WO1993012362A1 - Shock absorber, and head assembly therefor - Google Patents

Shock absorber, and head assembly therefor Download PDF

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Publication number
WO1993012362A1
WO1993012362A1 PCT/GB1992/002311 GB9202311W WO9312362A1 WO 1993012362 A1 WO1993012362 A1 WO 1993012362A1 GB 9202311 W GB9202311 W GB 9202311W WO 9312362 A1 WO9312362 A1 WO 9312362A1
Authority
WO
WIPO (PCT)
Prior art keywords
head assembly
location
shock absorber
assembly according
tubular member
Prior art date
Application number
PCT/GB1992/002311
Other languages
French (fr)
Inventor
Michael John Andrews
David Carrington Yates
Original Assignee
Hampton Industries Limited
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
Application filed by Hampton Industries Limited filed Critical Hampton Industries Limited
Publication of WO1993012362A1 publication Critical patent/WO1993012362A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/362—Combination of sealing and guide arrangements for piston rods
    • F16F9/364—Combination of sealing and guide arrangements for piston rods of multi-tube dampers

Definitions

  • This invention is concerned with shock absorbers, particularly shock absorbers for motor vehicles.
  • a conventional shock absorber for a motor vehicle hereinafter referred to as being of the kind specified, comprises a piston slidable mounted in an inner tubular member, said inner tubular member being located within, generally coaxially of, an outer tubular member. At one end a head assembly is provided, said head assembly providing:
  • the location means is afforded by a housing, for example of sintered metal, with which the ends of the tubular members are engaged and held in desired relative positions, the inner tubular member conventionally being located within a rebated inner diameter as a press fit, and the outer tubular member being rolled over an outer edge portion of the housing.
  • the housing carries a bearing member of low friction material affording said bearing means, and a support member, conventionally in the form of a metal washer, upon which a sealing gasket is supported.
  • Such an assembly is expensive to manufacture and complicated in its assembly, and it is one of the various objects of this invention to provide a head assembly for a shock absorber of the kind specified which is less expensive in its construction, and/or less complicated in its assembly.
  • a head assembly in which the location means comprises an annular location member, an outer edge portion of which in use is trapped between the inner and outer tubular members.
  • the annular member comprises an axial skirt at a radially outer portion, which in use is trapped between the side walls of the tubular members.
  • the annular member comprises a central circular portion, and thus may be afforded by a metal washer having a central circular portion and a circumferential skirt at the radially outer portion.
  • the location member is provided with channel means to permit the flow of hydraulic fluid from an inner portion in communication with the interior of the inner tubular member to an outer portion in communication with the space between the inner and outer tubular members.
  • the sealing means of the head assembly comprises a sealing member which is supported directly by said location member.
  • the sealing member By supporting the sealing member directly from the location member, the requirement for an additional support means is removed, and additionally, more reliable support, and hence more reliable sealing, is obtained.
  • the bearing means of the head assembly is adapted to be supported by the inner tubular member.
  • the housing By supporting the bearing means on the inner tubular member, as distinct from the housing, the bearing means preferably being engaged directly between the inner and outer tubular members, the housing may be a simplified construction, and the bearing means may be constructed so as to perform more effectively.
  • the bearing member is adapted to be supported in a radial direction between the piston rod and the inner tubular member, and is preferably supported against movement in a first axial direction by location within an outwardly-swaged margin of the inner tubular member, and in a second radial direction preferably by the location member, either directly, or indirectly through the sealing means.
  • the bearing means may comprise a body moulded from plastics material (such as nylon) and a bearing element of low friction material such as PTFE or graphite carried by the moulded body.
  • the bearing means is afforded by a first bearing member supported by the inner tubular member which provides the requisite strength for the bearing assembly, and a second bearing member located radially inwardly of the first bearing member which is close to the piston rod and which is of low friction material, said second bearing member deriving support from the first bearing member.
  • the head assembly comprises a rebound stop, conveniently being snap-fitted to the bearing means of the head assembly, with a load spreading member advantageously located therebetween.
  • a head assembly for a shock absorber of the kind specified in which the bearing means is supported by the inner tubular member.
  • the sealing means comprises a sealing member mounted on a support means engaged directly between the inner and outer tubular members.
  • a head assembly for a shock absorber of the kind specified comprising a rebound stop, carried by the head assembly, preferably by the bearing means thereof.
  • a head assembly of the kind specified, wherein an oil flow path is provided between the bearing means and the piston rod, said oil flow path extending to channels or grooves provided in the underside of the location means to enable oil to flow into the space between the inner and outer tubular members.
  • FIGURE 1 is a schematic sectional view of a conventional shock absorber
  • FIGURE 2 is an enlarged view showing a head assembly of the shock absorber shown in Figure 1;
  • FIGURE 3 is a schematic view showing the head assembly which is the first embodiment of this invention.
  • FIGURE 4 is a schematic view showing the head assembly which is the second embodiment.
  • the shock absorber shown in Figure 1 is a conventional shock absorber, being of the kind specified, comprising a piston rod 6 carrying a piston 8 slidably mounted in an inner tubular member 10, the piston rod 6 extending through a head assembly 12 which provides supportive location between the inner tubular member 10 and an outer tubular member 14, generally coaxial with the inner member 10, at their upper ends, in addition to providing bearing and sealing ' means for the piston rod 6.
  • the conventional head assembly 12 comprises a housing 16 pressed from sintered metal having a circumferentially outer surface 17 onto which the inner tubular member 10 is press-fitted, and a circumferentially outer surface 19 on which the outer tubular member 14 is press- fitted, the upper end 15 of the outer tubular member 14 being rolled around a top edge of the housing 16, said housing 16 affording the location means of the head assembly.
  • a support member 20 Carried by the housing 16 is a support member 20, in the form of a metal washer, which carries a sealing gasket 22, engageable with the piston rod 6, said gasket affording the sealing means of the head assembly, whilst located in a counterbore 24 of the housing 16 is a bearing bush 26 of PTFE, affording the bearing means of the head assembly.
  • piston rod 6 carries a rebound stop 30 mounted on its length between the head assembly 12 and the piston 8.
  • the head assembly 40 which is the first embodiment of the invention comprises a location means afforded by an annular metal location member 42, advantageously being in the form of a metal washer having a short axial skirt 43 at a radially outer portion, the washer being trapped between an upper end face of the inner tubular member 10b. and a rolled margin 15b of the outer member 14b, the skirt 43 being trapped between inner and outer faces of the two tubular members.
  • an annular metal location member 42 advantageously being in the form of a metal washer having a short axial skirt 43 at a radially outer portion, the washer being trapped between an upper end face of the inner tubular member 10b. and a rolled margin 15b of the outer member 14b, the skirt 43 being trapped between inner and outer faces of the two tubular members.
  • channel means afforded by a radial depression 44, allowing oil to drain into the space between the inner and outer tubes.
  • tubular members are held together at their upper ends relatively simply, the member 42 carrying an oil seal 22b, whilst a bearing assembly 26b. is supported by the inner face of the inner tubular member 10b, said bearing member 26b_ conveniently being moulded from low friction plastics material such as nylon, being retained in position against downward movement by a swaged region of the inner tubular member 10b. at its upper end portion, and against upward movement by engagement with the sealing gasket.
  • bearing assembly 26b derives its radial support from the inner tubular member 10b, as distinct from the embodiment shown in Figure 2, in which the bearing member 26 derives its radial support from the housing 16.
  • the bearing member 26b_ carries a load spreading member in the form of a metal washer 46, around which is located a plastics moulding 48 affording a rebound stop for the piston of the shock absorber. Additionally, the plastics moulding, being clipped onto the bearing member 26b_ as shown, also serves to retain a piston ring 49 on the piston rod 6b, the piston road being located between an inner annulus of the metal washer 46, and a tapered circumferential face of the bearing member 26b_.
  • the head assembly 40c which is the second embodiment of the invention is shown in Figure 4, in which similar numerals with the suffix c . have been used, and comprises a location means afforded by an annular metal washer 42c. having a short axial skirt 43c. at a radially outer portion, the washer being trapped between an upper end face of the inner tubular member 10c . and a rolled margin 15c. of the outer member 14c, the skirt 43c. being trapped between the inner and outer faces of the two tubular members. In this manner the tubular members are held together at their upper ends relatively simply, the member 42c . carrying an oil seal 22c. which is trapped at a radially outer flange 60 between the washer 42c. and the roller margin 15c.
  • the oil seal 22c. is provided on an axially outer part thereof with a radial dirt lip 62, and carries, at an axially inner part, a low friction plastic ring 64 which is held in engagement with the piston rod 6c.
  • the oil seal 22c. is moulded around the metal washer 42c. to prevent egress of oil therebetween, the compression of the upper portion of the oil seal against the washer 42c. by the rolled margin 15c . completing the seal.
  • a bearing assembly 26£ comprises a first bearing member 66 in the form of a moulded body of a material which is relatively strong, and provides the requisite strength to the bearing assembly, such as glass-filled nylon and which derives its radial support from its inner tubular member 10c.
  • the bearing assembly also comprises a second bearing member 76, of a low friction material such as PTFE or graphite, which derives its radial support from the first bearing member 66, the second bearing member 76 being located within a circumferential recess 68 on the inner face of the first bearing member 66, a lip 78 of the second bearing member extending into a circumferential channel 70 of the first bearing member.
  • a piston ring 86 Located between an upper edge of the second bearing member 76 and a radial flange 72 of the first bearing member (said radial flange 72 defining the upper margins of the recess 68) there is provided a piston ring 86, said piston ring being of low friction material such as PTFE, and being capable of longitudinal (floating) movement in close confinement with the outer surface of the piston rod 6c.
  • a plastics moulding 48c which affords a rebound stop for the piston of the shock absorber, said rebound stop comprising a radial lip 49 which is snap-fitted into a radial channel 74 of the first bearing member 66.
  • the moulded body 66 may be constituted by more than one component if desired, and that a load spreading member, similar to the member 66, may be interposed between the body 66 and the rebound stop 66.
  • an oil flow channel is provided between the piston 6c. and the inner tubular member 10c . to the space between the inner tubular member and the outer tubular member 14c, said oil flow channel comprising a section A extending between the piston rod 6£ and the inner circumferential surface of the second bearing member 76, a second section B extending between the outer surfaces of the piston ring 86 and the bearing assembly, a third section C extending between the bearing assembly and the oil seal 22c, and a fourth section D afforded by radial depressions 44c in the underside of the metal washer 42c.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A shock absorber, typically for a motor vehicle, comprises a piston rod (6) carrying a piston (8) slidably mounted in an inner tubular member (10), the piston rod (6) extending through a head assembly (12) which provides supportive location between the inner tubular member (10) and the outer tubular member (14). The head assembly comprises a location member (42), by which the inner and outer tubular members (10, 14) are securely located together, and bearing means (26) engage directly between the inner tubular member and the piston rod (6). A sealing means of the head assembly is afforded by a sealing member (22) which is supported directly by the location member. The location member is afforded by an annular metal washer comprising an axial skirt (43), said axial skirt (43) being trapped between the sidewalls of the tubular members, channel means (44) being provided in the underside of the location member to afford an oil flow path.

Description

Title: "Shock absorber, and head assembly therefore"
Description of Invention
This invention is concerned with shock absorbers, particularly shock absorbers for motor vehicles.
A conventional shock absorber for a motor vehicle, hereinafter referred to as being of the kind specified, comprises a piston slidable mounted in an inner tubular member, said inner tubular member being located within, generally coaxially of, an outer tubular member. At one end a head assembly is provided, said head assembly providing:
(a) location means by which the inner and outer tubular members are securely located together;
(b) bearing means for a piston rod of said piston;
(c) sealing means for said piston rod.
Conventionally the location means is afforded by a housing, for example of sintered metal, with which the ends of the tubular members are engaged and held in desired relative positions, the inner tubular member conventionally being located within a rebated inner diameter as a press fit, and the outer tubular member being rolled over an outer edge portion of the housing. Conventionally the housing carries a bearing member of low friction material affording said bearing means, and a support member, conventionally in the form of a metal washer, upon which a sealing gasket is supported.
Such an assembly is expensive to manufacture and complicated in its assembly, and it is one of the various objects of this invention to provide a head assembly for a shock absorber of the kind specified which is less expensive in its construction, and/or less complicated in its assembly.
According to this invention there is provided, in or for a shock absorber of the kind specified, a head assembly in which the location means comprises an annular location member, an outer edge portion of which in use is trapped between the inner and outer tubular members. Preferably the annular member comprises an axial skirt at a radially outer portion, which in use is trapped between the side walls of the tubular members.
Preferably the annular member comprises a central circular portion, and thus may be afforded by a metal washer having a central circular portion and a circumferential skirt at the radially outer portion.
Desirably the location member is provided with channel means to permit the flow of hydraulic fluid from an inner portion in communication with the interior of the inner tubular member to an outer portion in communication with the space between the inner and outer tubular members.
Preferably the sealing means of the head assembly comprises a sealing member which is supported directly by said location member. By supporting the sealing member directly from the location member, the requirement for an additional support means is removed, and additionally, more reliable support, and hence more reliable sealing, is obtained.
Preferably the bearing means of the head assembly is adapted to be supported by the inner tubular member.
By supporting the bearing means on the inner tubular member, as distinct from the housing, the bearing means preferably being engaged directly between the inner and outer tubular members, the housing may be a simplified construction, and the bearing means may be constructed so as to perform more effectively.
Preferably the bearing member is adapted to be supported in a radial direction between the piston rod and the inner tubular member, and is preferably supported against movement in a first axial direction by location within an outwardly-swaged margin of the inner tubular member, and in a second radial direction preferably by the location member, either directly, or indirectly through the sealing means. The bearing means may comprise a body moulded from plastics material (such as nylon) and a bearing element of low friction material such as PTFE or graphite carried by the moulded body.
Thus preferably the bearing means is afforded by a first bearing member supported by the inner tubular member which provides the requisite strength for the bearing assembly, and a second bearing member located radially inwardly of the first bearing member which is close to the piston rod and which is of low friction material, said second bearing member deriving support from the first bearing member.
Preferably the head assembly comprises a rebound stop, conveniently being snap-fitted to the bearing means of the head assembly, with a load spreading member advantageously located therebetween.
According to this invention there is also provided a head assembly for a shock absorber of the kind specified, in which the bearing means is supported by the inner tubular member.
According to this invention there is also provided a head assembly for a shock absorber of the kind specified, in which the sealing means comprises a sealing member mounted on a support means engaged directly between the inner and outer tubular members.
According to this invention there is also provided a head assembly for a shock absorber of the kind specified, comprising a rebound stop, carried by the head assembly, preferably by the bearing means thereof.
According to this invention there is also provided a head assembly of the kind specified, wherein an oil flow path is provided between the bearing means and the piston rod, said oil flow path extending to channels or grooves provided in the underside of the location means to enable oil to flow into the space between the inner and outer tubular members.
According to this invention there is also provided a shock absorber of the kind specified, wherein the head assembly is constructed as set out in the last preceding fifteen paragraphs. The above and other of the various objects and several features of this invention will become more clear from the following description, to be read with reference to the accompanying drawings, of two head assemblies for a shock absorber, which are preferred embodiments of this invention, having been selected for the purposes of illustrating the invention by way of example. In the accompanying drawings:
FIGURE 1 is a schematic sectional view of a conventional shock absorber;
FIGURE 2 is an enlarged view showing a head assembly of the shock absorber shown in Figure 1;
FIGURE 3 is a schematic view showing the head assembly which is the first embodiment of this invention; and
FIGURE 4 is a schematic view showing the head assembly which is the second embodiment.
The shock absorber shown in Figure 1 is a conventional shock absorber, being of the kind specified, comprising a piston rod 6 carrying a piston 8 slidably mounted in an inner tubular member 10, the piston rod 6 extending through a head assembly 12 which provides supportive location between the inner tubular member 10 and an outer tubular member 14, generally coaxial with the inner member 10, at their upper ends, in addition to providing bearing and sealing ' means for the piston rod 6.
As will be seen from Figure 2, the conventional head assembly 12 comprises a housing 16 pressed from sintered metal having a circumferentially outer surface 17 onto which the inner tubular member 10 is press-fitted, and a circumferentially outer surface 19 on which the outer tubular member 14 is press- fitted, the upper end 15 of the outer tubular member 14 being rolled around a top edge of the housing 16, said housing 16 affording the location means of the head assembly.
Carried by the housing 16 is a support member 20, in the form of a metal washer, which carries a sealing gasket 22, engageable with the piston rod 6, said gasket affording the sealing means of the head assembly, whilst located in a counterbore 24 of the housing 16 is a bearing bush 26 of PTFE, affording the bearing means of the head assembly.
In conventional manner the piston rod 6 carries a rebound stop 30 mounted on its length between the head assembly 12 and the piston 8.
The head assembly 40 which is the first embodiment of the invention comprises a location means afforded by an annular metal location member 42, advantageously being in the form of a metal washer having a short axial skirt 43 at a radially outer portion, the washer being trapped between an upper end face of the inner tubular member 10b. and a rolled margin 15b of the outer member 14b, the skirt 43 being trapped between inner and outer faces of the two tubular members. Provided on the inside of the metal component 42 is channel means afforded by a radial depression 44, allowing oil to drain into the space between the inner and outer tubes.
In this manner the tubular members are held together at their upper ends relatively simply, the member 42 carrying an oil seal 22b, whilst a bearing assembly 26b. is supported by the inner face of the inner tubular member 10b, said bearing member 26b_ conveniently being moulded from low friction plastics material such as nylon, being retained in position against downward movement by a swaged region of the inner tubular member 10b. at its upper end portion, and against upward movement by engagement with the sealing gasket.
Thus the bearing assembly 26b derives its radial support from the inner tubular member 10b, as distinct from the embodiment shown in Figure 2, in which the bearing member 26 derives its radial support from the housing 16.
In the first embodiment the bearing member 26b_ carries a load spreading member in the form of a metal washer 46, around which is located a plastics moulding 48 affording a rebound stop for the piston of the shock absorber. Additionally, the plastics moulding, being clipped onto the bearing member 26b_ as shown, also serves to retain a piston ring 49 on the piston rod 6b, the piston road being located between an inner annulus of the metal washer 46, and a tapered circumferential face of the bearing member 26b_.
The head assembly 40c which is the second embodiment of the invention is shown in Figure 4, in which similar numerals with the suffix c. have been used, and comprises a location means afforded by an annular metal washer 42c. having a short axial skirt 43c. at a radially outer portion, the washer being trapped between an upper end face of the inner tubular member 10c. and a rolled margin 15c. of the outer member 14c, the skirt 43c. being trapped between the inner and outer faces of the two tubular members. In this manner the tubular members are held together at their upper ends relatively simply, the member 42c. carrying an oil seal 22c. which is trapped at a radially outer flange 60 between the washer 42c. and the roller margin 15c.
The oil seal 22c. is provided on an axially outer part thereof with a radial dirt lip 62, and carries, at an axially inner part, a low friction plastic ring 64 which is held in engagement with the piston rod 6c.
Conveniently the oil seal 22c. is moulded around the metal washer 42c. to prevent egress of oil therebetween, the compression of the upper portion of the oil seal against the washer 42c. by the rolled margin 15c. completing the seal.
A bearing assembly 26£ comprises a first bearing member 66 in the form of a moulded body of a material which is relatively strong, and provides the requisite strength to the bearing assembly, such as glass-filled nylon and which derives its radial support from its inner tubular member 10c. However the bearing assembly also comprises a second bearing member 76, of a low friction material such as PTFE or graphite, which derives its radial support from the first bearing member 66, the second bearing member 76 being located within a circumferential recess 68 on the inner face of the first bearing member 66, a lip 78 of the second bearing member extending into a circumferential channel 70 of the first bearing member.
Located between an upper edge of the second bearing member 76 and a radial flange 72 of the first bearing member (said radial flange 72 defining the upper margins of the recess 68) there is provided a piston ring 86, said piston ring being of low friction material such as PTFE, and being capable of longitudinal (floating) movement in close confinement with the outer surface of the piston rod 6c.
Mounted on a lower end portion of the first bearing member 66 is a plastics moulding 48c. which affords a rebound stop for the piston of the shock absorber, said rebound stop comprising a radial lip 49 which is snap-fitted into a radial channel 74 of the first bearing member 66.
It will of course be appreciated that the moulded body 66 may be constituted by more than one component if desired, and that a load spreading member, similar to the member 66, may be interposed between the body 66 and the rebound stop 66.
As will be seen from Figure 4, an oil flow channel is provided between the piston 6c. and the inner tubular member 10c. to the space between the inner tubular member and the outer tubular member 14c, said oil flow channel comprising a section A extending between the piston rod 6£ and the inner circumferential surface of the second bearing member 76, a second section B extending between the outer surfaces of the piston ring 86 and the bearing assembly, a third section C extending between the bearing assembly and the oil seal 22c, and a fourth section D afforded by radial depressions 44c in the underside of the metal washer 42c.

Claims

1. In or for a shock absorber of the kind comprising a piston (8) slidably mounted in an inner tubular member (10), said inner tubular member being located within, and generally coaxially of, an outer tubular member (14), a head assembly (12) comprising location means 16 by which the inner and outer tubular members (10, 14) are securely located together, bearing means 26 for a piston rod (6) of said piston, and sealing means (22) for said piston rod, wherein the location means comprises an annular location member (42), an outer edge portion 43 of which in use is trapped between the inner and outer tubular members (10, 14).
2. A head assembly according to Claim 1 wherein the annular member (42) comprises an axial skirt 43 at a radially outer portion, which in use is trapped between the side walls of the tubular members (10, 14).
3. A head assembly according to one of Claims 1 and 2 wherein the annular member comprises a central circular portion.
4. A head assembly according to any one of the preceding claims wherein the location member is provided with channel means 44 to permit flow of hydraulic fluid from an inner portion into communication with the interior of the inner member (10) to an outer portion in communication with the space between the inner and outer tubular members.
5. A head assembly according to any one of the preceding claims wherein the sealing means comprises a sealing member (22) which is supported directly by said location member (42).
6. A head assembly according to any one of the preceding claims wherein the bearing means (26) is adapted to be supported by the inner tubular member (10).
7. A head assembly according to Claim 6 wherein the bearing means (26) is adapted to be supported in a radial direction between the piston rod (6) and the inner tubular member (10).
8. A head assembly according to any one of Claim 6 and 7 wherein the bearing means (26) is adapted to be supported against movement in a first axial direction by location within an outwardly-swaged margin of the inner tubular member (10), and in a second radial direction by the location member 42.
9. A head assembly according to any one of Claims 6, 7 and 8 wherein the bearing means comprises a body (68) moulded from plastics material and a bearing element (76) carried by the moulded body.
10. A head assembly according to any one of the preceding claims comprising a rebound stop (48).
11. A head assembly according to Claim 10 wherein the rebound stop is snap-fitted to the bearing means (26).
12. A head assembly for a shock absorber of the kind specified, in which the bearing means (26) is supported by the inner tubular member (10).
13. A head assembly for a shock absorber of the kind specified, in which the sealing means comprises a sealing member (22) mounted on a support means (42) engaged directly between the inner and outer tubular members (10, 14).
14. A head assembly for a shock absorber of the kind specified, comprising a rebound stop (48) carried by the head assembly.
15. A head assembly according to Claim 14 wherein the rebound stop (48) is carried by the bearing means (26).
16. A head assembly of the kind specified, wherein an oil flow path A, B, Cis provided between the bearing means (26) and the piston rod (6), said oil flow path extending to channels or grooves (44) provided on the underside of the location means (42).
17. " A shock absorber of the kind specified, the head assembly being in accordance with any one of Claims 1 to 16.
18. A head assembly for a shock absorber of the kind specified, constructed and arranged substantially as hereinbefore described with reference to Figure 3 or 4 of the accompanying drawings.
19. A shock absorber of the kind specified constructed and arranged substantially and as hereinbefore described with reference to Figure 3 or 4 of the accompanying drawings.
PCT/GB1992/002311 1991-12-17 1992-12-14 Shock absorber, and head assembly therefor WO1993012362A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9126728.6 1991-12-17
GB919126728A GB9126728D0 (en) 1991-12-17 1991-12-17 Improvements relating to shock absorbers

Publications (1)

Publication Number Publication Date
WO1993012362A1 true WO1993012362A1 (en) 1993-06-24

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Application Number Title Priority Date Filing Date
PCT/GB1992/002311 WO1993012362A1 (en) 1991-12-17 1992-12-14 Shock absorber, and head assembly therefor

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AU (1) AU3092892A (en)
GB (1) GB9126728D0 (en)
WO (1) WO1993012362A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794743A (en) * 1995-04-08 1998-08-18 Fichtel & Sachs Ag Shock absorber or vibration damper
DE10026360A1 (en) * 2000-05-27 2002-02-14 Volkswagen Ag Piston rod guide device for e.g. oscillation dampers in motor vehicles has sealing ring in first holder part of guide, and sliding sleeve pressed into second holder part from inside of container
US6820729B2 (en) * 2002-10-29 2004-11-23 Arvinmeritor Technology, Llc Shock absorber cylinder head wiper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025874A1 (en) * 1979-09-25 1981-04-01 August Bilstein GmbH & Co. KG Hydropneumatic vibration damper, especially for motor vehicle front axle struts
DE3114808A1 (en) * 1981-04-11 1982-10-28 Boge Gmbh, 5208 Eitorf Hydropneumatic two-tube vibration damper, in particular for a motor vehicle suspension leg
FR2524098A1 (en) * 1982-03-23 1983-09-30 Bilstein August Gmbh Co Kg TWO-TUBE HYDROPNEUMATIC SHOCK ABSORBER, PARTICULARLY AS FRONT AXLE LEG FOR MOTOR VEHICLES
EP0330449A2 (en) * 1988-02-22 1989-08-30 Unisia Jecs Corporation Shock absorber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025874A1 (en) * 1979-09-25 1981-04-01 August Bilstein GmbH & Co. KG Hydropneumatic vibration damper, especially for motor vehicle front axle struts
DE3114808A1 (en) * 1981-04-11 1982-10-28 Boge Gmbh, 5208 Eitorf Hydropneumatic two-tube vibration damper, in particular for a motor vehicle suspension leg
FR2524098A1 (en) * 1982-03-23 1983-09-30 Bilstein August Gmbh Co Kg TWO-TUBE HYDROPNEUMATIC SHOCK ABSORBER, PARTICULARLY AS FRONT AXLE LEG FOR MOTOR VEHICLES
EP0330449A2 (en) * 1988-02-22 1989-08-30 Unisia Jecs Corporation Shock absorber

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 5, no. 101 (M-76)(773) 30 June 1981 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794743A (en) * 1995-04-08 1998-08-18 Fichtel & Sachs Ag Shock absorber or vibration damper
DE10026360A1 (en) * 2000-05-27 2002-02-14 Volkswagen Ag Piston rod guide device for e.g. oscillation dampers in motor vehicles has sealing ring in first holder part of guide, and sliding sleeve pressed into second holder part from inside of container
DE10026360B4 (en) * 2000-05-27 2015-09-24 Volkswagen Ag Piston rod guide
US6820729B2 (en) * 2002-10-29 2004-11-23 Arvinmeritor Technology, Llc Shock absorber cylinder head wiper

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Publication number Publication date
GB9126728D0 (en) 1992-02-12
AU3092892A (en) 1993-07-19

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