US3750856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable, pressure compensating shock absorber/buffer
Assignee: Individual
•
Filing: 1971-12-09
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Granted: 1973-08-07
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Expires: 1991-12-09
Abstract
Abstract A rectilinear piston and cylinder shock absorber has an inner cylinder sleeve responsive to overload against the piston and/or excessive piston velocity to throttle hydraulic fluid displacement from the piston chamber through a metering system including a cooperating fixed cylinder member. The kinetic energy range of the shock absorber may be readily adjusted.
Inventors
- 👤 G Kenworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/185; F16F9/50; F16F9/512
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A shock absorber/buffer unit comprising: means defining a housing enclosing a hydraulic fluid reservoir; a cylinder structure comprising relatively shiftable telescopically related tubular members having radial metering orifices at longitudinally spaced intervals normally aligned to provide passages for displacement therethrough of hydraulic fluid between the chamber and reservoir; one of said members being located interiorly of the other of said members and the other of said members being fixedly mounted relative to said housing; a reciprocable piston in said working chamber within said one of said members and reciprocable therein in compression and return strokes for displacement of hydraulic fluid through said passages between said chamber and reservoir; said one member being reciprocable relative to said other member and to said piston; and a pressure-responsive shoulder area on that end portion of said one member toward which the piston moves in compression stroke so that pressure generated by the piston in the compression stroke drives said one member to move in the opposite direction relative to the piston to effect throttling of said orifice passages.
Claim 2
Dependent Claim
175 words
A shock absorber/buffer unit comprising: means defining a housing enclosing a hydraulic fluid reservoir; a cylinder structure comprising relatively shiftable telescopically related tubular members having radial metering orifices at longitudinally spaced intervals normally aligned to provide passages for displacement therethrough of hydraulic fluid between the chamber and reservoir; one of said members being located interiorly of the other of said members and the other of said members being fixedly mounted relative to said housing; a reciprocable piston in said working chamber within said one of said members and reciprocable therein in compression and return strokes for displacement of hydraulic fluid through said passages between said chamber and reservoir; said one member being reciprocable relative to said other member and to said piston; and a pressure-responsive shoulder area on that end portion of said one member toward which the piston moves in compression stroke so that pressure generated by the piston in the compression stroke drives said one member to move in the opposite direction relative to the piston to effect throttling of said orifice passages.
Claim 3
Dependent Claim
29 words
A unit according to claim 1, including means normally biasing said one member into a position relative to said othEr member for relatively unthrottled communication between the respective orifices.
Claim 4
Dependent Claim
18 words
A unit according to claim 2, including means controlling said members to maintain the respective orifices in alignment.
Claim 5
Dependent Claim
38 words
A unit according to claim 2, wherein said members have facing interfaces providing communication gap therebetween for said orifices, and said gap being progressively diminished in the pressure-responsive shifting of said one member relative to said other member.
Claim 6
Dependent Claim
17 words
A unit according to claim 2, including means for adjusting the biasing thrust of said biasing means.
Claim 7
Dependent Claim
22 words
A unit according to claim 1, including means for limiting the effect of said pressure-responsive means in effecting throttling of said passages.
Claim 8
Dependent Claim
141 words
A unit according to claim 1, wherein said means defining a housing comprise a tubular member and opposite end closures engaged therewith including means securing the end closures to the respective opposite ends of the tubular member, said other member having its opposite ends fixedly connected to the respective end closures and defines thereabout a reservoir space with said tubular housing member, the inner of said members comprising a sleeve providing said working chamber, means normally biasing said sleeve member into position relative to the fixedly connected member and wherein said passages are relatively unthrottled, said pressure generated by the piston in the compression stroke causing the sleeve to move in opposition to said biasing means to effect said throttling, and yieldable means normally maintaining a limited pressure on hydraulic fluid in said reservoir for positive replenishment of said working chamber.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |