Patent US4048905A successfully refreshed from Google Patents.
US4048905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable orifice hydraulic snubber
Assignee: Boeing Co
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Filing: 1976-03-29
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Granted: 1977-09-20
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Expires: 1996-03-29
Abstract
Abstract This invention is a piston-cylinder hydraulic snubbing device to arrest or resist motion. The invention may be utilized as a snubbing device alone, or it may be incorporated into a hydraulically actuated piston-cylinder assembly. The principal feature is that an orifice, through which hydraulic fluid is forced, is in the form of a gap between the ends of a piston ring, which gap is varied by engagement of the ring with a tapered bore in the cylinder.
Inventors
- 👤 Richard Ervin Souslin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:11
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48; F16F9/49; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A piston and cylinder assembly comprising: a cylinder having a closed end, the internal diameter of said cylinder increasing, over a portion of the length, with distance from said closed end; a piston movable in said cylinder, said piston being provided with an annular piston-ring groove; a piston ring in said groove and in contact with said cylinder having a circumference such that its ends form an opening therebetween, which opening is determined by the diameter of said cylinder with which the ring is in contact.
Claim 2
Dependent Claim
86 words
A piston and cylinder assembly comprising: a cylinder having a closed end, the internal diameter of said cylinder increasing, over a portion of the length, with distance from said closed end; a piston movable in said cylinder, said piston being provided with an annular piston-ring groove; a piston ring in said groove and in contact with said cylinder having a circumference such that its ends form an opening therebetween, which opening is determined by the diameter of said cylinder with which the ring is in contact.
Claim 3
Dependent Claim
68 words
A hydraulic snubbing arrangement comprising relatively reciprocal parts, one of which has a closed-end chamber of circular cross-section and of nonuniform diameter; the second of which is of circular cross-section and is arranged to enter said chamber, and which is provided with an annular groove; and a piston ring in said groove, said ring having a gap between its ends providing for escape of fluid from said chamber.
Claim 4
Dependent Claim
68 words
A hydraulic snubbing arrangement comprising relatively reciprocal parts, one of which has a closed-end chamber of circular cross-section and of nonuniform diameter; the second of which is of circular cross-section and is arranged to enter said chamber, and which is provided with an annular groove; and a piston ring in said groove, said ring having a gap between its ends providing for escape of fluid from said chamber.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |