US4121704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly for a piston of a telescopic damper
Assignee: Girling Ltd
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Filing: 1977-03-21
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Granted: 1978-10-24
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Expires: 1997-03-21
Abstract
Abstract In a valve assembly for a telescopic damper, comprising a piston with flow channels controlled by valve members located on opposite sides of the piston, axially directed, annular valve seats which cooperate with the valve members are provided on separately formed seat members positioned against the side faces of the piston and having apertures aligned with the piston channels.
Inventors
- 👤 Lawrence George Nicholls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:18
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/348; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A valve assembly for a telescopic damper, comprising a piston member, first and second flow channels extending through said piston member between opposite axial sides of said piston member, said first and second flow channels having inlet and outlet ends respective at one side of said piston member and outlet and inlet ends respectively at the other side of said piston member, a pair of separate valve seat members located one on each side of said piston member in face-to-face abutment with a respective opposide side of said piston, said seat members having flow apertures therethrough and each valve seat member presenting an annular seat axially directed away from said piston, and a pair of flexibly resilient annular valve members, each valve member having an inner periphery secured with respect to a respective seat member and a portion adjacent the outer periphery thereof bearing against said annular seat of the associated seat member, said seat and valve members permitting flow through said first and second channels in opposite respective directions through said piston member.
Claim 2
Dependent Claim
174 words
A valve assembly for a telescopic damper, comprising a piston member, first and second flow channels extending through said piston member between opposite axial sides of said piston member, said first and second flow channels having inlet and outlet ends respective at one side of said piston member and outlet and inlet ends respectively at the other side of said piston member, a pair of separate valve seat members located one on each side of said piston member in face-to-face abutment with a respective opposide side of said piston, said seat members having flow apertures therethrough and each valve seat member presenting an annular seat axially directed away from said piston, and a pair of flexibly resilient annular valve members, each valve member having an inner periphery secured with respect to a respective seat member and a portion adjacent the outer periphery thereof bearing against said annular seat of the associated seat member, said seat and valve members permitting flow through said first and second channels in opposite respective directions through said piston member.
Claim 3
Dependent Claim
44 words
A valve assembly according to claim 1, wherein the inlet end of said first and second flow channels extending through said piston are permanently open, said flow apertures in said valve seat members being aligned with the outlet ends of the respective flow channels.
Claim 4
Dependent Claim
29 words
A valve assembly according to claim 1, wherein a stop element is associated with each valve member for limiting movement of the valve member away from the valve seat.
Claim 5
Dependent Claim
30 words
A valve assembly according to claim 1, wherein one or more orifices are provided in at least one of said valve members to permit small fluid flows through the assembly.
Claim 6
Dependent Claim
41 words
A telescopic damper according to claim 1, wherein the inner periphery of each valve member is separated from the associated seat member by a spacer of preselected thickness to provide a predetermined pre-stress of the valve member against the valve seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |