Title of Invention

SUSPENSION SYSTEM FOR VEHICLES

Abstract

Suspension system comprises of an arrangement of linkages that ensure the angle between the wheels' axes does not change throughout the range of articulation. This arrangement provides ideal control over wheel camber. The stub axles may be steerable. The system may be supported by various types of springs and dampers and it may be mounted on a variety of chassis types. This suspension system combines the advantages of existing rigid axle and independent suspension systems. It precisely controls wheel camber like a rigid axle, but allows greater independence of articulation for the pair of wheels supported by the each axle, unlike a rigid axle setup.

Full Text

FORM 2 THE PATENTS ACT 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION (See Section 10; rule 13) TITLE OF THE INVENTION Suspension System For Vehicles APPLICANTS TATA MOTORS LIMITED, an Indian company Having its registered office at Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India INVENTOR Abhimanyu Singh , an Indian National of TATA MOTORS LIMITED, An Indian company having its registered office at 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. FIELD OF INVENTION The present invention is related to the suspension system for vehicles and more particularly it relates to the suspension system for maintaining constant camber angle for vehicles. BACKGROUND OF INVENTION Vehicle suspension systems include various combinations of springs (coil, leaf, air or torsion bar), axle housing, torque arms, A-frames, anti-roll bars, stabilizers, shock absorbers etc. These components have been assembled in various combinations in an effort to produce the desired ride, handling and performance characteristics of the vehicle. Generally automotive suspension can be broadly categorized in to two types; one is rigid or non independent axle and second is independent axle. The latter offer advantages of primary unsprung weight, greater wheel travel and better packaging. However there are some limitations of the independent suspension systems, such as the problem of maintaining an optimum wheel camber. The suspension geometry is generally set up to optimize wheel camber during vehicle roll, which leads to undesired wheel tilt during pitching and during vertical displacement of the suspended vehicle. This becomes a serious problem with independent suspension systems incorporating large vertical travel of the wheels. It is important to keep the tread surface of a tyre flat on the road surface for optimum traction and performance and to reduce wear. Camber angle is critical to tire traction and to vehicle handling and performance. The suspension linkages control the camber angle. It is desirable to keep the camber angle zero or near zero at all times to optimize road handling and performance. On the other hand, wheel camber is fixed in suspensions featuring rigid axles. These systems are generally simpler and tougher than most independent suspension designs. These attributes favour their use in on road/off road heavy vehicles and utility vehicles. One of the prior art related to this invention is the swing half-axle suspension used primarily by tetra (Czech truck manufacturer) and other is Pinzgauer (off road utility vehicle of Austrian origin). According to swing half axle suspension system, the system features a central load carrying backbone tube chassis, on to which swing half axles are pivoted. This arrangement provides all round independent suspension. The vehicle superstructure is mounted on the central tube chassis. Suspension is provided by torsion bars in the case of single axle sets and leaf spring bogie type sets for twin axles. This system, though superbly suited to off road applications suffers from extreme variation of wheel camber when undergoing vertical displacement. The vehicle chassis mounting height is also limited by tyre diameter and axle hub design. Both these limitations are overcome in the proposed suspension system. OBJECTS OF INVENTION The main object of the present invention is to provide suspension system which maintains constant camber angle of the wheels. Another object of the present invention is to provide suspension system which provides better traction. Another object of the present invention is to provide suspension system which provides better tyre life. STATEMENT OF INVENTION Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said chassis member by second pivot, second arm comprises inner end and outer end with its inner end connected to the said chassis member by third pivot, first pivot has common axis with the second pivot and third pivot, A first stub axle which is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the tilt arm by eighth pivot and outer end is connected to said first stub axle by sixth pivot, A fourth arm comprises inner end and outer end with its inner end connected to said tilt arm by ninth pivot and outer end is connected to said second stub axle by seventh pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the said slider block by twelfth pivot, A second swing arm comprises inner end and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. Suspension system for vehicles in accordance with this invention, wherein said first arm and second arm are substantially equal in length and said first arm and third arm are substantially equal in length and substantially parallel and said second arm and fourth arm are substantially equal in length and substantially parallel and said first swing arm and second swing arm are equal in length. Suspension system for vehicles in accordance with this invention, wherein distance between said tenth pivot and second pivot and eleventh pivot and third pivot are substantially equal. Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said tilt arm by second pivot, second arm comprises inner end and outer end with its inner end connected to the said tilt arm by third pivot, second pivot has common axis with the third pivot, A first stub axle is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the tilt arm by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to said tilt arm by ninth pivot and outer end is connected to said second stub axle by seventh pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the slider block by twelfth pivot, A second swing arm comprises inner end and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said tilt arm by second pivot, second arm comprises inner end and outer end with its inner end connected to the said tilt arm by third pivot, second pivot has common axis with the third pivot, A first stub axle which is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the said chassis member by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to chassis member by ninth pivot and outer end is connected to said second stub axle by seventh pivot, eighth pivot has common axis with ninth pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the said slider block by twelfth pivot, A second swing arm comprises inner and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. BRIEF DESCRIPTION OF INVENTION Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said chassis member by second pivot, second arm comprises inner end and outer end with its inner end connected to the said chassis member by third pivot, first pivot has common axis with the second pivot and third pivot, A first stub axle which is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the tilt arm by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to said tilt arm by ninth pivot and outer end is connected to said second stub axle by seventh pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the said slider block by twelfth pivot, A second swing arm comprises inner end and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. In accordance with the second embodiment of the present invention; a first arm (2a) comprises inner end and outer end with its inner end connected to the tilt arm (5) through second pivot (p2) and a second arm (2b) with its inner end connected to the tilt arm (5) through a third pivot (p3). The axes of second and third pivot (p2 & p3) are co-linear. In accordance with the third embodiment of the present invention; a first arm (2a) comprises inner end and outer end with its inner end connected to the tilt arm (5) through second pivot (p2) and a second arm (2b) with its inner end connected to the tilt arm (5) through a third pivot (p3). The axes of second and third pivot (p2 & p3) are co-linear. BRIEF DESCRIPTION OF DRAWINGS Figure -1 shows link diagram of the generic system. Figure -2 shows front view of the first embodiment. Figure -3 shows top view of the first embodiment. Figure -4 shows isometric view of the first embodiment. Figure -5 shows isometric view of the tilt arm subassembly for the first embodiment. Figure -6 shows isometric view of the slider block subassembly for the first embodiment. Figure -7 shows front view of the second embodiment. Figure -8 shows top view of the second embodiment. Figure -9 shows isometric view of the second embodiment from a top perspective. Figure -10 shows isometric view of the second embodiment from a bottom perspective. Figure -11 shows isometric view of the second embodiment from a bottom perspective showing the slider block subassembly and first and second arms. Figure -12 shows front view of the third embodiment. Figure -13 shows top view of the third embodiment. Figure-14 shows isometric view of the third embodiment. DETAILED DESCRIPTION OF INVENTION Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same, Now referring to Figures 2 to 6, In accordance with the first embodiment of the present invention, suspension system comprises; a tilt arm (5) connected to a chassis member (1) through a first pivot (pi). A first arm (2a) comprises inner end and outer end with its inner end connected to the chassis member (1) through second pivot (p2) and a second arm (2b) comprises inner end and outer end with its inner end connected to the chassis member (1) through a third pivot (p3). The axes of said first, second and third pivots (pi, p2 & p3) are co-linear. A first stub axle (3a) is connected to the outer end of the said first arm (2a) through a fourth pivot (p4) and a second stub axle (3 b) is connected to the outer end of the said second arm (2b) through a fifth pivot (p5). The wheel assemblies are mounted on the said first and second stub axles (3a & 3b). The axes of the said fourth and fifth pivots (p4 & p5) are parallel with the axis of the first pivot (pi). A third arm (4a) comprises inner end and outer end with its inner end connected to the said tilt arm (5) through an eighth pivot (p8). The said outer end of the said third arm (4a) is connected to the first stub axle (3 a) through a sixth pivot (p6). The axes of the said eighth and sixth pivots (p8 & p6) are parallel to the axis of the said first pivot (pi). The said first arm (2a) and said third arm (4a) are parallel to each other and equal in length. The second, fourth, sixth and eighth pivots (p2, p4, p6 & p8) represent the vertexes of an articulated parallelogram. A fourth arm (4b) comprises inner end and outer end with its inner end connected to the said tilt arm (5) through a ninth pivot (p9). The said outer end of the fourth arm (4b) is connected to the said second stub axle (3 b) through a seventh pivot (p7). The axes of the said ninth and seventh pivots (p9 & p7) are parallel to the axis of the said first pivot (pi). The said second arm (2b) and fourth arm (4b) are parallel to each other and equal in length. The third, fifth, seventh and ninth pivots (p3, p5, p7 & p9) represent the vertexes of an articulated parallelogram. The first and second arms (2a & 2b) are equal in length. A slider block (6) is connected to the said tilt arm (5) through a sliding joint (si). The axis of the sliding joint (s1) is perpendicular to the axis of the said first pivot (pi). A first swing arm (7a) comprises inner end and outer end with its outer end connected to the said first arm (2a) through a tenth pivot (pl0). The said inner end of the said first swing arm (7a) is connected to the slider block (6) through a twelfth pivot (pi2). The axes of the tenth and twelfth pivots (pl0 & p12) are parallel to the axis of the said first pivot (pi). A second swing arm (7b) comprises inner end and outer end with its outer end connected to the said second arm (2b) through an eleventh pivot (pi 1). The said inner end of the said second swing arm (7b) is connected to the said slider block (6) through a thirteenth pivot (p13). The axes of the eleventh and thirteenth pivots (pi 1 & pi 3) are parallel to the axis of the said first pivot (p1). The said first and second swing arms (7a & 7b) are equal in length. The distance between the tenth pivot (pl0) and the second pivot (p2) is equal to the distance between the eleventh pivot (p11) and the third pivot (p3). The twelfth and thirteenth pivots (p12 & p13) are co-linear. The axis of the sliding joint (s1) is parallel to a line intersecting and perpendicular to the axes of second and twelfth pivots (p2 & pi 2). Now referring to Figures 7 to 11, In accordance with the second embodiment of the present invention; a first arm (2a) comprises inner end and outer end with its inner end connected to the tilt arm (5) through second pivot (p2) and a second arm (2b) with its inner end connected to the tilt arm (5) through a third pivot (p3). The axes of second and third pivot (p2 & p3) are co-linear. A first stub axle (3a) is connected to the outer end of the said first arm (2a) through a fourth pivot (p4) and a second stub axle (3 b) is connected to the outer end of the said second arm (2b) through a fifth pivot (p5). The wheel assemblies are mounted on the said first and second stub axles (3a & 3b). The axes of the said fourth and fifth pivots (p4 & p5) are parallel with the axis of the first pivot (pi). A third arm (4a) comprises inner end and outer end with its inner end connected to the said tilt arm (5) through an eighth pivot (p8). The said outer end of the said third arm (4a) is connected to the first stub axle (3a) through a sixth pivot (p6). The axes of the said eighth and sixth pivots (p8 & p6) are parallel to the axis of the said first pivot (pi). The said first arm (2a) and said third arm (4a) are parallel to each other and equal in length. The second, fourth, sixth and eighth pivots (p2, p4, p6 & p8) represent the vertexes of an articulated parallelogram. A fourth arm (4b) comprises inner end and outer end with its inner end connected to the said tilt arm (5) through a ninth pivot (p9). The said outer end of the fourth arm (4b) is connected to the said second stub axle (3b) through a seventh pivot (p7). The axes of the said ninth and seventh pivots (p9 & p7) are parallel to the axis of the said first pivot (pi). The said second arm (2b) and fourth arm (4b) are parallel to each other and equal in length. The third, fifth, seventh and ninth pivots (p3, p5, p7 & p9) represent the vertexes of an articulated parallelogram. The first and second arms (2a & 2b) are equal in length. A slider block (6) is connected to the said tilt arm (5) through a sliding joint (si). The axis of the sliding joint (s1) is perpendicular to the axis of the said first pivot (pi). A first swing arm (7a) comprises inner end and outer end with its outer end connected to the said first arm (2a) through a tenth pivot (pl0). The said inner end of the said first swing arm (7a) is connected to the slider block (6) through a twelfth pivot (pl2). The axes of the tenth and twelfth pivots (pl0 & p12) are parallel to the axis of the said first pivot (p1). A second swing arm (7b) comprises inner end and outer end with its outer end connected to the said second arm (2b) through an eleventh pivot (pll). The said inner end of the said second swing arm (7b) is connected to the said slider block (6) through a thirteenth pivot (pi3). The axes of the eleventh and thirteenth pivots (pi 1 & pl3) are parallel to the axis of the said first pivot (pi). The said first and second swing arms (7a & 7b) are equal in length. The distance between the tenth pivot (pl0) and the second pivot (p2) is equal to the distance between the eleventh pivot (pll) and the third pivot (p3). The twelfth and thirteenth pivots (pi2 & pi3) are co-linear. The axis of the sliding joint (s1) is parallel to a line intersecting and perpendicular to the axes of second and twelfth pivots (p2 & p12). Now referring to figure-12 to 14, In accordance with the third embodiment of the present invention; a first arm (2a) comprises inner end and outer end with its inner end connected to the tilt arm (5) through second pivot (p2) and a second arm (2b) with its inner end connected to the tilt arm (5) through a third pivot (p3). The axes of second and third pivot (p2 & p3) are co-linear. A first stub axle (3a) is connected to the outer end of the said first arm (2a) through a fourth pivot (p4) and a second stub axle (3b) is connected to the outer end of the said second arm (2b) through a fifth pivot (p5). The wheel assemblies are mounted on the said first and second stub axles (3a & 3b). The axes of the said fourth and fifth pivots (p4 & p5) are parallel with the axis of the first pivot (pi). A third arm (4a) comprises inner end and outer end with its inner end is connected to the chassis member (1) through an eighth pivot (p8). The outer end of the said third arm (4a) is connected to the said first stub axle (3 a) through a sixth pivot (p6). The axes of the eighth and sixth pivots (p8 & p6) are parallel to the axis of the first pivot (pi). The first arm (2a) and third arm (4a) are parallel to each other and equal in length. The second, fourth, sixth and eighth pivots (p2, p4, p6 & p8) represent the vertexes of an articulated parallelogram. A fourth arm (4b) comprises inner end and outer end with its inner end is connected to the chassis member (1) through a ninth pivot (p9). The outer end of the said fourth arm (4b) is connected to the second stub axle (3 b) through a seventh pivot (p7). The axes of the ninth and seventh pivots (p9 & p7) are parallel to the axis of the first pivot (pi). The second arm (2b) and fourth arm (4b) are parallel to each other and equal in length. The third, fifth, seventh and ninth pivots (p3, p5, p7 & p9) represent the vertexes of an articulated parallelogram. The first and second arms (2a & 2b) are equal in length. A slider block (6) is connected to the said tilt arm (5) through a sliding joint (si). The axis of the sliding joint (s1) is perpendicular to the axis of the said first pivot (pi). A first swing arm (7a) comprises inner end and outer end with its outer end connected to the said first arm (2a) through a tenth pivot (pl0). The said inner end of the said first swing arm (7a) is connected to the slider block (6) through a twelfth pivot (pl2). The axes of the tenth and twelfth pivots (pl0 & pl2) are parallel to the axis of the said first pivot (pi). A second swing arm (7b) comprises inner end and outer end with its outer end connected to the said second arm (2b) through an eleventh pivot (pi 1). The said inner end of the said second swing arm (7b) is connected to the said slider block (6) through a thirteenth pivot (pi3). The axes of the eleventh and thirteenth pivots (pi 1 & pi 3) are parallel to the axis of the said first pivot (pi). The said first and second swing arms (7a & 7b) are equal in length. The distance between the tenth pivot (pl0) and the second pivot (p2) is equal to the distance between the eleventh pivot (p11) and the third pivot (p3). The twelfth and thirteenth pivots (p12 & p13) are co-linear. The axis of the sliding joint (s1) is parallel to a line intersecting and perpendicular to the axes of second and twelfth pivots (p2 & pi2). This axle setup maintains a constant angle between the projections of the axes of the wheels on the plane of articulation of the system. Axis of a wheel is defined as the axis of its rotation. This ensures that the camber of the wheels can be maintained at an optimum angle suited to specific applications. The suspension may be for either front or rear, or both. It is applicable to vehicles running on wheels, tracks, skis, pontoons etc. These vehicles may be self-propelled or towed. The wheels may be steerable. The foregoing descriptions are specific embodiments of the present invention. It should be appreciated that these embodiments are described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof. WE CLAIM 1. Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said chassis member by second pivot, second arm comprises inner end and outer end with its inner end connected to the said chassis member by third pivot, first pivot has common axis with the second pivot and third pivot, A first stub axle which is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the tilt arm by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to said tilt arm by ninth pivot and outer end is connected to said second stub axle by seventh pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the said slider block by twelfth pivot, A second swing arm comprises inner end and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. 2. Suspension system for vehicles as claimed in claim 1, wherein said first arm and second arm are substantially equal in length and said first arm and third arm are substantially equal in length and substantially parallel and said second arm and fourth arm are substantially equal in length and substantially parallel and said first swing arm and second swing arm are equal in length. 3. Suspension system for vehicles as claimed in claim 1, wherein distance between said tenth pivot and second pivot and eleventh pivot and third pivot are substantially equal. 4. Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said tilt arm by second pivot, second arm comprises inner end and outer end with its inner end connected to the said tilt arm by third pivot, second pivot has common axis with the third pivot, A first stub axle is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the tilt arm by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to said tilt arm by ninth pivot and outer end is connected to said second stub axle by seventh pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the slider block by twelfth pivot, A second swing arm comprises inner end and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. 5 Suspension system for vehicles as claimed in claim 4, wherein said first arm and second arm are substantially equal in length and said first arm and third arm are substantially equal in length and substantially parallel and said second arm and fourth arm are substantially equal in length and substantially parallel and said first swing arm and second swing arm are equal in length. 6 Suspension system for vehicles as claimed in claim 4, wherein distance between said tenth pivot and second pivot and eleventh pivot and third pivot are substantially equal. 7 Suspension system for vehicles comprises; A tilt arm which is connected to the chassis member by first pivot, First arm comprises inner end and outer end with its inner end connected to the said tilt arm by second pivot, second arm comprises inner end and outer end with its inner end connected to the said tilt arm by third pivot, second pivot has common axis with the third pivot, A first stub axle which is connected to the said outer end of the said first arm by fourth pivot and a second stub axle is connected to the outer end of the said second arm by fifth pivot, A third arm comprises inner end and outer end with its inner end connected to the said chassis member by eighth pivot and outer end is connected to said first stub axle by sixth pivot, Fourth arm comprises inner end and outer end with its inner end connected to chassis member by ninth pivot and outer end is connected to said second stub axle by seventh pivot, eighth pivot has common axis with ninth pivot, A slider block which is connected to the said tilt arm through a sliding means; the axis of sliding joint is preferably perpendicular to the axis of the first pivot, A first swing arm comprises inner and outer end with its outer end connected to the said first arm by tenth pivot and inner end is connected to the said slider block by twelfth pivot, A second swing arm comprises inner and outer end with its outer end connected to the said second arm by eleventh pivot and inner end is connected to the said slider block by thirteenth pivot which is co-linear with said twelfth pivot. 8. Suspension system for vehicles as claimed in claim 7, wherein said first arm and second arm are substantially equal in length and said first arm and third arm are substantially equal in length and substantially parallel and said second arm and fourth arm are substantially equal in length and substantially parallel and said first swing arm and second swing arm are equal in length. 9. Suspension system for vehicles as claimed in claim 7, wherein distance between said tenth pivot and second pivot and eleventh pivot and third pivot are substantially equal. 10. Suspension system for vehicles as herein described with reference to accompanying drawings. ABSTRACT SUSPENSION SYSTEM FOR VEHICLES Suspension system comprises of an arrangement of linkages that ensure the angle between the wheels' axes does not change throughout the range of articulation. This arrangement provides ideal control over wheel camber. The stub axles may be steerable. The system may be supported by various types of springs and dampers and it may be mounted on a variety of chassis types. This suspension system combines the advantages of existing rigid axle and independent suspension systems. It precisely controls wheel camber like a rigid axle, but allows greater independence of articulation for the pair of wheels supported by the each axle, unlike a rigid axle setup. Fig 2

Documents:

2259-mum-2007-abstract.doc

2259-mum-2007-abstract.pdf

2259-MUM-2007-CLAIMS(AMENDED)-(10-5-2013).pdf

2259-MUM-2007-CLAIMS(AMENDED)-(27-10-2011).pdf

2259-MUM-2007-CLAIMS(MARKED COPY)-(10-5-2013).pdf

2259-mum-2007-claims.doc

2259-mum-2007-claims.pdf

2259-MUM-2007-CORRESPONDENCE(10-12-2012).pdf

2259-MUM-2007-CORRESPONDENCE(24-12-2012).pdf

2259-MUM-2007-CORRESPONDENCE(25-4-2012).pdf

2259-mum-2007-correspondence(30-11-2007).pdf

2259-MUM-2007-CORRESPONDENCE(6-8-2012).pdf

2259-MUM-2007-CORRESPONDENCE(8-11-2012).pdf

2259-mum-2007-corrrespondence-received.pdf

2259-mum-2007-description (complete).pdf

2259-mum-2007-drawings.pdf

2259-MUM-2007-FORM 13(27-10-2011).pdf

2259-mum-2007-form 18(30-11-2007).pdf

2259-mum-2007-form 8(30-11-2007).pdf

2259-mum-2007-form 9(30-11-2007).pdf

2259-mum-2007-form-1.pdf

2259-mum-2007-form-2.doc

2259-mum-2007-form-2.pdf

2259-mum-2007-form-26.pdf

2259-mum-2007-form-3.pdf

2259-MUM-2007-GENERAL POWER OF ATTORNEY(25-4-2012).pdf

2259-MUM-2007-GENERAL POWER OF ATTORNEY(27-10-2011).pdf

2259-MUM-2007-REPLY TO EXAMINATION REPORT(27-10-2011).pdf

2259-MUM-2007-REPLY TO HEARING(10-5-2013).pdf

2259-MUM-2007-SPECIFICATION(AMENDED)-(27-10-2011).pdf

2259-MUM-2007-SPECIFICATION(MARKED COPY)-(27-10-2011).pdf

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