GB2301322A - Suspension system for automobile - Google Patents

Suspension system for automobile Download PDF

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Publication number
GB2301322A
GB2301322A GB9617233A GB9617233A GB2301322A GB 2301322 A GB2301322 A GB 2301322A GB 9617233 A GB9617233 A GB 9617233A GB 9617233 A GB9617233 A GB 9617233A GB 2301322 A GB2301322 A GB 2301322A
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GB
Grant status
Application
Patent type
Prior art keywords
arm
body
portion
suspension
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9617233A
Other versions
GB9617233D0 (en )
GB2301322B (en )
Inventor
Hiroshi Maeda
Akihiko Sakazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Yorozu Corp
YOROZU JIDOSHA KOGYO KK
Original Assignee
Subaru Corp
Yorozu Corp
YOROZU JIDOSHA KOGYO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00Pivoted suspension arms; Accessories thereof
    • B60G7/001Suspension arms, e.g. constructional features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/18Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only
    • B60G11/181Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only arranged in a plane parallel to the longitudinal axis of the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/18Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only
    • B60G11/20Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/34Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
    • B60G11/44Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also torsion-bar springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00Resilient suspensions for a single wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00Pivoted suspension arms; Accessories thereof
    • B60G7/005Ball joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00Pivoted suspension arms; Accessories thereof
    • B60G7/008Attaching arms to unsprung part of vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/10Independent suspensions
    • B60G2200/14Independent suspensions with lateral arms
    • B60G2200/142Independent suspensions with lateral arms with a single lateral arm, e.g. MacPherson type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/10Independent suspensions
    • B60G2200/14Independent suspensions with lateral arms
    • B60G2200/144Independent suspensions with lateral arms with two lateral arms forming a parallelogram
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/40Indexing codes relating to the wheels in the suspensions
    • B60G2200/46Indexing codes relating to the wheels in the suspensions camber angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/40Indexing codes relating to the wheels in the suspensions
    • B60G2200/462Toe-in/out
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00Indexing codes relating to suspension types
    • B60G2200/40Indexing codes relating to the wheels in the suspensions
    • B60G2200/464Caster angle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10Type of spring
    • B60G2202/13Torsion spring
    • B60G2202/132Torsion spring comprising a longitudinal torsion bar and/or tube
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10Mounting of suspension elements
    • B60G2204/12Mounting of springs or dampers
    • B60G2204/122Mounting of torsion springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10Mounting of suspension elements
    • B60G2204/14Mounting of suspension arms
    • B60G2204/143Mounting of suspension arms on the vehicle body or chassis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10Mounting of suspension elements
    • B60G2204/14Mounting of suspension arms
    • B60G2204/148Mounting of suspension arms on the unsprung part of the vehicle, e.g. wheel knuckle or rigid axle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/416Ball or spherical joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/43Fittings, brackets or knuckles
    • B60G2204/4302Fittings, brackets or knuckles for fixing suspension arm on the vehicle body or chassis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/61Adjustable during maintenance
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/10Constructional features of arms
    • B60G2206/124Constructional features of arms the arm having triangular or Y-shape, e.g. wishbone

Description

1 SUSPENSION SYSTEM FOR AUTOMOBILE 7, 0 2301322 The present invention rel

- ates to a suspension system for an automobile, in particular, to a suspension system tomobile having a 1 for an aut ors-on bar.

- - _y ia::)arese Ut -'.L' Model Publication No. 6127287, discloses a suspension systern having a torsicn bar whch is twisted to urge a suspension arm when a load is applied to the arm in a sulbstarittially vertical dirtcto, of an automobile body, and which, is allowed to move in a substanti.ally front to rear or longitudl.

nal directJon of 15 the body. This related art reference will hereinafter be:eferred to as the first related art reference. in this front suspension system, a front end of the torsion bar ted at the center of 'the rotation of a lower arm.

is mount In addition, a cross member is provided with a proximal 20 end of an anchor arm which is made of a spring plate and extends in a substantially lateral direction of the body. The rear end of the torsion bar is f iixed to a distal end the anchor arm. Thus, when a load 'Ls appLed to the suspension system in the substantially front to rear direction of the body, the anchor arm made of the spring -ically deforms, thereby moving the t plate elast L-orsion bar and the lower arm in the substantially longitudinal direction oil t-he body. Therefore, the riding comfort of the automobile is imr)roved.

When a load is applied to the suspension system of this type, it is necessary to prevent the rear end of the 1 contacting the cross member.

=rsion bar from direct-'LV Otherwise, the load will be transmitted from the torsion bar to the automobile body through the cross member.

Thus, the riding comfort will be degraded. Therefore, in the suspension system disclosed in the first related art reference, the rear end of the torsion bar is provided BAD ORIGINAL 7 2 with a rubber bush, ng so as to prevent the torsion bar from dirrectly COn::_;_CtInC Lhe =oss member.

Eowever, when a load is applied to the suspensJon system in the subs-tantially longitudinal direction of the body, a large reaction force takes place on 'the rubber bushing and thereby the rubber bushing is excessively worn. Therefore, the rubber bushing should have high durability. Nevertheless, if thl-P -rubber busn-,nc made of relatively hard rubber, the durab-i-'-Jtv mav be the load will be transmit - -he satisfied. Eoweve:, '. -1ted to 1_ body through the -rubber bushing and the cross member, thereby degrading the riding comfort.

Another suspersion system which is allowed to move in the substantially longitudinal direction of the body is disclosed in japanese Patent Application Laid-Open No. 57-110514. This --elated art reference will hereinafter be referred to as the second related art reference. In this front susr)ension system, supported to the body at one of a spring plate is fixed to other end of the spring plate a torsion bar. Thus, when a lower arm is rotatably position thereof. One end he lower arm, whereas the is fixed to a front end of a load is adplied to the suspension system, in the substantially front to rear direction of the body, the spring plate elastically deforms and the lower arm moves in the substantially front to rear direction of the body, thereby improving the riding comj.'- :or'- of the automobile.

The construction of such a suspension system does not have enough rigidity against a load which is applied in the lateral direction of the body of the automobile.

Thus, a bending force may be applied to 'the torsion bar.

In the suspension system disclosed in the second related art reference, to prevent such a bending force from being applied to the bar, the vicinity of a iEron, end of the torsion bar is supported to a front end of a support member extending from the cross member by a bushing. in add,'--cn, a oc,-ticn extending from the BAD ORIGINAL L - 9 3 middle to the rear end of t.-e torsi-on bar is movably suppcrted by a cylindr--Cal M=-7-bef Which is sUppcrted by "Ilus, th-s suspension system p:events Lhe cross member. a bending force from being a-:):)!.;ed to the torsion bar, thereby improving the rigidity in the lateral direction tomobile.

of the body of the au,_ Eowever, although the Support member and the cvlindrical member mav orevert a bending force 1- from being they will-I complicate the applied to the torsion bar, t 10 construction of the susoension svstem. T hu s suspersion system is difficult tc practically use.

In Japanese Patent Application Laid-Open No. 62101507, a further susr)ension system is disclosed. This - reference will hereinafter be referred to as related art 7 - C h i s the -thJ rd related art reference. suspension system, a torsion bar is supported -by a lower arm at a -plurality of positions therecJ'l so as to prevent a bending 4 9: to the torsion bar. Eowever, in force from being applied. the third related art construction of tthe lower become cc)mr)l-ca-ed.

reference, the mount-ing arm., and t.ne torsion bar will An object of the =esent invention -i S to provide a suspension system for an automobile, which prevents a bending force from, being applied to a torsion bar with a simple construction so as to improve t h e r ig idi ty in a lateral direction of the body CA' the automobile and the riding com-lert and steering stability BAD ORIGINt"'L- 1 1.1) 4 According to a aspec of the preseni invention is provided a suspens-on system for an automobile having and second pivot portions on a body for supporting suspension system, comprising a suspension arm for supporting a wheel, having first and second arm port-lons rotatably mounted on the first and second pivct portions, one of said pivot pc--ticns being disposed rearwardly of the other; a torsion bar havina one end connected to said body; and a spring plate having a proximal portion mounted on said suspension arm, and a portion connected with the other end of said torsion bar, wherein an axial line of said torsion bar is offset in a substantially lateral direction of the body from a line connecting said first and second pivot portions, whereby said other end of the torsion bar is spaced apart from the line connecting said first and second pivot portions.

The suspension arm has the two arm portions each of which is supported b the two pivoll- portions. Thus, the suspension system has enough rigidity against a load -ant f:

applied in the subs'. -ially longitudinal direction o. the body, thereby preventing a bending force from being aiDr)lied to the torsion bar with a si-,,:Dle construction.

- ied in 'he substantially front to When a load is aDD-'- rear dirrection of the body, the spring plate elast.-ic:al",,,, deforms and therety the suspension arm moves in th.1s direction. Th u s, riding the automob"le becomes comfortable.

When a load is a-2p.' ed in a subs.ant _Jally direction of the body, tthe 't-ors,.on bar 'Lw-'&-sts and thereby a suspension force as the reaction force takes place. 7- n addition, the spring plate bends and thereby an excess-,..,e bending moment is not applied to the torsion bar. Thus, the torsion bar may be constructed of a thin and short member. As a result, the riding comfort and steering s-abi,;tv is i=roved.

1.

7 ^ - - _., IAL According to a second aspect he present invention there is provided a suspension system. -for automobile, having first and second pivot portions on a body, --"or supporting said suspension system comprising a suspension arm f-or supporting a wheel and having first and second arm portions rotatably mounted on the first and second pivot portions, one of said pivot portions beinq dis-oosed rearwardly of the other; a torsion bar having one end connected to said body; a spring plate having a proximal port-on mounted on said suspension arm, and a portion connected with the other end of said torsion bar; a reference thread member arra- 71ae,-3 to connect said suspension arm and said spring plate; a cam thread member arranged substantially in parallel with said reference thread member opposite to said proximal portion of said spring plate to connect said suspension arm and said spring plate and having a drive cam portion being eccentric from a center of said cam thread member; and a follower cam portion provided on one ol- said spring plate and said suspension arm engaged with said drive cam portion to cause said spring plate to rotate with said reference thread member in a vertical direction of the body by rotating said cam thread member, so as to adjust the height of the body.

the present invention there According to a third aspect ol is provided a suspension system for automobile, having first and second pivot portions on a body for supportiLng said suspension system comprising a suspension arm for supporting a wheel and having first and second arm portions rotatably mounted on the first and second pivot portions, one of said pivo-. portions being disposed rearwardly of the other; a torsion bar havinq one end connected to said body; a spring plate having a proximal portion mounted on said suspension arm, and a portion connected with the other end of said torsion bar; at least one tightening thread member arranged to connect said first arm portion and second arm portion to said spring plate; a cam thread member arranged to connect said first arm portion, said second arm portion and said spring plate and having a drive cam portion being eccentric t-o a center of said cam thread member; one c.1 said first arm port-ion I ' 1AL r il o, 6 and second arm portion having at least one oval h---e extending in a substantially lateral direction of the body tc receive said tightening thread member; and one of said first arm. port-on and said second arm pcrt-Jon having a follower cam, po=-icn engaged with said drive cam por-- ion to cause said --,-irs,arr" portion and said second arm portion to relatively displace in a lateral direction of the body by rotating said cam thread member, so as to adjust a caster angle of the wheel.

--he present invenl:icn z.

According to a f ourth aspect of, here is provided a suspension system for auzomobile, having firs: and --ions on a body for supportJ -on second pivot port Ln_g said suspens' system comprising a suspension arm for supporting a wheel and having first and second arm portions rotatably mounted on the first and second pivot portions rotatably mounted on the first and second pivot portions which are shifted with each other in a substantially front to rear direction; a torsion bar havinq one end connected to said body; a spring plate having a proximal portion mounted on said suspension arm, and a portion connecte.d with the other end of said torsion bar; a joint holder interposed between said suspension arm and said wheel; a cam thread member connecting said suspension arm to said joint holder and having a drive cam portion being eccentric to a center of said cam, thread member; and one of said join-- holder and said suspension arm having an oval hole as a follower cam portion to be engaged with said drive cam portion to cause said join-- holder to displace in a laterla direction of the body by rotating said cam thread member, so as to adjust a camber angle of the wheel.

According eo a fifth aspect of the presen t invention there is provided a suspension system for an automobile having a crossmember across a body thereof, comprising a suspension arm for supporting a wheel and rotatably mounted on said body; a torsion bar extending in a substantially front to rear direction of the body and having one end connected with said suspension arm; a from said body in a substantially lateral spring plate extending direct.ion and having a free end portion for connecting with another end of said torsion bar, the free end connecting portion beina shifted to a lower side with respect to said cross member, 1 BAD OR 1 IGINAL 0) 1 7 wherein when a load is applied to the substantially front to rear direction, said spring plate elastically deforms, thereby allowing said suspension system to move in substantially front to rear direction; and a rubber husl-iina provided on said hc)jy supporting said spring plate so as to allow said spring plate to - to rear direction.

easily deform in the sutstantially front Fig. i is a perspective view schematically- showing a structure of a suspension system for an automobile including a spring plate; Fig. 2A is a perspective view schematically showing the structure of a first modification of the spring plate of Fig. 1; Fig. 2B is a plan view of Fig. 2P.; Fig. 2C is a sectional view taken along line IIC-IIC of Fig. 2A; Fig. 2D is a sectional view taken along line IID-IID of Fig.

2C; Fig. 3A is a perspective view schematically showing the structure of a second modification of the spring plate of Fig. 1; Fig. 3S is a view taken along line IIIIE-IIIE of F-,g. 3AI- Fig. 4 is a perspective view schematically showing a third i - the structure of the suspension system oil Pic.

modi-ficatIon c- L 1;. I Fig. 5 is a perspective view schematically showing a fourth modification of the structure of the suspension system of Fig. 1; suepsnion embodiment Fia.

Fig. 6 is a partal plan view showing the structure of a system for an automobile according to a first of the present invention; 7 's a perspective view s'c-,ow-J.-9 the structure of a suspenion system of Fig. 6; Pia. 8 is a partlal plan view showing the structure of a ile according to a first suspension system for an automob, modification of the first embodiment; Fig. 9 is a perspectve view show-'ng the structure of the suspension arm of Fig. 8r.

Fia. 10 is a i:art-ial i-j'-an v-ew the structure o,-': a 1 v\ 1 A 1 A BAD OPIr, 1 8 suspension system modification c-' the Fig. 11 _s a 13art:.a-L p-:an v-,ew show-':-,c ire structure suspension system for an auu3Tnob--to a tn--r - accmodification of the first embodiment; Fig. 12A is a view for explaining a carnber angle of a suspension system; Fig. 12B is a view 'Lor explaining a cast-er analle; Fig. 13 is a plan view the structure --f a suspens-= body of a suspension sysiemn acc-ording to a seccrid embodimeni:n the present invention; Fig. 1-4 is a perspective view showinw the structure of he suspension body of Fig. 13; for an automobile accrd-Jna to a first embodiment; 13AC) ORIGINML- 10 9 Fig. 15 is an enlarged -',an view showing a principa- t:l - - portCion of Fig. 13; 16 is a side v-'-w 'aker.

Fig. 15; 7 a: e v i e.,,; s n- th 11 structure 0 a n automobile height adjustment mechanism, where Fig. 17A. is a secticnal view taken alcric line X7IIA-XVIIA 17B; F i c. 17B -S a sectional v -i ew taken alonc 1Jne XVI-TB-X7IIE =1 F-g _ 7A', and Fig. I 77C is a sec t ional v -0 taker alonc lire 7,-7C-XV-,7C ---- Fig. 17E; Fic. 1-8 are views show-rg the structure of a caster angle adjustment mechanism, where Fic. 18A is a sectional view taken alonc llne XVIII-A- XVI-TIA cl- Fig. 18B, Fic. 18E is a sectional view taken allong line XVII- TE-XVIIIIS of Fig. 18A, and 18C is a sectional view taken along line X7;711C-XVII1C of Fig.'.118B; Fig. 19 are views showing the structure of a camber angle adjustment mechanism, where Fig. 19A is a sectional j view taken along line XIXA=Y-k of Fig. 19B, and Fig. 19B Jne is a sectonal view taken along l- X!XB-XIXE of FL9.

19A; a on) c x v I - Fic. 20 are views showing the structure of a caster angle and camber ancle adjust-ntrient mechanism. where Fig. view taken along line XXJ1-XXA of Fi 20A is a sec, g.

20B. Fig. 20B is a sectional view taken along line XXB XXB of Fig. 20A, Fig. 20C is a sectional view taken along line XXC-XXC of Fig. 20B, and Fic. 20D is a sectiona' view taken along line XXD-XXD of Fig. 20B; an ure c.

ruc.

Fig. 21 are views showing the s.

O automobile height and camber angle adjustment mechanism, where Fig. 21A is a sectional view taken along line XXIA-MIA c-E Fig. 21B, Fig. 211E is a sectional view taken along line MIB-XXTB of Fic. 21A, and Fig. 21C is a : 21E; sectional view taken along line XXIC-XXIC of F 1 22 are views showing the structure of a modification of 7_ he a u t omo b 11 e h e i 9 h t adjustment mechanism of Fig. 17, where _Fric. 22A is a sectional view BAD ORIGINAL 4 0 1 j taken along line WIMMIA of Fig. 22B, Fig. sectional view taken along line XXIIS-xxiis of and Fig. 22C is a sectional view taken along WIC-MIC of Fig. 22B; Fig. 23 22B is a F l G. 22A, line are views showing the structure of a modification of the caster angle adjustment mechanism of Fig. 18, where Fig. 23A is a sectional view taken along line XWIIA-XXIIIA of Fig. 233, Fig. 23B is a sectional view taken along line XXIIIE-XXIIIE of Fig. 23A, and Fia. 23C is a sectional view taken along line XXIIIC-XX:IIC of Fig. 233; Fig. 1 is a schematic diagram showing the construction of a principal ncrtion of a suspension system f-G-r an automobile useful in understandioq the present invention. The suspension system is used for suspending a f ront wheel on the left or right of the automobile.

BAD ORIGINAL A0.4 l 1 1 A left-side lower arm (suspension arm) Ila of Aletter shaped type is disposed on 'the left s_Jde of the automobile body. T1,e left-side lower arm l1a has a ball joint l2a disposed a. a front end thereof. The ball joint l2a is connected to a knuckle (not shown) al: a lower end portion thereof. The lower arm lia has two pivot portions 13a and 14a which are disposed in front and rear r)ositicns of a distal portion thereof. The lower arm lla is rotatable about the Divot r)crtions l3a and l4a to the bcdy of the automobile. The center axis the::)-ivot iDortons 13a and 14a extends nearly in a substantially longitudinal (or front to rear) direction of the body. A righ't-side lower arm llb is opposed to the le-Ft-side lower arm Ila and mounted on the right side of the bod,. The right-side lower arm lla -is rotatable about p4VO'.portions 13b and 14b. Likewise, the righside lower arm llb is provided with a ball joint 12b at a front end)ortion thereof.

The upper end portion of t-he knuckle is connected to 20 an upper arm (nol shown) so as to rotatably support the wheel. Each of the lower arms is connected to a lower end Dcrtion of a shock absorber. In addit-.Joi, the left - lower arms are connected with a stabilizer (not and right shown). The arms, knuckles, and so forth principally construct the suspension system which suspends the front wheels bn the left and right of the body of 'the automobile.

To the pivot portion 14a behind the left lower arm lia is fixed a front end portion of a left torsion bar 21a. Likewise, to the pivot portion l4b behind the right portion of a right Fig. 1, each center almost accords with lower arm llb is fixed a f ront end torsion bar 21b. Thus, as shown in axis of the torsion bars 21a and 21b the center axis of the pivot portion thereof To a cross member of the body is fixed a rear end each of spring plates 24a and 24b by portion 0,1 appropriate fastening means such as welding. The spring _X BAD ORGINAL pl a te center plate cente r welded spring f ront. 24b. I- h e 12 24a extends in a direction perpendicular axis of the bar 21a. Likewise, the 24b extends in a direction Derpendicular axis of the bar 21b. slee,,,e -c) a front end:)cr-"on (free end pert- J on) to the spr inc to t h e k_ 25a is cf the plate 24a. Likewise, a sleeve 25b is welded to a end portion (free end portion) of 'the spring plate The sleeve 25a is fixed to a rear- end portion off left torsion bar 2-1a. L. Ir,..ewise, sleeve 25b is f,xed to a rear end portion of' 'he rg'--- --crs-on bar 27b.

in this susiDens-cn when a load is applied to the lower arms lia and llb in the substantially longitudinal directLon of the body, the spring plates 24a and 241b bend in the arrow direction snown in Fig. Ir thereby absorbing the load. Thus, a compression stress an a a tensile stress acainst the torsi-cn bars.21a and-21b are alleviated. in addition, the torsion bars 21a and 21b do not prevent the suspension system from bending and moving in the subs tan t i?-lly longitudinal direction of the body. applied in addition, the free end portions of the spring tes 24a and 24b fixed to the rear end portlons of the plat torsion bars 21a and 21b are spaced apart from the cross member. Thus, without necessity of a rubber bushing, the suspension system can securely prevent the torsion bars 21a and 21b from directly contacting the cross member. Thus, when a load is applied thereto and It-he suspension svstem moves in this direction, the load is not transmitted to the body. As a result, 'the riding comfort is securely improved.

Figs. 2A, 2B, 2C, and 2D show a first modification of the Figur-e 1 device. In Fig - 1, the spring plates 24a and 24b are mounted on the body by welding, whereas in Fic. 2, the spring plates 24a and 24b are mounted 'LO the body with bolts.

Moreove-r, an excessive bending stress is not crsion bars 21a and 21b to each of the t BAD ORIGINAL il. reinforcement plate 41 is integrally connected to the front end portion c," the spring plate 2 4 a. Along 7orcement plat, he sp: J nc:)-ate 24a Is with the reinf -e 411, t - the body B with bclits 42 and 43.

mounted on 'L As shown in F1g. 2C, the bolt 43 has a cain portion 44 on thehead side thereof. The cam portion 44 is eccentrically formed on the bolt 43. The cam portion 44 is Ifit in an oval hole 45 formed on the reinforcement plate 41, the oval hole 45 extending in the substantially vertical direction of the body. On the other hand, the belt 42 is not eccenl-r-callv mounted. Th L' S ' the spr- ing piate 24a is slidable about the bolt 42 along with the reinforcement plate 41. Therefore, when both the bolts 42 and 43 are being loosened and then the bolt 43 is further rotated, the spring plate 24a is rotated about the belt 42 and.thereby the proxim- al portion of the spring plate 24a moves in the substantially verti.Cal direction of the body B. Consequently, the positions of the sleeve 25a can be changed with respect to the body h in the substantially vertical direction of the-bodv B. Thus, the height of the body B can be adjusted. For the sake of simplicity, Fig. 2 shows only the mounting structure of the spring --e 24a. 1 Et iDlal. Phus, the mounting structure 'o -he other_ spring plate 24b is the same as tha. of the spring plate 24a.

Figs. 3A and 33 show modification of the spring plate for the previousl,-described suspension system. A propeller shaft 47 and an exhaust pipe 48 are disposed at a center portion of the body 3 and extend in the substantially longitudinal direction thereof. A cross member 49 is disposed between the propeller shaft 47 and the exhaust pipe 48. The cross member 49 is connected to distal portions of 'the spring plates 24a and 24b with bolts.

The torsion bars 21a and 21b are respectively fixed to -he distal the sleeves 25a and 25b which are mounted on t portions of the spring plates 24a and 24b.

BAD ORIGINAL a second 1 11 - ird modification.

4 shows a 1.1h--lower arms -'s mod---icat-cr.. s z.lie sa.-.ie as that o' a an d ca, cl-., a s -, n c: 1 e embod ime n t Eowever, ir tin-'s mod----- t h e sprIng plate 24 is disposed on a cross member of.. -Jon near-,-7 body. The spr-ing plate 24 extends in a d-irec',-:De.,r)end-Jc,-,lar to the center axes c.,,r torsion bars 2-1a and Jng plate 24 21b. Thus, the spr- extends in -e --ar end ",a-era. direct on s k_he bed-,,.

- 0 por t_ons of tne twc t=s ion bars 2 1 a and both proximal por-)-,-ls Of the spring is spring plate 2n - fixed to the cress mountinc members 31 and 32.

217b are plate 24...e member with two 31 an d have a 17he mounting members are preferably of ---.!oat-nc type where they each the spring plate 24 bends in the rubbe-r ng so that J v Cudinal direc4L-'Cn c-F the bed su b s t a n -L- i a 11 1 ong it --owever, the s::)r -v ng plate 24 r,,a be mounted directly on cross member wJ.1.h metal pins or the like.

F;c. 5 shows a fourth modification In ,nis modification, as in the 'third modification shown in Fig. 4, both proximal portions of a sz)rinc niate 24 are fixed to rear end iDorLiQnS Of torsion bars 21a and 21b, respective",-;. The both r)rox-,ma.L portions of the spring plate 211 are connected to a cross member by mounting members 33 and 34. Thus, the rear end portion of the le-ft. torsion bar 21a is dis:Dcsed between the mounting members 31 and 33. The rear end portion of th, e r -i g 1- t tcrs-c)n bar 21b i S d i siDcsed between the mountIng members 32 and 34.

In the sus,)ens--n systems according to the 'third and fourth mod if icat ic-ns shown in Fics. 4 and 5, when a load is applied thereto in the substantially rear direction of the body, the spring plate 24 elastically deforms. in addition, at this noint, the portion between the two members 3-1 and 32 deforms, thereby cancellinc-:

the load applied thereto. Thus, the load applied to the body is reduced.As a result, when a load is applied to BAD ORIGINAL the suspension sysze.m, in direct-or. of the body, this direction. --,us, the subs tan - a 1 l v 1 ongJ tudinal e su s _p e n s n S _y s - en -- s -hese suspens svsems can on 1Drov;,de good ridinc comfort.

in. particular, in 'the mcd-4-FicalC--]'.ons shown in Figs. 4 and 5, the reactic.n. force by the sprinc plate 24 acainst the body at the mount-nc members can be reduced. Th us ed floatinc tbushings navinc rubber bushings as the so-ca 11 mountinc members 31 tc 34 can. be used. '-r'.here-fore, the suspension systems can sat--Jsiac-.cr bend r - -. ---i subs tantlally direction. of the body. T h e bending characler-sl.JLc in the subs tan t ially longitudinal direction of the susDension system which uses a total of four mounting members shown in Fic. 5 is superior to that -wc mounting members of- the sus-Dension system which uses t shown 'n Fic. 4.

In the abovedes c r ibed device and the modifications thereof, the front e n d --crt-ions of the torsion bars 21a and 21b are fixed to the pivot portions 14a and 14b behind the lower arms!!a a n d 1-1 1 b, respectively. T h-i s the center axes of the r) v 0 portions accord with the respective center. axes of the - accord torsion bars. Eowever, even if these axes do no'.

with each otherr, the present invention may be applied.

In this case, when the suspension system vertically moves, the front end portions of the torsion bars 21a and 21b move in the su, bs tanti, ally vertical direction of the body as the lower arms lla and llb rotate. Eowever, since the spring plates 24, 24a, and 24b elastically -ing directions, an excessive bending deform in their twist stress is not ar)tD",ied to the torsion bars 21a and 21b.

Thus, the suspension system smoothly moves in the substantially vertical direction of the body. At this point, the suspension system always moves Ln 'the same 35 path. As a result, stabillity is improved.

teering the riding comfort and st 1 13AD ORIGINAL J 16 i f a principal Fics. 6 and 7 show the constructlon c)- ---- on 0- a suspens-.. s;stern 1 0 _ an DO, 1 - - automobi,.

-ne p r e s en a cc or d ng i n ve n t i on i n these f i C u: e a sus2ens-cn a r comprises a first arm portion 51 and a second arm portion 52 which is disposed behind the f irst arm pcrticn 51. A lower end pc r t ion 0 1E a knuckle ( nct snown) which rotatably suz)z)crts a wheel, W is connected 1.3 'he arm 50 by a ba"i 1 jc)-r,-- 53. The arm _SC _s:7e-:er:-e- io as a -,c-wer armn or ',ower The arm, connects the lower end c-E the kn,,ick--e and body. T he f rst arm portior. 5 1 and th e second 52 are connected by con.necting elements 54 and which are for example bolts. The suspension arm 50 s A----tter shaped arm.

The first ar:n::)or'-ic)n 5.1 has a filst p-Jvc:)t- portion 61, Jnto which a rubber bushing 53 is fitted. The first, arm port-on 5-1 is sLr)z)c)rked to a body B by the first tion 61. Likewise, -'the second arm 62 hasa Divot port- second Divot porticr 62 into which a rubber bushing 64 's 20 fitted. The second arm portion 52 is supported to the - - I- body B by the second Divot portion 62.

The first Divot oortion 6-1 and the second pivot iDortion 62 are sDaced apart f rom each other in tth e substantially longitudinal direction of the body B. A pivot axial line P which connects the centers of ',he firs,r)ivct portion 61 and the second p-vot portion 62 extends nearly i n the substantially longitudinal direction of the body E. Now assume that Ladenotes the distance between the center of the ball joint 53 and the center of the first pivot pertion 61 in the substantially longitudinal d rection of the body B. in addition, c ist assume that Lb denotes the di ance between the center the ball join'. 53 and the center of the second portion 62 in the substantially longitudinal direction OZ the bod.; B. At this point, the relation of La < Lb is satisfied. The volume of the rubber bushing 64 is larcer a rm, 55 an.

.,.AD ORIGINAL 0 A 17 than that of the rubber bushing 63. Thus, when a Ioad is applied t C) the suspension svstem in 1, the subs tant i a, longiltudinal direction of the body E, 'the rubber bus',-,ing 64 in 'the second jivot 62 can more elastically deforrin 5 than the rubber bushing 63 in the first pivot 61 does.

A proximal portion of a spring plate 66 made of spring member material is disposed between the first iDcrt-ion 51 and t'-e second arm portion 52. T hu S ' proximal cE a arm th e the spr ng -plate 66 is Zf Ixed ing plate 56 extends i n z h e suspens-on arm 50. The sp- substantially lateral direction of the body 3. As shown in 'the figures, the spring plate 66 is connected to the two arin portions 51 and 52 by the bolts 54 and 55. However, 'the spring plate 66 may be connected to the arm pcrtions 51 and 52 by welding or rivets.

To the distal portion of the spring plate 66, is Z fixed 'Co a front end 7)ortion 72 of a torsion bar 71. A rear end portion 73 oif the torsion bar 71 is fixed to the body B. The front end portion 72 of the torsion bar 71 is connected to a sleeve 74 by a fitting element such as a sr)line. The sleeve 74 and the spring plate 66are connected bv welding or the 1:.ke so as to the front end portion of the torsion bar 71 and the spring plate 66. Likewise, the rear end portion of the torsi-on bar 71 is connected to a sleeve 75 by a fitting element such as a spline. The sleeve 75 and the body 3 are connected by welding so as to f ix the rear end portion 73 of the torsion bar 71 and the body S.

A center axis T of the torsi-on bar 71 and the pivot axial line P make an offset angle 6. The center of the first p-i,,;ct portion 61 and the center of the front end portion 72 of the tors ion bar 71 deviate in the - ion of t i a 11 v lateral direc, substan%_- the body by a - distance S.

oredetermined offset As shown in the figures, the front end portion 72 of the torsion bar 71 is mounted on the suspension arm 50 by the with the spring plate 66 w,ich extends in parallel', ALL) ORiGNA1 18 center axis T of the torsion bar 71 Thus, 'the rigidity c- h e suspeps-c,- arm 53 a 5 a 1 1-1 5 a Icad n th e subs tantially long-itudinal cf: the wheel W is low, whereas the ricidity cf t h e suspension arm so against a load in the subs tan tial!v vertical drection of the wheel W is hich.

Thus, when a load is applied to the wheel h in the substantially '-'ong.J-ud-nal direction of the body B, the front and rear rubber bushings 63 ant' 64 deform. T. hu s, the two arm portions S- and 52 share t'e load and t.nerebv n z h e substant- - t_he sus-iensicn a: im 50 d e f c) r = S 4a!',y 1 c) n 9 i t u d i na 1 direction of the body S. However I. f the e 66 i n tial ly -;gid-ity of the spring plat the substant.

longitudinal direction oil the bod.,; - is low. Thus, as wn b y t- wo - d c t 1 J1 n e o f F J c. 6, the s,:)rihg plate 66 deforms in the substa-.-a"y icngi-.,Lid-inal direction of the body B. Therefore, an excessive bending force is not CO tcrsion bar 71.

az:)D-lied 'L the In addition, the torsion bar 71 does not prevent the suspension system from moving or bending in the substantially loncitudinal direction of the body E. Thus, the suspension system car, provide an L c rt excellent riding com- ---. 1 When a load i s ar)iDl ied o t'n e wheel W i n the substantialIv lateral direction of the body 3, the suspension arm 50 is pivotably supported to the body B by Since the pivot the two pivot portions 61 and 62. portions 61 and 62 do not elastically deform so much in the --- substantially!a,-era! drecl-ion of the body B, - a load in the substantial!- satisfactory rigidity against v lateral direction oil' the body B can be obtained.

When the wheel W moves in the substantially vertical dirrection of the body, even if the pivot axis P deviates From the center axis T of the torsion bar, there are 9= offset distance 5 and offset angle 5. Thus, as the front end of the suspenslon arm 50 moves in the substantially vertical direction of the body l, the spring plate 66 twists. In other we:ds, the s=ring plate 66 twI.Sts so 1 APO BAD ORIGINAL.0) 19 that the surface thereof inclines. bendinc 'orce is not appl, _Jed to the -inc torc:ue c-E '.he torsion bar 77 -'s '.ransmJt'-er". -c wist th e suspension a.-in 50 throuch the s-pring plate 66.

Therefore, the si-is..Dension system smoothly moves in the -.ially vertical direction of the bod.; B. Since substant the suspension system smoothly moves in the same path, excellent ridinz c oma f' c r t and steer--ng stabilitv i S achieved.

ry To allow the -c.L:s,:)ens-,on system to have sat- -c direezion c t r-igid-i-.y in the s,,1-s-an-.iallv latera he body B and keep satisfactory bending amcunt in the 1 substantially long itud -inal direction c. -he body S,la should be much s ma 11 e r t h an Lb. Because o f the di-f-ference the volumes of the rubber bushings 63 and 64, the f i r s t pivot 61 has a high r -igidi ty in the substartiallLy lateral dirrection of the body B, whereas the second Divot 62 has a low rigidity both in the -iallv loncitudinal direction and the lateral substant direCton of the bodv B. As shown in the figures, when the distance Lc between the line R which c=nects the center of the firSt DiVOt 61 and the center of the ball joint 53 and the.--crce acting point of the torsion bar- 71 is as short as possible, most of the reaction force c-:

the torsion bar 71 is applied to the first pivot port:-on 61. Thus, the rigidity in the substantially lateral the direction of the body B, the bending amount in 1 substantially longi ludinal direction of the body B, a n d the vibration tuninc are nearly unaffected.

The suspension arm 50 is a lower arm which connects the lower end portion c,'-' the knuckle to the body. The upper end portion c-E the knuckle is connected -c the body by for example an i-letter shaped upper arm (not shown).

Between the suspension arm 50 shown in the figure or the upper arm and the bodv, a known shock absorber (nct shown) is disposed. - However, the suspension arm 50 may be used for an upper arm which connects the uppe-r end excessive - 1 I'.

-, 0 L BAD ORIGINAL he suspension arm portion of the knuckle to 'the body. 1 so shown i r, t h e u r e suz)Dcrt-s t n 0- -0-':"-side f- r c p t wheel The wheel can be s,i:)Dcrted by 7:i"cn, t.'ne rear the arm in the sa.-,ne cons t add- k wheels can be also su-3Derte,- by arms ha-s-ca- in the same construct.on.

a r)r-irc-ir)a-', Figs. 8 and 9 show the construction c.

r)or t ion 0 a s u spe n s ii o n s v s t. em, accerd C) a f irst '-;m r modification of --- lir-st e sirtip.Cl-vf t h e = r t - 0:'I S CC) ML c n 'W 1 z r', f 1 I^SL embedi,-,ie.nt are denoted by the same reference n,-,rne-ra"-s. the first I n t embodiment, the other end,Dcrt-Jon 73 c," the torsion bar 71 is fixed to the bod.; =7z -.irough the sleeve 7 5. in the suspension system according to this modif ication, the other end portion 73 of the z:crs:.on 1 Dar 71 is cc.-.-ec-k-ed to a cross member cf- a bodv - by a second sur. Lng plate 67. The spring plates 66 and 67 extend in the - narallel with a center axs T of L torsic)n bar 71. As in the second embodiment, the spring pla-les 66 and 67 it ical have a hich in the substantially vert- r e c t on of t h e body an d a low r c d i n the substantial ly longitudinal d--i rectio'n of the bod.,; B. T n this modification, when a l, oad is applied tc a wheel W in he substantially longitudinal direction c- -he body B or 2, when the wheel W moves in the substantially vertical direction of the body B, a bending force applied to the torsion bar 71 can be -remarkably reduced in comparison with the cons truct- icr of the second embod-Jr-,, e:-.,- because the two spring plates 66 and 67 deform.

Fic. 10 shows the construction c f a suspension system accord-ng to a second modification of the first embodiment. In this suspension system, spring plates and 67 71. A portion iDertion weldinc.

are disposed on both end portions of a torsion first arm portion 51 is branched from a second 52 The fir-st arm portion 51 and the second zed by a means such 52 are integrally construct A ball jont 53 is disposed at a f ront 66 bar arm, arm as end b, BAD ORIGINAL. /y 71 portion of the see,-.j arm r)cr---on 52. At. an end Portion c.',-- the first arm:)crt-on 51, a first 7,-,,j-ot portion 61 J s d II s,.)o s e d. The f irst spring plate 66 -'s connected to the second arm portion 52 bv a pa -- t J1 cu I a rr mea ns such as welding. A line connecting the f irst and second pivot Z r)ortions 61 and 62 extends in a substantially longitudinal direction of the body, the torsion bar 71 extends in parallel with the line, and the s-::)ring plate 66 is arranced In front z:.ne first and second arm Portons 51 and, 52.

shows a suspens-on s-;s,,-em according to a -io,- of -he f 3 rsL embod-iment. In t h -i s third modificat example, a second arm portion 52 extends almost in a substantially lateral d-Lrection of a bod,,; E. A front end is portion of a first arm 51 J s connected to a center :Do of a second arm portion S2 by welding, bolts, or the like. The first arm 51 inclines in the subs--anlt---iall-;; tront direction cIf the body B. A p-vot portion 61 d-sr)osed at a rear end portion of the first arm portion _ISI inclines in the substantially longitudinal direction 0 f the body B. The suspension system moves in the substantially longitudinal direction he body E3 according to the character cf a resilient substance c ot the first pivot portion 61. The first P-'V0t portion 61 is rotatable with an angle substantially in line with t Lhe body; the second piVOt pcrtion 62 is rotatable in the subs tant _Jally longitudinal direction clE the body; the torsion bar 71 extends in the substantially longitudinal direction; and the spring plate 66 is arranged in front of the first and second arm portions 51 and 52.

Next, a second embodiment of the wresent invention will be described. The second embodiment relates to a -CM0b suspension System for an all'L ile, in particular, to a suspension system having a wheel alignment mechanism.

m its shown in Figs. 12A and 12B, a knuckle 80 rc'atably supports a wheel W. A lower end knuckle 80 is connected to a lower arm 82 oortion of the through a ball E3AD ORIGNA1 j1 81. An ur)oe-- 0 _ r. t c o nn e c t e d t c) an u u) e Proximal pcrions mounted on a bodv the body B is turned, connecting the centers 81 and 83 (nameiv, a axis S).

end r)ortion c-' the knuckle 80 js arm 84 throuch a ba'I -jC)1''1- 83.

j L - he arms 82 a-d 8-1 7- a fron=. wheel,;he,- ---the case =2 th wheel W is turned about a line oi the upper and lower ball zurning center axis cra king pIn l h e , e o F e substantial- -eral !a! When the E i s viewed L' rom, the -: t_ r anclemade by tIne center:.--'ale of the w-ee'- Wancvertical plarne V is --e-2erred to as a camber anG"e a.

camber angle a varries according to the inclined angle the king pin axis 5 1 n d-rec't-icn of the bcd-; m. This camber a.lc-le ao-f-:ects the steerina force.

As shown in 12B, when the wheel W is ?:,-owed from a side, the incli-ned ancle of the kinc: pin axis 5 in the substantially longitudinal direction he body js referred to as a caster ancle P. Th i s - caster ancle affects the direction holding force c4' the whee-1 W. The height of the body B is given by the postion in the substantially vertical direction (z direction) of the wheel W to the body B. A-,5't e r the autcmcb-J'-e is assembled, the height of the bod,,v B and the wheel alignment such as camber angle can be adjusted so as to securely provide steering stability,--hereof.

An object of the third embodiment is to provide a susiension system which has both a torsion bar movable in a substantially longitudinal direction of a body and wheel alignment, such as camber angle and caster anc-le, and body height adjust--,"ient mechanism.

Figs. 13 a n d 14 show a cDr..nci-Da-l pc J - n c f a suspension system for an automobile according to a tn-J--d embodiment cf the r)resent invention.

in these ficures, a susDension arm 90 com,.),--;ses a first arm portion (-"rcnt membe.r) 91 and a second arm S oortion (rear memlber) 92. The second arm iD 7 _-on 92 - BAD ORIGINel.

I 3 disposed behind the firs,,- ar,-.i portion 91. A lower end portion of a knuckle (not shewn) which rotatably supports a wheel W is connected to te arm 90 by a ball -joi nJ c c) nn e c n 9 93.

. - su, s p e n s on arm 90 'S referred to as a lo-wer arm or "c)wer!--.k. TI-e susr)ens.or, arm 90 connects the!owe:- end portion cl":: the knuckle with suspens- he body. Thus, the ic,-. arm 90 accords with the lower arm 82 of the si-is-Dens-ici system show,- in Fig.

The E' rst arm Dortion g- and ---r.e second c)crl-icn 92 are znr-2a,-2ed as De cesc---,bed later. T s u s p e m s i --- io arm 90 is a le--',er--s'-a:)ed ar-r. end portcr, c-,= the Ifirst arm pcrtJLon 91 is threaded to a joint holder 94 as W il 1 be described late: Tne j c i nt holder 94 cons t --ucts the fi rst arm port icn 91 The ball 93 mounted on the jeint holder 941.

The first arm portion gI is iDrovided with a first pivot 95 in which a rubber bushing 96 is fitted.

The E-'rst arm portion 91 is supported by the first pivot portion 95. Likewise, the second arm r)ortion 92 is provided with a second pivot portion 97 in which a rubber bushing 98 is fitted. The second arm portion 92 sui:)r)cr--ed 't)v the second civot 97. Thus, t h e first pivot portion 95 and trie second pivot portic.n. 97 -antially ic)ngitud-;.nal are sz)aced apart in a subst direction of the body B. A pivot axial line P which connects the centers of the -':-,',rst pivot portion 95 with portion 97 extends in the subs tant- ally the second pivot long i!l udinal direction of the body B. The volume of the rubber bushing 96 is large., than that of the rubber bushing 98. Thus, when a load is applied to the suspension system, the rubber bushing 98 in the second pivot 97 more elas,-Jcally deforms than the rubber busninc 96 in the first pivot 95 does.

An end portion of a spring plate 101 made oil a lea- spring member is disposed bet-ween the first arm portion 91 and the second arm porticn 92. Thus, the prox-r,-,a ' tion c -,: t h e S p r i nc p-" at e 101 port- is fixed to the L- BAD (DRiG,, 'l ty sul sE)ens i= arm 9 0. The spr-Ing plate 101 extends in the port-inn the z)late ront end pertion c-' a bar :

A r e a -- en c torsion bar.02 is f-xed the body The front end r)o:7tt-,cof the torsion bar connected tc a sleeve 1-03. Pv welldinc the t ' e the spring plate 101, t n -02 is s::)ne- sp) r - n c p 1 a t e 11 0 - -, s f -i x e d 1 - t c body E, the rear end of the bar 102 x e o t h e b c d., t h e sp- nc a t e 101 S xl-S _shown n c,,-sposec: Det-ween the first a--.In pc--t--o7, 91 and the second arm, 92. ln addition, the first arm. portion 91-, r the second armt r)or--.I.c)7. 92, and the s=ing plate 101 are n::ezra- ly cennected wilt 1 n a total of three bolts 11-, 112, and '13.

0 The nolder 94 is connected to the _rst arn, Dcr---on 91 with the be"-,'111 bolts 1,15, 116, and 117.

and three other 17E, and 17C, show a r)rinc_,:)a-, ocrticn a s,,:sr)e,-isor. systern where the s-,s-z)eins-,c- sjslen accordins the t'- -- d embodiment shown i n Figs. 13 t o 16 is prov ded w th a body height adjustment mechanism.

1 113 which connect three belts ill to arm on a second arm portion,92, 10-1 are enlarged. s::)-.i.nG pl, ate and the second arm portion "",ie first ar.m. r=tion 9' 92 are formed by bending a 1 ion s tee! mater ial The interior of- these f 1.rst arm port- 91 and second arm r)crtion 92 are hollow.The first arn, 5911 and the second arm pcrt-JCn 92 have openincs -I according t c these bollts.

Thus, 'these belts can be j5 inserted from 'the cutside into the openings formed on the arni 91 and the second arm portion 92.

- 1 : BAD ORIGINAL JO L---- -;on The bolt 111 passes th-rough the f irst arm pc)i-,., 9-,. Tn addition, the bolt ', ", passes throuch the end portion of the second ar.m portion 1Q2 and a proximaj 101. The bolt 111 extends 'n portion of the sprIng plate - - the substan t loncitudinal direct ion of the body E The bolt 111 and a nut 121 which is thread onto the front end portion Itherrect.' construct a reference thread me,-,,ber.

Ecles for the arm portions 0"l 92 and the spring p",ale 01 through w-cthe belt 7'- _passes accord w" the outer circi-,1TL-I:erence c" the l.' 0 1- - Ihe twc bolts 1112 and 113 are mou-ted on a c cum. e r e n c e G with the san-ie -he bc' 11 The bolts 112 and radius of curvature as t _t 113 are mounted nea.-lv in r)aral-"---" with the bolt 111. ":-rst arm portion 91, the bolts 112 and 111 3, the -- second arm pc--'.-j-c.-i 92, a n dt- e ted.

connect spring plate -101 The bolt 7-7-2 and a nut 122 wnicn is thread onto the z, zont- end therec-F construct a cam thread member. Th e bolt 112 on the nut 122 is tightened by a tool inserted from an opening formed on the second arm portion 11-2. The bclt 112, which is the cani thread member, is -fit to circular holes 131 and 132 w---;.ch accord with the center I t and second arm- 0-1 the bclt I 12 formed or. t'-e f i -S cortions 91 and 92. The bolt 1-12 has a drive cam r)ortion 112a which is eccentric 'from the center thereof. The drive cam portion 112a is engaged with a follower cam portion 133 formed on the spring plate 101. The follower cam iDortion 133 is formed of an oval hole which extends in the radial direction R connecting the center of the bolt 111 and the center of the bolt 112, namely in a direction perpendicular to the circumference G.

- I'h e b o I t 113 The bolt 113 is a reinforcement bolt.

passes through circular holes formed on the first arm portion 91 and the second arm portion 92. In addition, as shown in the figure, the bolt 113 passes through an oval hole 134 which extends i - the direction of the circumference G of the sprinq clate 101. Thus, while the 13AD ORiGhVAL)) i L_ 6 nuts 121, 122, and 123 which are 'thread onto the three bolts 111, 112, and 113 are be-,:-,g loosened, wle- the nut 112 as the cam thread member is r c t a t e d, a -D r c x i ma 1 portic.n of tIhe spring plate 1C1 connected to tne torsion -call., de.":c)--.-ns about the bc-i ill. Thu S ' a S bar 102 vert- sh -- w n i n F i c. 16 e sp r i n 9 p11 a 1. e 10 11 v e r t i c a 11 v r c t a t e s :cre, f -- r an an gli -- he about the bol t 1 _Phere f p r ox imal r)c r t i on c --- t h e sr)r i nc r) 1 a t e 101 vertically defforms about- the hall b al. 1 ', c 'I r. t 93 v e r t_ i -- a - v de,:0r"rks Therefore, the he-g'-z of the body is automobile has bee- assembled, when s performed,.he of the bod.; - ng ' c. 1 t e7, - he bolt 112 and 4 i C) 1 1 -Z b C,- adjusted. After an the wheel alignment can be adjust-ed. EY c)mr)leed. The t i S c- - be used f c) r t h. e thread member, the ad - us t m e n bcit '13 MaV reinfc.-cement b C 1 t a. nd t n e resoectively.

- cs. 18,:'., ' 83-, and 18C show a pr incipal por tion of a susiDension system having a w-eel caster angle is adjust.-iient. mec.nanis-m. A bclt!I! and a nut 121 whicn thread thereto construct a c am t, hr e a d t member which tightens a first arm pcrtticn 91, a second arm portion 92, and a spring plate 101. The bCDL ill has a crive cam port-,on l',lla which is eccentric to the center thereof. The second arm pcrtior. 92 has two fc1lower cam portions ',35 which are encaged with the drive cam pcrtion!!!a. Lhe fcllower cam portions 135 are opposed in a substantially lateral direction of a body. Two bolts 112 and 113, which are disposed in parallel with the cam 30 thread member 111, and nuts 122 and 123 which are thread 'thereto construct a 1.4ghtening thread member. The bolts 112 and 113 pass through oval holes 132 and 132a formed on the second arm portion 92. The oval holes 132 and 132a extend in the substantially lateral direction of the body. The bolts 112 and 113 are fit to circular holes.c.rmed on the first arm portion 91 and the spring plate 101, resoectivel", Thus, while the three bolts!!Ito nu t s, -e BAD ORIGINAL L, - jr.

27 113 are being thread T.e,-,iber porticr,. 92 to the first d-.-ec"t.ic-n of 1..t-ie body varies as shown by arrow Y 15. in the ficure, the iDesitior.s of the center 01 first Divot porticn 95 and the center 0 the 2 pivot r)crtion 97 acainst tL--- body do not. chance.

the end of the fIrst arm 7)ortJcn 91, or. 0 t h e n 93, mc,,;es the r)CS t;,a", s u b s 'I an t -i a 1 -1; L c) r, 9 1 --.j d -, n a _I d i -- e c t i c), X c) _ th e b c d -1.. A S a I " "' Js adjusted. A - - - the caste: ancle c-- the whee resul this adustment is completed, -the nuts are tightened. J Figs. l 9A and 1, 93 shc-;,; a pr incipal portion locsened, whe- the bolt. ill as the cam a rm. -j c r 't i c n 9 1 In the the second lateral, Z 7. cl. IC.

c f t h e s e c c,-. d h, u S ' n a:7 e y s.,is::)ers-on system havinc a w'---el camber angle adjustme-t. 15 mechanism.

The figures shcw a portion where a joint holder 94, first and second arm portions 91 and 92, spring plate 101 are connected to each other. These portions are connected by a cam thread member which is c.

constructed of a bolt 111 and a nut 121 thread there, The beit 111 has a drive cam portion illb which -S eccentric to the center thereof. The drive cam portlen 111b is formed on a joint holder 94. T-he: drive cam portion llib passes through a follower cam portion 136 which is an oval hole extending in the substantially vertical direction of the body.

On the other hand, bolts 115 to 117 extend in a direction nearly perpendicular.c the belt 111, namely in the substantially vertical direction of the body. Th., e bolts 115 and 117 and nuts 125 to 127 which are thread thereto constitute a tightening thread member. The bolts 115 to 117 pass through oval holes 137 to 139 formed c.-1 the join,. holder 94. The oval holes 137 to 139 extend:_n the lateral direction of the body. Thus, while the nuts 121 and 125 to 127 are being loosened, when the bolt 111 as the cam thread member 15 rotated, the drive can, portion 1111 b and the follower cam iDortion 136 are engaged with each other. Thus, the join'. holder 94 deforms in BAD OHIGJJ"AL L- &A 22 ec t the substantially lateral di-- o r, c r e s u 1 t, the camber angle c:

Th e r e a ff t e by ch t -- ni n 9 a 1 c ow 1 e t ed men'. sInow- embodi -- e body. As a be adJusted.

is and 19E, th e follower cam portion, 136 is -cc--,med on jointholder owe- cam. z)ortt'c)n -- the folL '76 rnay be formed t seccnd arm 92, --wer 94. Eowever or. the first- arm portion 9-1 and the s-rJr-,c: p- ate 0" cam 66 is e.c:acer- the ------ve ca:-,.pc:-ti 07.

-S case, the 11 -1 b. t 1-1 - portion which is not eccentric tc -S th e b c 7-C a As the bolt ill is rotated, the ic),n-- holder 94 deforms in the a lateral direction c f the bcd-,; acainst t In e first po i c n 9 1 Thus, t..'-le carnbe r anc 1 e of zi- e whee 1, can be --ed.

a c ju s 1.

2 0 -, 202, 20C, and 20D s h o w a p r i r. c i p a 1 portion of a susmension system 1-aving a mechan-sm which can ad-Just the overall body height, caster angle and 20 camber angle of a wheel.

A first arm r)cr-ion 91, a second arm portion 92, a spring plate 101, and a j o i n t ted to each other by a first cam holder 94 are connect thread member. The first cam thread member is zed of a boil- ill and a nut 121 s threaded 1-ruc.

cons thereto. The bolt ill extends in a substantially longitudinal direction of a body. on a circumference G with the same radius of curvature from the center of 'the bolt Ill, two bolts 112 and 113 are mounted nearly in Parallel with the bolt 111. Ey these bolts 112 and 113, the first arm portion 91, the second arm portion 92, and tened to each other.

the spring plate 101 are tight A bolt 112 and a nut 122 which is threaded onto the front. end thereof construct a second cam thread memberThe bolt 112 is fit to a c:.rcular hole 131, formed on the first ^S t arm portion 91. in the embodiment shown in Figs. 17A, 11.73, and 17C, the bolt 112 has a drivecam perticn 112a. The drive cam portion 112 is engaged with BAD ORIGINAL 1 1 1 a follower cam i01 A s.1 n t h e b od e n 7C, a reinf orceme-t bolt on the f - rst- 1 A 0 on the Sp.- nc:-, a -- e rouc:- an ova-, hc:-- f ormed on the s-,:)r inc, 7)1a te " C", -- 7, th e m e c h an - s -,-,i s'. c w 7, lhe same as has'-own in F c. " 7. u S ' L. - 1. - - - ne-c:ni ca-. be -'n e -- boil- l_ 1 the firs' "!a which is eccentric.c nei--.,be-- has a dr -ve cam, Dor t ion tne center axis --1-ereol' as i. ihe embod-ment shown in 8 On the second arm 92, two follower c:a-,, portions 135 w.-1- are engaced -w- tne drive cam are opposed. in subs zantially lateral dJ reci-Jon, the s,,zcc)nd ar.m. -jortion 92, as shown in cf the bodv. Or, c. 201, oval holes 132 and 132a which extend in th-2 subs tant ally lateral directior, of' the bodv are formed.

The bc-.--s 112 and 1113 pass t.heoval holes J32 a, nd 132a, respectively. Thus, while tne three belts 11 -7 to E St 113 are be---,ic loosened, when the bell- -111 as the 1 ' e cam thread member is rotated, a ront end -jcrl-icn c second a rm p or t - i on 92 defor.ns lateral direction of 'the bocv against the first. arm portion 91 as in tne embodiment shown in Fig. -,8. Inus the caste.- angle of the wheel can be adjusted.

J n the subs t A bol' 115 is one of three bolts which connect '.-,e 7cint holder 94 to t.he firs-- arm)orl-ion 91. The bolt- 115 and a nut 125 which is threaded thereto constitute a 4- l; cam thread member. The 115 has a drive C:a-,-l r)o.-tion 115a. The drive ca.-,, portion 115a is fit Z:0 an oval hole 137a formed on -the joInt holder 94. T.he oval tends n the su--stantially longitudinal hole 137a ext direction oil: the bed,;. The two belts 116 and 1-7 are tightening bolts. The bolts 116 and 117 pass throug. n c-val, holes 138 an 1399- which e.,::e-.d in the subs tant ially BAD ORIGINAL 7M f t 1 direction cl he body and are formed on the -jcnt cl 4 7 llu s e t h et'- r e e be -ipc loosened, w-e-. 1--)e b31t -1 5 as member _; s r s t a te d, t-e nolder subs tantial ly!a-.era-, di-rection of the b,d-v ball jointE 93 disposed a. a joint holder a, - deorms n d i r e c t - c,-, c, _ th e b c) d v. -L S wheel can be adjusted.

= - ' - - 'n m _--- t_ body height, b c) 1 t s 115 to 117 a -- e tl-e - rd cam thread 94 deforms in the Thus a front end r)o--tton of z_ h e -ne an 'ally aterai, subst t - - the ancLe of t c amb e r t n e - a-g-e, a n - -r, e camber angle have been a6juste6, b " a y _,hzen_,nc the bolts and nuts, the ad-,ustment is completed.

zFigs. 21A, 21S, and 21C sniow a pr f incipal portion off a suspension system having a mechanism wnich can adjus-, bpth body height and camber angle cf a wheel. A bolt 41 extends _4 n a substantially longitudinal direction of a body and connects a first arm I)Or-LiCn 91, a second arm IDOrLiC_11 92, and a spring plate 101. The bolt ill and a nut 51 wt;ich is -threaded thereto constitute a first cam thread member. As in the embodiment shown, in Fig. 17, the first arm portion 91, the second arm 92, and -ed by a bc't 112 and a Jng plate 101 are connect the spr t i g ',t 1-13.

.,_ena.ng bolt.1. The bolt 112 constitute a second cam thread member. As in the embodiment shown in Fig.

-he bo!- 112 has a drive cam portion 112a. The 17, t spring plate 101 has an oval hole 63 as a follower cam portion. Thus, while the three bolts 111 to 113 are -he bolt 112 as the second cam being loosened, when thread member - is rotated the body height can be adjusted.

As in the embodiment shown in Fig. 19, the bolt Ill as 'the first cam thread member has a drive cam portion lilb which is eccentric to the center thereof. The drive -ion llia is f it to an oval hole 136 formed on a cam port joint holder- 94. The cva-l hole 136 extends in a subs tan'. a!!,,; vertical direction of the body. The oval hole 136 Is a follower camportion. As in the embodiment- I BAD Oti1GINAL.4 L_ 31 shown in Fig. 19, three bolts 115 to 117 which connect the first arm pc--t-Jcn 91 and the -o-,nt ',older 94 pass through c-,,7a! holes 137 to 139 formec- on tne '-cder 7 C 94 Th e o v a 1 'M 0"I S 137 z 0 39 e x t e n d subs tantially 1-1 atteral direc t-, --- cf t--- bcdy. Th U s, w h 1 e the bolts 111 and 1: 15 to 117 are beinq loosened, when the -he joint ncider bolt 111 is rota--ed, t 9 4 d e -f- c -- m s -, n t h e lateral direction of the bodwT h e r e f o -- e embodiment srown in Fig. - 91, camber wheel can be ad-usted.

A -ter the body height and: --ne ca.mber wheel have beer. adjusted, a 11 the bol ts are t ig'nte-ned with the nuts. Thus, the adjustment is completed. i n the embodiments shown in Fics. 20 and 21, as in the embodiment shown in Fig. 17, tne funczions of the bclts 112 and 113 may be reversely desgnated. In other words, the bolt 112 and the bolt 113 may be used for a reinforcement bolit and a cam thread member, respect-ivelv.

Figs. 22A, 22B, and 22C show the construction of a modification cf: the suspension system having the body height adjustment mechanism shown in Fig. 17. In this modification, two follower cam nortions 133a and 133a are opposed on a circumference G. T n e- two -'!J- cwer can, portions 133a and 133a are cisposea on a first a r m portion 91 through a bolt 112.' The bolt 1112 constructs -hread member. A drive cam portion 112a which is cam 1.

engaged with the follower cam portions 133a and 133a is -he cent disnosed eccentrically from 1. er of the bolt 112.

As shown in Fic. 22C, a spring plate 101 has oval holes 134 and 134a on the circumference C. The bolts 112 an6 -he oval holes 134 and 134a. Thus, when 113 pass through 1. the bolt 112 is rotated, the spring plate 101 is rotated about the bolt 111 against the first arm Dcrt-on 91 and the second arm portion 92. in the suspersion system olthis type, as in the embodiment shown in Fig. 17, the body height can be adjusted.

BAD ORIGINAL L a -GS. 23A, 2':, " o c,,, r, -) - n c 1 c) n 5 -; 5 -- 7 fellower carn e,-gac:e,- the a bo-,-- -,11. -- h e a - d 3 Cs'. i) -;.; a - c) t_ 1-, --:- m c d i ff -, c a tt i c, -k z: G - ri v e c: am z,: c Win i c:'- -E is -35a - cllowe:- cam c,va n e a E s - h e.

0 J_ s 1. a r m p o r 't i c r. 99 an d --.-i e s p r --' 7 z:p a te MOV e S c P. z a :rcn'. end arm 91 r e su a f --.1 m c v e s _; - a s u b- s t _; n -- i a i i v 1 c r. c -' c- n, a - d - r e c t on 'i' c:

b--dy. Therefore, in each mod---catt-on c,' -the --'--rd errbed-;-,-,nenz:, or-ent-attions off all, -the beits and nuts are threaded theret.c can be reverselly desJc-ialted wth respect. '-c each - t in cons-deration c--- k-.-le, Iv of 1-ocis fo-r P, e'erenueis di -eited. to c o-peidiiiq ApD I i cat ion \u 93168'3. 2

Claims (5)

WhICh ClaiMS Md'Ltef des:p-ibed Iri this applicdt ion. 1 BAD OR)GINAL J2 L PO 33 CLAIMS:
1. A suspension system for automobile, having first and secona; pivot portions on a body for supporting said suspension system comprising:- a suspension arm for supporting a wheel and having first and second arm portions rotatably mounted on the f irst and second pivot portions rotatably mounted on the first and second pivot portions which are shifted with each other in a substantially front to rear direction; torsion bar having one end connected to said body; spring plate having a proximal portion mounted on said suspension arm, and a portion connected with the other end of said torsion bar; a joint holder interposed between said suspension arm and said wheel; a cam thread member connecting said suspension arm to said joint holder and having a drive cam portion being eccentric to a center of said cam thread member; and one of said joint holder and said suspension arm having an oval hole as a follower cam portion to be engaged with said drive cam portion to cause said joint holder to displace in a lateraL direction of the body by rotating said cam thread member, so as to adjust a camber angle of the wheel.
2. A suspension system according to claim 1, further comprising:- at least one tightening thread member connecting said join-holder to said suspension arm; and said joint holder having an oval hole extending in a lateral direction of the body through which said tightening thread member passes.
3. A suspension system according to comprising:- a joint holder interposed between said suspension and said wheel and having a connecting point of said suspension arm; and SAL) OR1U,J, VA- claim 1 or 2, further 34 first cam means for rotating said suspension arm in a vertical direction with respect to said connecting point to adjust a height of said body.
4. A suspension system according to claim 3, further comprising:second cam means for changing a relative position between said first arm portion and said second arm portion of said suspension arm in a lateral direction to adjust a center angle of the wheel.
5. A suspension system according to claim 4, comprising: a joint holder interposed between said suspension arm and said wheel; and third cam means for changing a relative position of said joint holder in a lateral direction with respect to said suspension arm to adjust a camber angle of the wheel.
further BAD ORIGINAL
GB9617233A 1992-08-19 1993-08-13 Suspension system for automobile Expired - Fee Related GB2301322B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP22003192A JP3202070B2 (en) 1992-08-19 1992-08-19 Automobile suspension systems
JP22003092A JPH0664424A (en) 1992-08-19 1992-08-19 Suspension device for automobile
JP22003292A JPH0664425A (en) 1992-08-19 1992-08-19 Suspension device for automobile
GB9316853A GB2274816B (en) 1992-08-19 1993-08-13 Suspension system for automobile

Publications (3)

Publication Number Publication Date
GB9617233D0 GB9617233D0 (en) 1996-09-25
GB2301322A true true GB2301322A (en) 1996-12-04
GB2301322B GB2301322B (en) 1997-02-05

Family

ID=27451055

Family Applications (4)

Application Number Title Priority Date Filing Date
GB9617234A Expired - Fee Related GB2301323B (en) 1992-08-19 1993-08-13 Suspension system for automobile
GB9600353A Expired - Fee Related GB2294668B (en) 1992-08-19 1993-08-13 Suspension system for automobile
GB9617294A Expired - Fee Related GB2301324B (en) 1992-08-19 1993-08-13 Suspension system for automobile
GB9617233A Expired - Fee Related GB2301322B (en) 1992-08-19 1993-08-13 Suspension system for automobile

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB9617234A Expired - Fee Related GB2301323B (en) 1992-08-19 1993-08-13 Suspension system for automobile
GB9600353A Expired - Fee Related GB2294668B (en) 1992-08-19 1993-08-13 Suspension system for automobile
GB9617294A Expired - Fee Related GB2301324B (en) 1992-08-19 1993-08-13 Suspension system for automobile

Country Status (1)

Country Link
GB (4) GB2301323B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415178A (en) * 1980-12-26 1983-11-15 Honda Giken Kogyo Kabushiki Kaisha Suspension for motor vehicles
GB2144685A (en) * 1983-08-11 1985-03-13 Avtomobilny Z Im Leninskogo Ko Suspension of a motor vehicle
EP0255921A2 (en) * 1986-08-04 1988-02-17 Specialty Products Inc. Camber adjustment
US4753454A (en) * 1986-08-29 1988-06-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Device for vehicle wheel camber adjustment
US5382043A (en) * 1988-08-01 1995-01-17 Jordan; Mark P. Suspension alignment device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415178A (en) * 1980-12-26 1983-11-15 Honda Giken Kogyo Kabushiki Kaisha Suspension for motor vehicles
GB2144685A (en) * 1983-08-11 1985-03-13 Avtomobilny Z Im Leninskogo Ko Suspension of a motor vehicle
EP0255921A2 (en) * 1986-08-04 1988-02-17 Specialty Products Inc. Camber adjustment
US4753454A (en) * 1986-08-29 1988-06-28 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Device for vehicle wheel camber adjustment
US5382043A (en) * 1988-08-01 1995-01-17 Jordan; Mark P. Suspension alignment device

Also Published As

Publication number Publication date Type
GB2294668B (en) 1997-02-05 grant
GB2294668A (en) 1996-05-08 application
GB9617294D0 (en) 1996-09-25 grant
GB9617233D0 (en) 1996-09-25 grant
GB2301323A (en) 1996-12-04 application
GB2301324B (en) 1997-02-05 grant
GB2301323B (en) 1997-02-05 grant
GB9600353D0 (en) 1996-03-13 grant
GB2301324A (en) 1996-12-04 application
GB2294668A8 (en) 1996-06-10 application
GB9617234D0 (en) 1996-09-25 grant
GB2301322B (en) 1997-02-05 grant

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Effective date: 20050813