Description:A FASTENING SYSTEM HAVING TWIN WASHER

FIELD OF THE INVENTION

[001] The present subject matter relates to a fastening system having a twin washer with a cut-out portion. More particularly, the present subject matter describes a cutout portion which is penetrated on the twin washer to match the shape and configuration of the protrusion in the bolt to restrict the rotation of the bolt while torqueing the nut from the opposite side.

BACKGROUND OF THE INVENTION

[002] Washers have traditionally been used to protect the joint surface from damage during the tightening process and to distribute the load under the bolt head and nut. The stress under the face of a standard hexagon headed nut can result in indentation into the surfaces in contact.

[003] Without the washer, the hexagonal headed nut tends to rub against the surface in contact, therefore it damages the surface with indentation/penetration or scratches. The washer also acts as a pre-tensioner between the arrangement, thus not allowing the nut to loosen during vibrations or jerks throughout the service life.

[004] However, washers may shift or move during the tightening process. This action affects the torque tension of the joint and can result in an inaccurate fit that will loosen or fail over time. In critical joints, even a small amount of movement can lead to disaster.
[005] For example, Figure 1, illustrates a fastening system used in a tractor wheel comprising, a rim (1) and a disc (2). Herein, four twin lugs (4) are secured to the inner periphery of the rim (1) radially. Each twin lug (4) includes two curved channels (4a) and a flange portions (4b) on both sides of a channels (4a). The flange portions (4b) are welded to the rim (1) and the channels (4a) receive a bolt (3) which passes through the lug (4) and through an aperture in the disc (2) to assemble the rim (1) and the disc (2). Herein, the bolt (3) may be inserted either from the disc side or from the twin lug side for rim and disc assembly.

[006] However, when the bolt (3) is inserted from the twin lug side, there is no provision in the existing art to lock the rotation of bolt (3) during nut (7) torqueing. Thus, a proper torqueing of nut is not achieved and this creates the risk of bolt loosening during the operation, which is a life threatening situation. Moreover, the contact of the bolt (3) with the twin lug (4) is only from three sides which leaves one side open, thus, leading the bolt to tilt in downward direction. This factor contributes to loosening of nut during functioning of the parts.

[007] Therefore, the present invention focuses on designing of a fastening system which has a twin washer with a key hole. Herein, a protrusion is provided in the bolt which restricts the rotation of the bolt when secured with the twin washer to avoid the any kind of detachment. Additionally, the proposed fastening system provides a 360-degree contact of bolt head with the washer, which results in a suitable fatigue life of the part and prevents loosening of the nut during operation.

OBJECTS OF THE INVENTION
[008] The objectives are provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. These objectives are not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[009] It is a significant object of the present invention to provide a fastening system which has a twin washer with a key hole or oblong hole.

[0010] It is the principal object of the present invention to design a cutout portion which is penetrated on the twin washer to match the shape and configuration of the protrusion in the bolt.

[0011] It is another object of the present invention to restrict the rotation of the bolt while torqueing the nut from the opposite side.

[0012] It is another object of the present invention to provide safety measures by restricting rotation.

[0013] It is another object of the present invention to provide adequate adjustments of positioning, and avoiding loosening of the bolt.

[0014] It is still another object of the present invention to provide a 360-degree contact of bolt head with the washer.

[0015] It is yet another object of the present invention to provide safe support to the bolts placed on a twin lug.

[0016] Objectives of the present invention are not limited to the above-mentioned problems. Other technical problems that are not mentioned will become apparent to those skilled in the art from the following description.

SUMMARY OF THE INVENTION
[0017] This summary is provided to introduce concepts related to a to a fastening system having a twin washer with a cut-out portion. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0018] The present subject matter relates to a fastening system having a twin washer with a cut-out portion. The instant invention provides fastening system comprises a twin lug, a bolt with a protrusion that is configured for fastening to the twin lug, and a twin washer configured to mount on the twin lug to fasten the bolt to the twin lug.
[0019] In one aspect the twin washer is a flat plate comprising of two symmetrical portions of curved end and flat end on periphery connected integrally by the flat end having two cut-out portion on the flat plate.
[0020] In another aspect, the cutout portion are provided at the ends of the twin washer.
[0021] In another aspect, the cutout portion matches the shape and configuration of the protrusion in the bolt.
[0022] In another aspect, the cutout portion may be an oval-shape or a keyhole shape, or oblong shape.
[0023] In another aspect, the cutout portion is configured to prevent the rotation of the bolt while torqueing from the opposite side.
[0024] In one aspect the fastening assembly for adjustably preventing rotation of a bolt comprises of the twin washer mounted on the twin lug. The twin washer has a cut out to receive the bolt. The cut-out is aligned with the twin washer with the protrusion in the bolt to form a coupling and the nut torqued from the opposite side. The cutout portion is configured to prevent the rotation of the bolt while torqueing the nut from the opposite side.
[0025] To further understand the characteristics and technical contents of the present subject matter, a description relating thereto will be made with reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit the scope of the present subject matter.
[0026] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0027] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description outlines with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter is now described, by way of example, and with reference to the accompanying figures, in which

[0028] Figure 1 illustrates a prior art fastening system having a plain washer in accordance with an embodiment of the present disclosure;
[0029] Figure 2 (a) illustrates a twin washer having a cutout portion in accordance with an embodiment of the present disclosure;
[0030] Figure 2 (b) illustrates a bolt having protrusion in accordance with an embodiment of the present disclosure;
[0031] Figure 3 (a, b) illustrates a positioning of the twin washer in accordance with an embodiment of the present disclosure; and
[0032] Figure 4 illustrates different shape configuration of the twin washer in accordance with an embodiment of the present disclosure.

[0033] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE INVENTION
[0034] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to panel all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[0035] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to panel all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0036] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to panel a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.

[0037] The present invention discloses a fastening system (100) comprising of a twin lug (4), a bolt (3) with a protrusion (3a) configured for fastening to the twin lug (4) and a twin washer (5) configured to mount on the twin lug (4) to fasten the bolt (3) to the twin lug (4). The twin washer (5) is a flat plate comprising of two symmetrical portions of curved end and flat end on periphery connected integrally by the flat end. The twin washer (5) includes a plurality of cutout portion (5a).

[0038] Figure 2 (a) refers to a twin washer (5) having a cutout portion (5a). Herein, a fastening system (100) comprises, a twin lug (4) fastened with a bolt (3) having a protrusion (3a) and a twin washer (5) configured to mount on the twin lug (4) which provides support to fasten the bolt (3) to the twin lug (4).

[0039] In an aspect, the twin washer (5) is a flat plate comprising of two symmetrical portions of curved end and flat end on periphery connected integrally by the flat end forming a bone shaped structure.

[0040] In an aspect, the twin washer (5) has two voids with a cutout portion (5a).

[0041] Figure 2 (b) refers to the bolt (3) having the protrusion (3a). Herein, the bolt (3) has the protrusion (3a) for locking.
[0042] In an aspect, the bolt (3) is typically designed with a specific type of protrusion (3a) configured on the head or shank of the bolt (3). The protrusion (3a) provides a locking mechanism to prevent the bolt (3) from loosening or rotating.
[0043] In an aspect, the bolt (3) has a unique head shape or pattern that requires a special tool to install or remove them. Herein, the protrusion (3a) on the head of the bolt (3) may be a pin, a raised area, or a unique shape that prevents standard tools from being used.
[0044] In an aspect, when the bolt (3) is inserted from the disc side, a protrusion (3a) on the bolt (3) rests in the key-shaped contour (2a) of the disc (2), resulting in locking of bolt rotation. Thus, preventing the rotation of bolt (3) while torqueing the nut (7) from the opposite side.
[0045] In an aspect, the protrusion (3a) in a bolt (3) is provided for fastening the twin washer (5) to a twin lug (4). The cutout portion (5a) penetrated on the twin washer (5) is designed to match the shape and configuration of the protrusion (3a) in the bolt (3).

[0046] Figure 3 (a, b) illustrates a positioning of the twin washer in accordance with an embodiment of the present disclosure. An assembly for fastening and using the system of the twin washer (5) with the cutout portion (5a) for preventing rotation of the bolt (3) comprises of mounting and matching with the protrusion (3a).
[0047] In an aspect, the twin washer (5) is mounted on the twin lug (4) wherein the twin washer (5) has a cut out portion (5a) to receive the bolt (3). The cut-out (5a) is aligned with the twin washer (5) with the protrusion (3a) in the bolt (3) to form a coupling. The nut (7) is torqued from the opposite side as the cutout portion (5a) is configured to prevent the rotation of the bolt (3) while torqueing the nut (7) from the opposite side.
[0048] In the present embodiment, the twin washer (5) is first placed over the end of the bolt (3) with the key-shaped cut-out (5a) lined up with the protrusion (3a). The bolt (3) is then inserted through the twin lug (4) side and through the components being fastened together. Finally, the nut (7) is threaded onto the end of the bolt (3) and tightened to the suitable torque.
[0049] In an aspect, during installation, the key-shaped cut-out portion (5a) of the twin washer (5) is secured with the protrusion (3a) on the bolt (3). Thus, preventing the rotation of bolt (3) while torqueing the nut (7) from the opposite side which in turn prevents the rotation of the bolt (3) to avoid damage or misalignment.
[0050] Figure 4 illustrates different shape configuration of the twin washer (5) in accordance with an embodiment of the present disclosure.
[0051] In an aspect, the cutout portion (5a) may be an oval-shape or a keyhole shape. Herein, the different shape configuration of the cutout portion (5a) prevent the rotation of the bolt (3) while torqueing the nut (7) from the opposite side.
Advantages
[0052] The proposed fastening system (100) is having several technical advantages;
• The proposed fastening system (100) provide safety measures by restricting rotation.
• The proposed fastening system (100) ensures a rigid structure.
• The proposed fastening system (100) is provided with a proper locking structure which increases longevity of the system.
• The proposed fastening system (100) provides 360? support to the bolt, thus avoiding damage to the structure.
It will be appreciated that variants of the above-disclosed and other features and functions, or alternatives thereof, may be combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.

It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various systems that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.

Although embodiments for the present subject matter have been described in language specific to package features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/device of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to panel all such modifications and adaptations which fall within the scope of the present subject matter.

It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies 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 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 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 particular claim containing such introduced claim recitation to inventions containing only one 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 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). Furthermore, in those instances where a convention analogous 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 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.”

It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.

, Claims:We Claim:
1. A fastening system (100) comprising;
? a twin lug (4);
? a bolt (3) with a protrusion (3a) configured for fastening to the twin lug (4); and
? a twin washer (5) configured to mount on the twin lug (4) to fasten the bolt (3) to the twin lug (4),
wherein the twin washer (5) is a flat plate comprising of two symmetrical portions of curved end and flat end on periphery connected integrally by the flat end having two cut-out portion (5a) on the flat plate.
2. The fastening system (100) as claimed in claim 1, wherein the cutout portion (5a) are provided at the ends of the twin washer (5).
3. The fastening system (100) as claimed in claim 1, wherein the cutout portion (5a) matches the shape and configuration of the protrusion (3a) in the bolt (3).
4. The fastening system (100) as claimed in claim1, wherein the cutout portion (5a) may be an oval-shape or a keyhole shape, or oblong shape.
5. The fastening system (100) as claimed in the claim 1, wherein the cutout portion (5a) is configured to prevent the rotation of the bolt (3) while torqueing from the opposite side.
6. A fastening assembly (100) for adjustably preventing rotation of a bolt (3) comprising;
? a twin washer (5) mounted on a twin lug (4) wherein the twin washer (5) has a cut out (5a) to receive the bolt (3);
? the cut-out (5a) aligned with the twin washer (5) with a protrusion (3a) in the bolt (3) to form a coupling; and
? a nut (7) torqued from the opposite side wherein the cutout portion (5a) is configured to prevent the rotation of the bolt (3) while torqueing the nut (7) from the opposite side.

Dated this 10th day of March, 2023

SONAL MISHRA
PATENT AGENT
IN/PA – 3929
OF L. S. DAVAR & CO.,
APPLICANT’S AGENT