Patent US3940060A successfully refreshed from Google Patents.
US3348835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic shock absorber
Assignee: Individual
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Filing: 1965-06-01
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Granted: 1967-10-24
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Charles J Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:51
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/0209; F16F9/0218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A VEHICLE SHOCK ABSORBER COMPRISING A CYLINDER FOR ATTACHMENT TO A VEHICLE AXLE AND A PISTON THEREIN FOR ATTACHMENT TO A VEHICLE CHASSIS, SAID PISTON CONTAINING A SMALL ORIFICE FOR PERMITTING AIR TO FLOW FROM ONE SIDE OF THE PISTON TO THE OTHER IN SAID CYLINDER, AND A ONE-WAY CHECK VALVE FOR ADMITTING AIR IN ONE SIDE OF THE CYLINDER ONLY DURING COMPRESSION OF THE VEHICLE SPRING AND WHICH IS CLOSED AS THE RESULT OF REBOUND MOVEMENT AND TRAVEL OF THE PISTON IN AN OPPOSITE DIRECTION, THERE BEING NO OTHER OPENINGS TO THE ATMOSPHERE IN SAID CYLINDER, WHEREBY THE AIR PRESSURE THEREIN WILL PROGRESSIVELY INCREASE AS THE RESULT OF RECIPROCATION OF THE PISTON UNTIL THE COMPRESSIVE FORCES DIMINISH TO A POINT WHERE THEY NO LONGER ACTIVATE SAID CHECK VALVE.
Claim 2
Dependent Claim
129 words
A VEHICLE SHOCK ABSORBER COMPRISING A CYLINDER FOR ATTACHMENT TO A VEHICLE AXLE AND A PISTON THEREIN FOR ATTACHMENT TO A VEHICLE CHASSIS, SAID PISTON CONTAINING A SMALL ORIFICE FOR PERMITTING AIR TO FLOW FROM ONE SIDE OF THE PISTON TO THE OTHER IN SAID CYLINDER, AND A ONE-WAY CHECK VALVE FOR ADMITTING AIR IN ONE SIDE OF THE CYLINDER ONLY DURING COMPRESSION OF THE VEHICLE SPRING AND WHICH IS CLOSED AS THE RESULT OF REBOUND MOVEMENT AND TRAVEL OF THE PISTON IN AN OPPOSITE DIRECTION, THERE BEING NO OTHER OPENINGS TO THE ATMOSPHERE IN SAID CYLINDER, WHEREBY THE AIR PRESSURE THEREIN WILL PROGRESSIVELY INCREASE AS THE RESULT OF RECIPROCATION OF THE PISTON UNTIL THE COMPRESSIVE FORCES DIMINISH TO A POINT WHERE THEY NO LONGER ACTIVATE SAID CHECK VALVE.
References Cited (Backward Citations)
US2833379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |