Patent US2300984A successfully refreshed from Google Patents.
US3133615A
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Hydraulic shock absorber with improved piston valve means
Assignee: Bendix Corp
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Filing: 1962-07-02
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Granted: 1964-05-19
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Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 James L Edman
- 👤 Joseph A Porath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/512; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7771
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A SHOCK ABSORBER HAVING A CYLINDER SEPARATED INTO VARIABLE VOLUME CHAMBERS BY A PISTON, AN AUTOMATIC MEANS TO CONTROL THE AMOUNT OF FLUID DISPLACED FROM ONE OF THE CHAMBERS TO ANOTHER OF THE CHAMBERS, SAID AUTOMATIC MEANS COMPRISING: MEANS DEFINING A TUBULAR EXTENSION FIXEDLY SECURED TO THE PISTON, A VALVE PORT FORMED IN SAID EXTENSION THROUGH WHICH FLUID IS FORCED FROM ONE CHAMBER TO THE OTHER BY THE SLIDING ACTION OF THE PISTON WHICH RESULTS IN REDUCING THE VOLUME OF ONE CHAMBER AND INCREASING THE VOLUME OF THE OTHER CHAMBER,
Claim 2
Dependent Claim
91 words
IN A SHOCK ABSORBER HAVING A CYLINDER SEPARATED INTO VARIABLE VOLUME CHAMBERS BY A PISTON, AN AUTOMATIC MEANS TO CONTROL THE AMOUNT OF FLUID DISPLACED FROM ONE OF THE CHAMBERS TO ANOTHER OF THE CHAMBERS, SAID AUTOMATIC MEANS COMPRISING: MEANS DEFINING A TUBULAR EXTENSION FIXEDLY SECURED TO THE PISTON, A VALVE PORT FORMED IN SAID EXTENSION THROUGH WHICH FLUID IS FORCED FROM ONE CHAMBER TO THE OTHER BY THE SLIDING ACTION OF THE PISTON WHICH RESULTS IN REDUCING THE VOLUME OF ONE CHAMBER AND INCREASING THE VOLUME OF THE OTHER CHAMBER,
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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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |