Patent US3870286A successfully refreshed from Google Patents.
US3870286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid springs, particularly for vehicles
Assignee: ThyssenKrupp Bilstein GmbH
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Filing: 1973-10-17
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Granted: 1975-03-11
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Expires: 1993-10-17
Abstract
Abstract In a fluid spring, preferably a gas spring, for motor vehicles an elastic, internally reinforced rolling sleeve is clamped at each end between two components connected to two masses which are to be resiliently held apart. The sleeve is formed as a portion of a continuously produced cylindrical tube of constant wall thickness. At least one end of the sleeve is preferably incurved or recurved where it is clamped to the associated component and the axial end faces outwardly of the gas spring and not towards the internal chamber. The sleeve may also be clamped at at least one position between its two ends to provide additional support.
Inventors
- 👤 Jean Herbert Willich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:22
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/084; B; B60; B60G; B60G11/00; B60G11/26; B60G11/27; F16F9/02; F16F9/04; F16F9/0454
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A fluid spring, particularly for vehicles, comprising two components arranged to be connected to two masses which are to be resiliently held apart, and an elastic, internally reinforced, rolling sleeve clamped at each end in gas-tight sealing relationship to the respective components, wherein the reinforced rolling sleeve is a portion of a continuously manufactured cylindrical tube of constant wall thickness cut to a desired length, and wherein the ends of the rolling sleeve are secured by annular clamping means.
Claim 2
Dependent Claim
79 words
A fluid spring, particularly for vehicles, comprising two components arranged to be connected to two masses which are to be resiliently held apart, and an elastic, internally reinforced, rolling sleeve clamped at each end in gas-tight sealing relationship to the respective components, wherein the reinforced rolling sleeve is a portion of a continuously manufactured cylindrical tube of constant wall thickness cut to a desired length, and wherein the ends of the rolling sleeve are secured by annular clamping means.
Claim 3
Dependent Claim
34 words
A fluid spring as claimed in claim 1, in which one end of the rolling sleeve is incurved and is secured by a clamping ring which engages against the internal surface of the sleeve.
Claim 4
Dependent Claim
36 words
A fluid spring as claimed in claim 2, in which the radially outwardly facing surface of the rolling sleeve is enclosed by a casing which additionally forms the clamping means for one end of the sleeve.
Claim 5
Dependent Claim
59 words
A fluid spring as claimed in claim 1, in which at least one end of the rolling sleeve is recurved inwardly and has the internal surface of its recurved end portion in contact with one of said components and is secured to said component by a clamping ring in engagement with the external surface of said recurved end portion.
Claim 6
Dependent Claim
46 words
A fluid spring as claimed in claim 1, in which the clamping diameters of the components which have the ends of the rolling sleeve secured thereto are of different size, and the diameter of the rolling sleeve is equal to the smaller of said clamping diameters.
Claim 7
Dependent Claim
43 words
A fluid spring as claimed in claim 1, in which the rolling sleeve in addition to being secured at its ends is also secured at at least one region between its ends to a support ring by means of further annular clamping means.
Claim 8
Dependent Claim
31 words
A fluid spring as claimed in claim 6, in which each of the annular clamping means is in engagement with the external surface of the rolling sleeve which is sub-divided thereby.
Claim 9
Dependent Claim
50 words
A fluid spring as claimed in claim 1, in which one end of the reinforced rolling sleeve is secured to the working cylinder of a shock absorber and the other end of the sleeve is secured to a cap which is carried by the piston rod of the shock absorber.
References Cited (Backward Citations)
US3191964A
Cited
US3497198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |