US3134460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic shock absorber with improved valving
Assignee: Individual
•
Filing: 1962-05-23
•
Granted: 1964-05-26
•
Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Bourcier Christian Marie Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:31
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/09; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/348; F16F9/3484; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/148; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DIRECT-ACTING TELESCOPING CYLINDER-AND-PISTON SHOCK ABSORBER COMPRISING A CYLINDER ENCLOSING A WORKING CHAMBER CONTAINING A DAMPING LIQUID; A WORKING PISTON DISPOSED FOR RECIPROCATION IN SAID DAMPING LIQUID WITHIN SAID CHAMBER AND HAVING A PISTON ROD FIXEDLY SECURED THERETO AND EXTENDING THROUGH A PACKED OPENING IN ONE END OF SAID CYLINDER; VALVING MEANS IN THE PISTON FOR THE CONTROLLED PASSAGE OF DAMPING LIQUID IN OPPOSITE DIRECTIONS THROUGH THE PISTON DURING RECIPROCATION OF THE PISTON IN THE CYLINDER; SAID VALVING MEANS COMPRISING A CIRCULAR SERIES OF PASSAGEWAYS THROUGH SAID PISTON, SAID PASSAGEWAYS HAVING DISCHARGE ORIFICES THROUGH A SUBSTANTIALLY FLAT FACE OF THE PISTON; AND A STACK OF FLEXIBLE VALVE DISCS SECURED CENTRALLY TO SAID PISTON AND HAVING ITS MARGINAL PORTION OVERLYING AT LEAST PARTIALLY SAID ORIFICES, SAID STACK COMPRISING DISCS OF DECREASING DIAMETER AND INCREASING
Claim 2
Dependent Claim
133 words
A DIRECT-ACTING TELESCOPING CYLINDER-AND-PISTON SHOCK ABSORBER COMPRISING A CYLINDER ENCLOSING A WORKING CHAMBER CONTAINING A DAMPING LIQUID; A WORKING PISTON DISPOSED FOR RECIPROCATION IN SAID DAMPING LIQUID WITHIN SAID CHAMBER AND HAVING A PISTON ROD FIXEDLY SECURED THERETO AND EXTENDING THROUGH A PACKED OPENING IN ONE END OF SAID CYLINDER; VALVING MEANS IN THE PISTON FOR THE CONTROLLED PASSAGE OF DAMPING LIQUID IN OPPOSITE DIRECTIONS THROUGH THE PISTON DURING RECIPROCATION OF THE PISTON IN THE CYLINDER; SAID VALVING MEANS COMPRISING A CIRCULAR SERIES OF PASSAGEWAYS THROUGH SAID PISTON, SAID PASSAGEWAYS HAVING DISCHARGE ORIFICES THROUGH A SUBSTANTIALLY FLAT FACE OF THE PISTON; AND A STACK OF FLEXIBLE VALVE DISCS SECURED CENTRALLY TO SAID PISTON AND HAVING ITS MARGINAL PORTION OVERLYING AT LEAST PARTIALLY SAID ORIFICES, SAID STACK COMPRISING DISCS OF DECREASING DIAMETER AND INCREASING
References Cited (Backward Citations)
US919036A
Cited
US2225986A
Cited
US2327295A
Cited
US2646859A
Cited
US2740500A
Cited
US2696278A
Cited
US3003594A
Cited
US2987146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |