US3891199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic shock absorber
Assignee: ThyssenKrupp Bilstein GmbH
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Filing: 1972-09-21
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Granted: 1975-06-24
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Expires: 1992-09-21
Abstract
Abstract A hydraulic shock absorber comprising two telescopically movable tubes containing damping liquid and a resilient bag encircling the tubes and receiving damping liquid expelled from the tubes through throttling ports upon telescopic compression of the tubes is made adjustable in respect of its damping characteristics by the provision of an adjustable setting device which extend through one end of one of the tubes and which may include a screw-fitted element. Adjustment of the throttling ports may be effected by a plate, disc, or tapered pin being moved relative to ports. The invention also provides a shock absorber with a twostage or three-stage throttling action, whether or not the shock absorber has adjustability, by providing two or three separate areas of throttling control in the shock absorber, these areas being connected hydraulically in series and/or in parallel.
Inventors
- 👤 Jean Herbert Willich
- 👤 Christian Pfeil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:26
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32; F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/16; F16F2230/00; F16F2230/10; F16F2230/105
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
A hydraulic shock absorber comprising two telescopically engageable tubes containing damping liquid, a resilient bag disposed exteriorly of said tubes and attached to spaced-apart portions of said tubes in fluid-sealing engagement and encircling outer peripheral portions of said tubes interposed the points of bag attachment to said tubes so as to define a damping liquid storage chamber therewith, said storage chamber communicating with said damping liquid in said tubes by means of a throttling port whereby said damping liquid is received in said storage chamber during telescopic movement of one of said tubes into the other in the course of a tube compression stroke, and means for adjusting the effective fluid-conveying cross-section of the throttling port disposed adjacent said throttling port and extending sealingly from the interior of one of said tubes so as to be engageable exteriorly of said shock absorber; said resilient bag acting to return said damping fluid to said tubes through said throttling port and to return said tubes to the extended condition following said compression stroke.
Claim 2
Dependent Claim
171 words
A hydraulic shock absorber comprising two telescopically engageable tubes containing damping liquid, a resilient bag disposed exteriorly of said tubes and attached to spaced-apart portions of said tubes in fluid-sealing engagement and encircling outer peripheral portions of said tubes interposed the points of bag attachment to said tubes so as to define a damping liquid storage chamber therewith, said storage chamber communicating with said damping liquid in said tubes by means of a throttling port whereby said damping liquid is received in said storage chamber during telescopic movement of one of said tubes into the other in the course of a tube compression stroke, and means for adjusting the effective fluid-conveying cross-section of the throttling port disposed adjacent said throttling port and extending sealingly from the interior of one of said tubes so as to be engageable exteriorly of said shock absorber; said resilient bag acting to return said damping fluid to said tubes through said throttling port and to return said tubes to the extended condition following said compression stroke.
Claim 3
Dependent Claim
23 words
A shock absorber according to claim 1, in which the adjusting means comprises a setting member arranged co-axially with the telescopically engageable tubes.
Claim 4
Dependent Claim
27 words
A shock absorber according to claim 1, in which the effective cross-section of said throttling port is dependent solely on the axial position of the adjusting means.
Claim 5
Dependent Claim
59 words
A shock absorber according to claim 1 in which the portion of said adjusting means engageable exteriorly of said shock absorber comprises screw adjustment means extending from the interior of one of said tubes and secured against rotation by means of a nut urged against an exterior surface portion of said tube member from which said adjusting means extends.
Claim 6
Dependent Claim
37 words
A shock absorber according to claim 1 in which the adjusting means includes a shaft portion which carries a sealing ring to prevent leakage of said damping liquid from the tube from which said adjusting means extends.
Claim 7
Dependent Claim
32 words
A shock absorber according to claim 1 in which the tube opening through which the adjusting means extends includes protective sleeve housing means encircling and extending the length of the adjusting means.
Claim 8
Dependent Claim
36 words
A shock absorber according to claim 1 in which said trottling port comprises an aperture in one of said tubes and the adjusting means comprises a spring loaded member which is operative to block said aperture.
Claim 9
Dependent Claim
58 words
The shock absorber of claim 1 in which said throttling port comprises an aperture in one of said tubes and the adjusting means comprises a spring loaded plate in said one tube connected to the adjusting means portion engageable exteriorly of said shock absorber, said portion being operative to alter the tension in the spring loading said plate.
Claim 10
Dependent Claim
67 words
A shock absorber according to claim 1 in which said spring loaded plate has an aperture therein, a check valve for said aperture preventing flow of damping fluid through said aperture in the course of a compression stroke of said telescoping tubes and permitting flow of damping fluid from said resilient bag to said telescoping tubes in the course of an extension stroke of said telescoping tubes.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |