US3596895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective member
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-04-14
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Granted: 1971-08-03
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Expires: 1989-04-14
Abstract
Abstract A protective member of flexible resilient material which is retained on the surface of a member of a fluid spring assembly to prevent the substantial accumulation of harmful abrading debris which may damage the flexible resilient spring member during the operation of the spring assembly. The protective member is particularly useful in a vehicle suspension system.
Inventors
- 👤 Arthur B Hirtreiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:51
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/05; B; B60; B60G; B60G11/00; B60G11/26; B60G11/28; B60G2202/00; B60G2202/10; B60G2202/14; B60G2202/143; B60G2202/15; B60G2202/152; B60G2204/00; B60G2204/40; B60G2204/45; B60G2204/4502
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
231 words
A protective member of flexible resilient material superposed over and snugly fitting at least a portion of the outer peripheral surface of a generally cylindrical relatively rigid piston member of a fluid pressure system, such system being of the type in which one of the peripheral end portions of a flexible resilient hollow spring member is attached to the piston member and the other end portion is attached to a spaced retaining element to form a fluidtight chamber capable of supporting a load, the piston member and retaining element being movable with respect to each other to cause a change in the configuration of the spring member and in the pressure of the fluid contained in the chamber, said piston member moving within said spring member to cause a rolling motion therein, said protective member being retained on said piston member in such a manner that when the piston member travels within said spring member to cause the rolling motion therein the resulting movement of said spring member over said protective member causes a slight flexing in said protective member which deflects and/or flakes off harmful abrading debris from the surface of the piston member to eliminate any substantial accumulation of such debris and also provides a barrier to prevent the migration of such debris along the outer surface of said piston member during the operation of the fluid pressure system.
Claim 2
Dependent Claim
231 words
A protective member of flexible resilient material superposed over and snugly fitting at least a portion of the outer peripheral surface of a generally cylindrical relatively rigid piston member of a fluid pressure system, such system being of the type in which one of the peripheral end portions of a flexible resilient hollow spring member is attached to the piston member and the other end portion is attached to a spaced retaining element to form a fluidtight chamber capable of supporting a load, the piston member and retaining element being movable with respect to each other to cause a change in the configuration of the spring member and in the pressure of the fluid contained in the chamber, said piston member moving within said spring member to cause a rolling motion therein, said protective member being retained on said piston member in such a manner that when the piston member travels within said spring member to cause the rolling motion therein the resulting movement of said spring member over said protective member causes a slight flexing in said protective member which deflects and/or flakes off harmful abrading debris from the surface of the piston member to eliminate any substantial accumulation of such debris and also provides a barrier to prevent the migration of such debris along the outer surface of said piston member during the operation of the fluid pressure system.
Claim 3
Dependent Claim
41 words
The protective member as claimed in claim 1 wherein said protective member covers at least the outer peripheral surface of the end portion of said piston member that travels within said spring member during the operation of the fluid pressure system.
Claim 4
Dependent Claim
27 words
The protective member as claimed in claim 1 wherein said protective member covers at least the central portion of the outer peripheral surface of said piston member.
Claim 5
Dependent Claim
23 words
The protective member as claimed in claim 1 wherein said protective member covers substantially the entire outer peripheral surface of said piston member.
Claim 6
Dependent Claim
28 words
The protective member as claimed in claim 1 wherein the thickness of said protective member is from about 0.030 of an inch to about 0.375 of an inch.
Claim 7
Dependent Claim
28 words
The protective member as claimed in claim 1 wherein the thickness of said protective member is from about 0.060 of an inch to about 0.250 of an inch.
Claim 8
Dependent Claim
41 words
The protective member as claimed in claim 1 wherein said protective member is retainEd on the outer peripheral surface of the end portion of said piston member that moves within said spring member during the operation of the fluid pressure system.
Claim 9
Dependent Claim
35 words
The protective member as claimed in claim 1 wherein the thickness of said protective member is greater than 0.090 inch and said protective member is adhered to the outer peripheral surface of said piston member.
Claim 10
Dependent Claim
18 words
The protective member as claimed in claim 1 wherein the protective member includes a textile fabric reinforcement therein.
Claim 11
Dependent Claim
35 words
The protective member as claimed in claim 1 wherein the flexible resilient material is polymeric material of relatively low modulus and is selected from the group consisting of natural rubber, synthetic rubber, and polyvinyl chloride.
Claim 12
Dependent Claim
26 words
The protective member as claimed in claim 1 wherein the flexible resilient polymeric material is selected from the group consisting of polyurethane elastomers and polyvinyl chloride.
Claim 13
Dependent Claim
221 words
In a fluid pressure system including A. a flexible resilient hollow spring member; B. a pair of spaced retaining elements with each being attached to a peripheral end portion of said spring member to form a fluid tight chamber capable of supporting a load with said elements being movable relative to each other to cause a change in the configuration of the spring member and in the pressure of the fluid in the chamber, at least one of said elements being a generally cylindrical relatively rigid piston member which moves within said spring member to cause a rolling motion therein; and C. the improvement comprising a protective member of flexible resilient material superposed over and snugly fitting at least a portion of the outer peripheral surface of said piston member and retained thereon in such a manner that when the piston member travels within said spring member to cause the rolling motion therein, the resulting movement of said spring member over said protective member causes a slight flexing in said protective member which deflects and/or flakes off harmful abrading debris from the surface of the piston member to eliminate any substantial accumulation of such debris and also provides a barrier to the migration of such debris along the outer surface of said piston during the operation of the fluid pressure system.
Claim 14
Dependent Claim
221 words
In a fluid pressure system including A. a flexible resilient hollow spring member; B. a pair of spaced retaining elements with each being attached to a peripheral end portion of said spring member to form a fluid tight chamber capable of supporting a load with said elements being movable relative to each other to cause a change in the configuration of the spring member and in the pressure of the fluid in the chamber, at least one of said elements being a generally cylindrical relatively rigid piston member which moves within said spring member to cause a rolling motion therein; and C. the improvement comprising a protective member of flexible resilient material superposed over and snugly fitting at least a portion of the outer peripheral surface of said piston member and retained thereon in such a manner that when the piston member travels within said spring member to cause the rolling motion therein, the resulting movement of said spring member over said protective member causes a slight flexing in said protective member which deflects and/or flakes off harmful abrading debris from the surface of the piston member to eliminate any substantial accumulation of such debris and also provides a barrier to the migration of such debris along the outer surface of said piston during the operation of the fluid pressure system.
Claim 15
Dependent Claim
32 words
The system as claimed in claim 12 wherein each said retaining element comprises a generally cylindrical relatively rigid piston member and one said protective member is retained on each said piston member.
Claim 16
Dependent Claim
41 words
The protective member as claimed in claim 12 wherein said protective member covers at least the outer peripheral surface of the end portion of said piston member that moves within said spring member during the operation of the fluid pressure system.
Claim 17
Dependent Claim
27 words
The protective member as claimed in claim 12 wherein said protective member covers at least the central portion of the outer peripheral surface of said piston member.
Claim 18
Dependent Claim
23 words
The protective member as claimed in claim 12 wherein said protective member covers substantially the entire outer peripheral surface of said piston member.
Claim 19
Dependent Claim
28 words
The protective member as claimed in claim 12 wherein the thickness of said protective member is from about 0.030 of an inch to about 0.375 of an inch.
Claim 20
Dependent Claim
28 words
The protective member as claimed in claim 12 wherein the thickness of said protective member is from about 0.060 of an inch to about 0.250 of an inch.
Claim 21
Dependent Claim
41 words
The protective member as claimed in claim 12 wherein said protective member is retained on the outer peripheral surface of the end portion of said piston member that moves within said spring member during the operation of the fluid pressure system.
Claim 22
Dependent Claim
37 words
The protective member as claimed in claim 12 wherein the thickness of said protective member is greater than 0.090 of an inch and said protective member is adhered to the outer peripheral surface of said piston member.
Claim 23
Dependent Claim
18 words
The protective member as claimed in claim 12 wherein the protective member includes a textile fabRic reinforcement therein.
Claim 24
Dependent Claim
34 words
The protective member as claimed in claim 12 wherein the flexible resilient material is polymeric material of relatively low modulus and selected from the group consisting of natural rubber, synthetic rubber, and polyvinyl chloride.
Claim 25
Dependent Claim
26 words
The protective member as claimed in claim 12 wherein the flexible resilient polymeric material is selected from the group consisting of polyurethane elastomers and polyvinyl chloride.
References Cited (Backward Citations)
US2443433A
Cited
US3140880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |