FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
AND
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
TITLE OF THE INVENTION A BUSH ASSEMBLY FOR A VEHICLE
APPLICANT(S)
TATA MOTORS LIMITED
an Indian Company
Bombay house, 24 Homi Mody Street,
Hutatma Chowk, Mumbai 400 001,
Maharashtra, INDIA.
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD OF THE INVENTION
[0001] Present invention, in general, relates to a bush assembly. Particularly, but not exclusively, the present invention relates to the bush assembly for a vehicle suspension.
BACKGROUND OF THE INVENTION
[0002] Conventionally, in a vehicle suspension system, rubber bush assemblies are provided at pivot joints configured for connecting a suspension link to a vehicle chassis to isolate vibrations transmitted to the vehicle chassis. Typically, these rubber bush assemblies includes an outer rubber bush and an inner metallic sleeve. This assembly of the rubber bushes permits the suspension link to pivot with respect to a vehicle body while the outer rubber bush acts as a dampener to isolate the vibrations occurring at the vehicle wheels and further, also attenuates transmission of the vibrations to the vehicle body.
[0003] In a typical pivot bush assembly, the outer rubber bush is directly bonded to the inner metal sleeve. Thus, when a suspension link of the vehicle suspension is rotated, a high torsional contact stress is generated at a rubber bonding surface region formed between the outer rubber bush and the metal sleeve. This leads to the rubber bush and the inner metal separation. Furthermore, since a torsional moment of the rubber bush is transferred on the metal sleeve, the rubber bush assembly, generally, slips with respect to a plurality of suspension joining members. This leads to joint failure, and thus entails a high cost and frequent replacement of the rubber bush assembly.
[0004] Present invention is directed to overcome one or more limitations stated above or any other limitations associated with the known arts.

SUMMARY OF THE INVENTION
[0005] One or more shortcomings of the prior art are overcome by a system as claimed and additional advantages are provided through the device and a system as claimed in the present invention. Additional features and advantages are realized through the techniques of the present invention. Other embodiments and aspects of the invention are described in detail herein and are considered a part of the claimed invention.
[0006] In one non-limiting embodiment of the invention, a bush assembly for a vehicle includes an outer damping member, a resilient member fixedly secured to the outer damping member. The resilient member includes a predetermined tapered structure formed integrally with an inner surface thereof along its predefined vertical bisecting region. The bush assembly further includes an inner sleeve coupled to the resilient member. The inner sleeve includes a pair of opposite metallic sleeves securely locked together. Each of the pair of opposite metallic sleeves includes a predefined tapered profile conforming to the predetermined tapered structure in a manner that a larger cross-sectional edges thereof abuts against both ends of the resilient member for causing rotation of said resilient member about a predefined central axis and restricting movement thereof along a predefined linear axis.
[0007] In an embodiment, the outer damping member is an elastomer such as a rubber member including a predefined profile.
[0008] In an embodiment, the resilient member is a polymer sleeve including the predetermined tapered structure extending along its said predefined vertical bisecting region. The predetermined tapered structure includes a predefined diminishing cross-section from a predetermined centre axis towards its opposite edges.

[0009] In an embodiment, the predefined vertical bisecting region is defined along a bisecting axis. The bisecting region extends along a length of the resilient member.
[0010] In an embodiment, each of the pair of opposite metallic sleeves are configured to be securely locked together through a plurality of locking members such as dowel pins. Each of the pair of opposite metallic sleeves comprises a substantially same predefined geometric shapes and configurations. Each of the pair of opposite metallic sleeves includes a varying circumferential diameter along its length.
[0011] In another embodiment, the pair of opposite metallic sleeves includes a female tapered metallic sleeve and a male tapered metallic sleeve. The male tapered metallic sleeve includes a predefined collar configured for engaging with the female tapered metallic sleeve through a predefined counter shank integrally formed therein. The predefined counter shank corresponds to the predefined collar for securing axial alignment of the pair of opposite metallic sleeves through a step-locking, interference fitting and the like.
[0012] In an embodiment, each of the pair of opposite metallic sleeves includes a predetermined increasing cross-section from its one to other end such that a predefined cross-section of the inner sleeve is gradually reduced from outer ends towards a center region.
[0013] In an embodiment, a resilient member is bonded to the outer damping member through adhesive bonds.
[0014] In an embodiment, the inner sleeve is coupled to the resilient member through a transition fitting such that a predefined clearance is formed therebetween for causing the resilient member to rotate about a predefined central axis.

[0015] In an embodiment, the predefined tapered profile conforms to the predetermined tapered structure that creates a predefined tapered contact region between the inner sleeve and the resilient member for restricting a relative lateral motion therebetween.
[0016] In an embodiment, the inner sleeve at its ends is detachably fixed in plurality of degrees of freedom with a plurality of vehicle mounting brackets through a plurality of fastening members.
[0017] In an embodiment, the plurality of vehicle mounting brackets includes a vehicle suspension hanger-bracket.
[0018] In an embodiment, said inner sleeve includes a predetermined increased cross-section at its ends such that, upon fitment, a predefined contact surface area between the inner sleeve and the plurality of fastening members is substantially increased.
[0019] In an embodiment, said predefined tapered contact region defines a contact between said inner sleeve and the resilient member such that said contact is formed in a plurality of predefined inclined opposite directions determined from a predefined centre axis. The predefined centre axis is a line sharing a common centre axis for said inner sleeve and the resilient member.
[0020] In an embodiment, said determined plurality of predefined inclined opposite directions of the predefined tapered contact region is configured for dividing a force exerted on the bush assembly into a horizontal and vertical force component along the predefined linear axis such that said inner sleeve is subjected to the horizontal force component for significantly reducing peak force on said inner sleeve and the plurality of fastening members.
[0021] An object of the present invention is to provide an improved, simple and cost-effective bush assembly for a vehicle that is configured to facilitate an enhanced dampening characteristics, improved durability and performance,

facilitates in better preload force distribution by reducing contact stress on the plurality of suspension joining members.
[0022] Another object of the present invention is to provide a novel bush assembly for a vehicle that, upon fitment, is configured to create an increased surface area between an inner metallic sleeve and a plurality of suspension joining members. This provides an improved distribution of preload force on a vehicle chassis and the bush assembly to reduce contact stress on the plurality of suspension joining members. This also reduces risk of joint slip for the plurality of suspension joining members due to an embedment thereof.
[0023] Yet another object of the present invention is to provide an improved bush assembly that facilitates housing of an outer damping member, a tapered resilient member and an inner sleeve such that the predefined tapered contact region is formed between the resilient member and the inner sleeve. Also, the predefined tapered contact region is also referred to as frustum. Further, in an embodiment, the resilient member is bonded with the outer damping member. The inner sleeve is fitted with the resilient member through a transition fitting such that a predefined clearance is formed between the resilient member and the inner sleeve, thereby resulting in sliding of the resilient member over the inner sleeve. This results in rotation of the resilient member about a predefined central axis and thus restricts linear movement of the bush assembly. This also eliminates contact of the resilient member and outer dampening member such as a rubber bush with the suspension joining members and additionally enhances the durability over time.
[0024] Still another object of the present invention is to provide an improved bush assembly that eliminates need of conventional bimetallic bushes, sealing members, timely servicing such as lubrication for enhancing durability and performance of the bush assembly.

[0025] It is yet other object of the present invention is to provide a bush assembly disposed on the vehicle that is simple, highly durable, easily mountable and low-cost.
[0026] It is advantageous to provide the improved and simple bush assembly for a vehicle that includes a split-type metallic inner sleeve that comprises of a predefined tapered profile, and a polymer resilient member comprising of a predetermined tapered structure. The split-type metallic inner sleeve including a pair of opposite metallic sleeves is adapted to be fitted to the resilient member such that the predefined tapered profile conforms to a predetermined tapered structure of the resilient member in a manner that a larger cross-sectional edges of the split-type metallic inner sleeve abuts against both ends of the resilient member. This facilitates in rotation of the polymer resilient member about a predefined central axis, however, restricting movement thereof along a predefined linear axis, thereby significantly reducing interaction between a suspension link and wear pads of a vehicle suspension. This further improves wear pad life.
[0027] Advantageously, the present invention discloses an improved bush assembly that includes a predefined tapered contact region created between the inner sleeve and the resilient member and is configured for restricting a relative lateral motion therebetween. Additionally, the predefined tapered contact region is configured to break side forces exerted at both the ends of the bush assembly into radial and lateral components, thereby reducing the lateral force exerted on inner metal sleeve.
[0028] It is another advantage of the present invention to provide a split type inner metallic sleeve for the bush assembly including a pair of metallic opposite sleeves with a predefined tapered profile. More specifically, the split pair of metallic opposite sleeves enables ease of assembly thereof with the polymer type resilient member through an interference fitting. Furthermore, upon fitment, the predefined tapered profile of the pair of metallic opposite sleeves conforms to the predetermined tapered structure of the resilient

member. In addition, upon assembly, each of the pair of the metallic opposite sleeve is securely locked together to avoid potential axial misalignment thereof with an outer damping member of the bush assembly. This facilitates in maintaining a uniform contact region on both the pair of the metallic opposite sleeves, causing rotation of the resilient member about a predefined central axis and thereby significantly reduces wear and tear of the resilient member and outer dampening member.
[0029] In further advantage of the disclosed bush assembly, the prefined tapered profile of the inner sleeve with a larger outer edges with a higher outer diameter creates an increased surface contact area between the inner metallic sleeve and the suspension joining members. This enables improved preload distribution over the increased surface contact area and hence eliminates need of any additional hardened collars to prevent local deformation of the suspension joining members due to high contact pressure and there for preventing the joint slip or integrity.
[0030] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0031] The novel features and characteristics of the invention are set forth in the appended claims. The invention itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiments when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

[0032] Figure 1 shows perspective views of a bush assembly, in accordance with an embodiment of the present invention.
[0033] Figure. 2 illustrates an exploded view of the bush assembly of Figure 1 enlarged perspective view, in accordance with an embodiment of the present invention.
[0034] Figure. 3 illustrates a cross-sectional view of the bush assembly taken along a longitudinal axis of the bush assembly of Figure 1, in accordance with an embodiment of the present invention.
[0035] Figure. 4 illustrates an exploded cross-sectional front view of the bush assembly of the Figure 1, in accordance with an embodiment of the present invention.
[0036] Figure. 5 illustrates an exploded cross-sectional front view of the bush assembly of the Figure 1, in accordance with another embodiment of the present invention.
[0037] Figure. 6 illustrates an exploded cross-sectional perspective view of the bush assembly of the Figure 1, in accordance with another embodiment of the present invention.
[0038] Figure. 7 and Figure 8 shows a vehicle suspension system mounting on a vehicle chassis illustrating the bush assembly as per an embodiment of the present invention.
[0039] Figure. 9 shows at least one of a plurality of vehicle mounting brackets illustrating the cross-sectional view of the bush assembly and the plurality of fastening members, as per an embodiment of the present invention.

[0040] The figures depict embodiments of the invention for purposes of illustration only. one skilled in the art will readily recognize from the following description that alternative embodiments of the system and method illustrated herein may be employed without departing from the principles of the invention described herein.
DETAILED DESCRIPTION OF THE INVENTION
[0041] The foregoing has broadly outlined the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which forms the subject of the claims of the invention. It should be appreciated by those skilled in the art that, the conception and specific embodiments disclosed may be readily utilized as a basis for modifying other devices, systems, assemblies and mechanisms for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that, such equivalent constructions do not depart from the scope of the invention as set forth in the appended claims. The novel features which are believed to be characteristics of the invention, to its device or system, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present invention.
[0042] The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusions, such that a system or a device that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does

not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
[0043] Reference will now be made to the exemplary embodiments of the invention, as illustrated in the accompanying drawings. Wherever possible, same numerals have been used to refer to the same or like parts. The following paragraphs describe the present invention with reference to Figures. 1-9. It is to be noted that the disclosed bush assembly for vehicles, especially for passenger motor vehicles, commercial motor vehicles and not limited to a vehicular applications.
[0044] Figure 1 shows perspective view of a bush assembly (100), in accordance with an embodiment of the present invention. More particularly, an embodiment illustrates the bush assembly (100) for a vehicle suspension system (610) (shown in Figure 8). The bush assembly (100) is configured for dampening road vibration and its transmission to a vehicle body. In an illustrated embodiment, a predefined length of the bush assembly (100) is defined by a reference numeral FF’ and a longitudinal axis taken along the length (FF’) is indicated by a reference numeral LL’.
[0045] Figure. 2 illustrates an exploded view of the bush assembly (100) of Figure 1, in accordance with an embodiment of the present invention. In an illustrated embodiment, the bush assembly (100) includes an outer damping member (200), a resilient member (202) fixedly secured to the outer damping member (200). The bush assembly (100) further includes an inner sleeve (213) coupled to the resilient member (202). The inner sleeve (213) includes a pair of opposite metallic sleeves (201),(204) securely locked together. In an embodiment, the outer damping member (200) is an elastomer such as a rubber member including a predefined profile. In an illustrated embodiment, upon fitment, the resilient member (202) is rotatable about a predefined central axis (BB’) while the resilient member (202) is non-movable along a linear axis (AA’). This also restricts the linear motion of the bush assembly (100), thereby substantially eliminates a

frictional contact between the outer damping member (200) and a plurality of suspension joining members (601L), (601R), (605), (606) and enhances the durability of the bush assembly (100). In an illustrated embodiment, a predefined central axis (BB’) is defined as a common central axis for the outer damping member (200), resilient member (202) and the inner sleeve (213).
[0046] As illustrated, the resilient member (202) is bonded to the outer damping member (200) through adhesive bonds and said inner sleeve (213) is coupled to the resilient member (202) through a transition fitting. In an embodiment of the present invention, the disclosed inner sleeve is a split-type inner metallic sleeve that includes said pair of opposite metallic sleeves (201), (204). Each of the pair of opposite metallic sleeves (201), (204) includes said predefined tapered profile such that a higher outer diameters at its at least one edges creates an increased surface contact area between the inner sleeve (213) and a plurality of suspension joining members (601L), (601R), (605), (606)(shown in Figure 7 and Figure 8). This enables preload distribution over increased surface contact area, thereby substantially reduces local deformation to prevent joint slip.
[0047] Figure. 3 illustrates a cross-sectional view of the bush assembly (100) taken along the longitudinal axis (LL’) (shown in Figure 1) of the bush assembly (100) of Figure 1, in accordance with an embodiment of the present invention. In an illustrated embodiment, the bush assembly (100) includes the outer damping member (200) and the resilient member (202) fixedly secured to the outer damping member (200). In an illustrated embodiment, the resilient member (202) includes a predetermined tapered structure (205) formed integrally with an inner surface (212) (shown in Figure 4 and Figure 5) thereof along its predefined vertical bisecting region (214) (shown in Figure 2). As illustrated in an embodiment, each of the pair of opposite metallic sleeves (201), (204) includes a predefined tapered profile (206),(208) that conforms to the predetermined tapered structure (205) of the resilient member (202) in a manner that a larger cross-sectional edges

(E) thereof abuts against both ends of the resilient member (202) for causing rotation of the resilient member (202) about the predefined central axis (BB’) and restricting movement thereof along the predefined linear axis (AA’).
[0048] In an illustrated embodiment, the bush assembly (100) includes the predetermined tapered structure (205) that extends along said predefined vertical bisecting region (214). The predefined vertical bisecting region (214) is defined along a bisecting axis (CC’). The bisecting region (214) extends along a length (DD’) of the resilient member (202).
[0049] Further, in an illustrated embodiment, the predefined tapered profile (204), (208) conforming to the predetermined tapered structure (205) creates a predefined tapered contact region (R) between the inner sleeve (213) and the resilient member (202) for restricting a relative lateral motion therebetween. The predefined tapered contact region (R) defines a contact between said inner sleeve (213) and the resilient member (202) such that said contact is formed in a plurality of predefined inclined opposite directions (HH’), (GG’). As illustrated, a plurality of predefined inclined opposite directions (HH’), (GG’) is determined from a predefined centre axis (KK’). In an illustrated embodiment, the predefined centre axis (KK’) is a line sharing a common centre axis for said inner sleeve (213) and the resilient member (202). Furthermore, said determined plurality of predefined inclined opposite directions (HH’),(GG’) of the predefined tapered contact region is configured for equally dividing a force exerted on the bush assembly (100) into a horizontal and vertical force component along the predefined linear axis (AA’). As a result, said inner sleeve (213) is subjected to the horizontal force component for significantly reducing peak force on said inner sleeve (213) and the plurality of fastening members (608).
[0050] In an illustrated embodiment, said predefined tapered contact region (R) defines a contact between said inner sleeve (213) and the resilient member

(202) such that said contact is formed in a plurality of predefined inclined opposite directions (HH’), (GG’) determined from a predefined centre axis (KK’).The predefined centre axis (KK’) is a line sharing a common centre axis for said inner sleeve (213) and the resilient member (202).
[0051] Further, referring to an illustrated embodiment, said determined plurality of predefined inclined opposite directions (HH’),(GG’) of the predefined tapered contact region is configured for equally dividing a force exerted on the bush assembly (100) into a horizontal and vertical force component along the predefined linear axis (AA’) such that said inner sleeve (213) is subjected to the horizontal force component for significantly reducing peak force on said inner sleeve (213) and the plurality of fastening members (608).
[0052] Figure. 4 shows an exploded cross-sectional front view of the bush assembly (100) of the Figure 1 illustrating an example of the inner sleeve (213), in accordance with an embodiment of the present invention. In an illustrated embodiment, the resilient member (202) includes the predetermined tapered structure (205) formed integrally with the inner surface (212) thereof along its predefined vertical bisecting region (214). As illustrated, the predetermined tapered structure (205) a predefined diminishing cross-section from a predetermined centre axis (EE’) towards its opposite edges (300), (301). Further, the inner sleeve (213) includes the pair of opposite metallic sleeves (201), (204). The pair of opposite metallic sleeves (201), (204) includes at least a portion of an inner surface of the resilient member (209), (210) and the predefined tapered profile (206), (208). Thus, upon fitment, each of the pair of opposite metallic sleeves (201), (204) including the predefined tapered profile (206),(208) conforms to the predetermined tapered structure (205) in a manner that a larger cross-sectional edges (E) thereof abuts against both ends of the resilient member (202) for causing rotation of the resilient member (202) about a predefined central axis (BB’) (shown in Figure 2) and restricting movement thereof along the predefined linear axis (AA’). This, in addition makes the resilient

member (202) slidable with respect to the inner sleeve (213) while restricting the lateral motion of the bush assembly (100). Thus, as a result of a polymer-metal sliding contact region formed between the inner sleeve (213) and the resilient member (202), the bush assembly is not subjected to torsional shear, thereby enhancing durability of the outer damping member (200) and performance of the bush assembly (100).
[0053] In an illustrated embodiment, the predefined vertical bisecting region (214) is defined along the bisecting axis (CC’).
[0054] In an illustrated embodiment, the outer damping member (200) includes at least a portion of a semicircular cross-section (207) and at least a housing portion (211) adapted for fixedly securing the resilient member (202) with the outer damping member (200). More specifically, the resilient member (202) is bonded to the outer damping member (200) through adhesive bonds.
[0055] Further, an embodiment of the present invention illustrates an example of the inner sleeve (213). In an illustrated embodiment, the inner sleeve (213) includes the pair of opposite metallic sleeves (201), (204) including a female tapered metallic sleeve (201) and a male tapered metallic sleeve (204). The male tapered metallic sleeve (204) includes a predefined collar (400) configured for engaging with the female tapered metallic sleeve (201) through a predefined counter shank (401) integrally formed therein. Each of the pair of opposite metallic sleeves (201), (204) includes a predetermined increasing cross-section from its one to other end such that a predefined cross-section of the inner sleeve (213) is gradually reduced from outer ends (300), (301) towards a center region (303). As illustrated further, the predefined counter shank (401) corresponds to the predefined collar (400), thereby facilitating axial alignment of the pair of opposite metallic sleeves (201), (204) through a plurality of locking mechanisms such as step-locking, interference fitting and the like. Thus, as illustrated, the predetermined tapered profile (206), (208) and the plurality of locking mechanism

facilitates in a secure axial alignment of the pair of opposite metallic sleeves (201), (204) with each other. In an illustrated embodiment, the bush assembly (100) includes the predetermined tapered structure (205) that extends along said predefined vertical bisecting region (214); wherein the predetermined tapered structure (205) comprises a predefined diminishing cross-section from a predetermined centre axis (EE’) towards its opposite edges (300),(301).
[0056] Figure. 5 shows an exploded cross-sectional front view of the bush assembly (100) of the Figure 1, illustrating another example of the inner sleeve (213), in accordance with an embodiment of the present invention. In an illustrated embodiment, each of the pair of opposite metallic sleeves (201), (204) of the inner sleeve (213) is configured to be securely locked together through a plurality of locking members such as dowel pins (203). Further, as illustrated, said each of the pair of opposite metallic sleeves includes a substantially same predefined geometric shapes and configurations; and a varying circumferential diameter along its length (MM’). Moreover, said each of the pair of opposite metallic sleeves (201), (204) includes a predetermined increasing cross-section from its one to other end such that a predefined cross-section of the inner sleeve (213) is gradually reduced from outer ends (300), (301) towards a center region (303).
[0057] Figure. 6 shows an exploded cross-sectional perspective view of the bush assembly (100) of the Figure 1, illustrating another example of the inner sleeve (213), in accordance with an embodiment of the present invention. In an illustrated embodiment, the bush assembly (100) includes the outer damping member (200), the resilient member (202) and the inner sleeve (213). As illustrated, the outer damping member includes an outer surface (504) and the at least a housing portion (211), the resilient member (202) includes an outer surface (503) and the inner surface of the resilient member (212), the each of the pair of the opposite metallic sleeves of the inner sleeve (213) includes an outer surface (505) and the at least a portion of an inner

surface of the resilient member (209), (210). Further, in an illustrated embodiment, each of the pair of opposite metallic sleeves (201), (204) of the inner sleeve (213) includes a pin-receiving receptacles (501) (501). For facilitating an accurate axial alignment of the inner sleeve (213) with the resilient member (202), the pair of the opposite metallic sleeve is configured to be securely locked together through a plurality of locking members such as dowel pins (203).
[0058] Figure. 7 and Figure 8 shows a vehicle suspension system mounting on a vehicle chassis (603) illustrating the bush assembly as per an embodiment of the present invention. In an illustrated embodiment, a vehicle suspension system (610) is pivotally mounted to the vehicle chassis (603) via a pair of left and right reinforcement brackets (600L), (600R).As shown in Figure 7, the bush assembly (100) is housed in an outer metallic tube (604) of a pair of suspension mounting assemblies (601L), (601R) such that the inner sleeve (213) at its ends (300), (301) is detachably fixed with a plurality of vehicle mounting brackets (609) (shown in Figure 8) through a plurality of fastening members (608) in a manner that said predefined tapered contact region (R) (shown in Figure 3) of the bush assembly (100) restricts movement of the resilient member (202) (213) along the predefined linear axis (AA’). Referring to Figure 8, an illustrated embodiment describes the cross-sectional view of the bush assembly (100) and a plurality of fastening members (608). More particularly, as illustrated, a vehicle suspension system (610) is pivotally mounted to the vehicle chassis (603) via a pair of left and right reinforcement brackets (600L), (600R) through the bush assembly (100) and at least one fastening members including a bolt (as illustrated in Figure 8). Further, a vehicle axle (602) is connected with a plurality of suspension joining members (601L), (601R), (605), (606) through suspension links (610). The vehicle axle (602) includes the wheel hub mounting assembly (607).
[0059] Advantageously, in an illustrated embodiment of the present invention, said inner sleeve (213) includes a predetermined increased cross-section at its

ends such that, upon fitment, a predefined contact surface area between the inner sleeve (213) and the plurality of fastening members (608) is substantially increased.
[0060] Figure. 9 shows at least one of a plurality of vehicle mounting brackets (609) illustrating the cross-sectional view of the bush assembly (100) and the plurality of fastening members such as bolt (608) , as per an embodiment of the present invention. In an illustrated embodiment, As shown in Figure 7, the bush assembly (100) is housed in an outer metallic tube (604) of the plurality of suspension joining members (601L), (601R), (605), (606) such that the inner sleeve (213) at its ends (300), (301) is detachably fixed with a plurality of vehicle mounting brackets (609). In an illustrated embodiment, the inner sleeve (213) is detachably fastened through said bolt and its motion is restricted about plurality of degrees of freedom. Further, in an illustrated embodiment the plurality of suspension joining members (601L), (601R), (605), (606) includes a pair of suspension mounting assemblies (601L), (601R), a reinforcement bracket (605) and a suspension joining member (606).
[0061] An embodiment illustrates the increased surface area created between the inner sleeve (213) and a plurality of suspension joining members (601L), (601R), (605), (606) such as the plurality of vehicle mounting brackets (609). This facilitates an improved distribution of preload force on the vehicle chassis (603) and the bush assembly (100) and hence reduces contact stress on the plurality of vehicle mounting brackets (609). This also reduces risk of joint slip for the plurality of suspension joining members (601L), (601R), (605), (606) due to an embedment thereof.
Equivalents:
[0062] With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context

and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
[0063] 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."
[0064] In addition, where features or aspects of the invention are described in terms of Markush groups, those skilled in the art will recognize that the invention is also thereby described in terms of any individual member or subgroup of members of the Markush group.
[0065] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:

Reference Number Description
100 Bush assembly
200 Outer damping member
201, 204 A pair of opposite metallic sleeves
202 Resilient member
203 Dowel pins
205 A predetermined tapered structure
206, 208 A predefined tapered profile
207 At least a portion of a semicircular cross-section of the outer damping member
209, 210 At least a portion of an inner surface of the resilient member
211 At least a housing portion of a semicircular cross-section of the outer damping member
212 At least an inner surface of resilient member
213 Inner sleeve
300, 301 Outer ends of the inner sleeve
400 A predefined collar
401 A predefined counter shank
501,502 A plurality of fastener receiving holes
503 An outer surface of the resilient member
504 An outer surface of the outer damping member
505 An outer surface of each of the pair of opposite metallic sleeve
600L, 600R A pair of left and right reinforcement brackets
601L, 601R A pair of suspension mounting assemblies
602 Vehicle axle
603 Vehicle chassis
604 Metallic tube
605 Reinforcement bracket
606 Suspension joining member
607 Wheel hub mounting assembly
608 A plurality of fastening members

609 A plurality of vehicle mounting brackets
610 Vehicle suspension system
AA’ A predefined linear axis
BB’ A predefined central axis
CC’ Bisecting axis
DD’ A predefined length of the inner sleeve
E Larger cross-sectional edges of each of the predefined opposite metallic sleeves
EE’ A predetermined centre axis of the inner sleeve
FF’ A predefined length of bush assembly
GG’, HH’ A plurality of predefined inclined opposite directions
KK’ A predefined centre axis
LL’ Longitudinal axis
MM’ A predefined length of the inner sleeve

We Claim:
1. A bush assembly (100) for a vehicle, the bush assembly (100) comprising:
an outer damping member (200);
a resilient member (202) fixedly secured to the outer damping member (200), the resilient member (202) including a predetermined tapered structure (205) formed integrally with an inner surface (212) thereof; and an inner sleeve (213) coupled to the resilient member (202), the inner sleeve (213) comprising a pair of opposite metallic sleeves (201),(204) securely locked together, each of the pair of opposite metallic sleeves (201), (204) including a predefined tapered profile (206),(208) conforming to the predetermined tapered structure (205) in a manner that a larger cross-sectional edges (E) thereof abuts against both ends of the resilient member (202) for causing rotation of the resilient member (202) about a predefined central axis (BB’) and restricting movement thereof along a predefined linear axis (AA’).
2. The bush assembly (100) as claimed in claim 1, wherein the outer damping member (200) is an elastomer such as a rubber member including a predefined profile.
3. The bush assembly (100) as claimed in claim 1, wherein a predefined central axis (BB’) is defined as a common central axis for the outer damping member (200), resilient member (202) and the inner sleeve (213).
4. The bush assembly (100) as claimed in claim 1, wherein the resilient member (202) is a polymer sleeve including the predetermined tapered structure (205) extending along its predefined vertical bisecting region (214); wherein the predetermined tapered structure (205) comprises a predefined diminishing cross-section from a predetermined centre axis (FF’) towards its opposite edges (300),(301).

5. The bush assembly (100) as claimed in claim 1, wherein the predefined vertical bisecting region (214) is defined along a bisecting axis (CC’); and wherein the bisecting region (214) extends along a length (DD’) of the resilient member (202).
6. The bush assembly (100) as claimed in claim 1, wherein each of the pair of opposite metallic sleeves (201), (204) are configured to be securely locked together through a plurality of locking members such as dowel pins (203); and wherein each of the pair of opposite metallic sleeves comprises a substantially same predefined geometric shapes and configurations; and wherein each of the pair of opposite metallic sleeves (201), (204) includes a varying circumferential diameter along its length (MM’).
7. The bush assembly (100) as claimed in claim 1, wherein the pair of opposite metallic sleeves (201), (204) includes a female tapered metallic sleeve (201) and a male tapered metallic sleeve (204); wherein the male tapered metallic sleeve (204) includes a predefined collar (400) configured for engaging with the female tapered metallic sleeve (201) through a predefined counter shank (401) integrally formed therein; and wherein the predefined counter shank (401) corresponds to the predefined (401) securing axial alignment of the pair of opposite metallic sleeves (201), (204) through a step-locking, interference fitting and the like.
8. The bush assembly (100) as claimed in claim 1, wherein said each of the pair of opposite metallic sleeves (201), (204) includes a predetermined increasing cross-section from its one to other end such that a predefined cross-section of the inner sleeve (213) is gradually reduced from outer ends (300), (301) towards a center region (303).
9. The bush assembly (100) as claimed in claim 1, wherein the resilient member (202) is bonded to the outer damping member (200) through adhesive bonds.

10. The bush assembly (100) as claimed in claim 1, wherein the inner sleeve (213) coupled to the resilient member (202) through a transition fitting such that a predefined clearance is formed therebetween for causing the resilient member (202) to rotate about the predefined central axis (BB’).
11. The bush assembly (100) as claimed in claim 1, wherein the predefined tapered profile (204), (208) conforming to the predetermined tapered structure (205) creates a predefined tapered contact region (R) between the inner sleeve (213) and the resilient member (202) for restricting a relative lateral motion therebetween.
12. The bush assembly (100) as claimed in claim 1, wherein the inner sleeve (213) at its ends (300), (301) is detachably fixed with a plurality of vehicle mounting brackets (609) through a plurality of fastening members (608) such that said created predefined tapered contact region restricts movement of the resilient member (202) along the predefined linear axis (AA’).
13. The bush assembly (100) as claimed in claim 12, wherein the inner sleeve (213) is detachably fastened to said plurality of fastening members (608).
14. The bush assembly (100) as claimed in claim 12, wherein the plurality of vehicle mounting brackets (609) includes a vehicle suspension hanger-bracket.
15. The bush assembly (100) as claimed in claim 12, wherein said inner sleeve (213) includes a predetermined increased cross-section at its ends such that, upon fitment, a predefined contact surface area between the inner sleeve (213) and the plurality of fastening members (608) is substantially increased.
16. The bush assembly (100) as claimed in claim 12, wherein said predefined tapered contact region (R) defines a contact between said inner sleeve (213) and the resilient member (202) such that said contact is formed in a plurality of predefined inclined opposite directions (HH’),(GG’) determined from a

predefined centre axis (KK’); and wherein said predefined centre axis (KK’) is a line sharing a common centre axis for said inner sleeve (213) and the resilient member (202).
17. The bush assembly (100) as claimed in claim 16, wherein said determined plurality of predefined inclined opposite directions (HH’),(GG’) of the predefined tapered contact region is configured for dividing a force exerted on the bush assembly (100) into a horizontal and vertical force component such that said inner sleeve (213) is subjected to the horizontal force component for significantly reducing peak force on said inner sleeve (213) and the plurality of fastening members (608).