) height of the ribbed structures;
(r1) first curvature of the lid;
(r2) second curvature of the lid
(c) radial angle between any two adjacent ribbed structures of the lid.

I/We claim:
1. A lid (1) for a container, said lid (1) comprising:
a. a dome-like shaped structure (2); and
b. a plurality of ribbed structures (3) integrally disposed on the
dome-like shaped structure (2),
wherein the plurality of the ribbed structures (3) extends from the base of the lid (1) towards the apex of the lid (1).
2. The lid (1) as claimed in claim 1, wherein the ratio of height of the lid (v1) to height of each of plurality of ribbed structures (v2) is in the range of 1: 0.5 to 1: 0.95.
3. The lid (1) as claimed in claim 1, wherein the plurality of the ribbed structures (3) is of equal height.
4. The lid (1) as claimed in claim 1, wherein the plurality of the ribbed structures (3) has a proximal end (4) closer to the base of the lid (1) and a distal end (5) away from the base of the lid (1) and closer to the apex of the dome-like shaped structure (2); the distance between any two adjacent proximal ends (4) is greater than the distance between any two adjacent distal ends (5).
5. The lid (1) as claimed in claim 1, comprising a lip (6) extending horizontally from the plane of the base of the lid (1); and a skirt (7) extending vertically downward from the plane of the base of the lid (1).
6. The lid (1) as claimed in claim 2, wherein height (v1) of the lid (1) is in the range of 7-60mm; and height (v2) of the plurality of ribbed structures (3)

is in the range of 5-58mm.
7. The lid (1) as claimed in claim 1 comprising a first curvature (r1) having radius in the range of 50-500mm; a second curvature (r2) having radius in the range of 2-40mm.
8. The lid (1) as claimed in claim 1, comprising a radial angle (c) between any two adjacent ribbed structures (3) in the range of 5-60°.
9. The lid (1) as claimed in claim 1, comprising a plurality of ribbed structures (3) in the range of 6-72.