US3237728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary hydraulic shock absorber
Assignee: Houdaille Industries Inc
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Filing: 1964-07-23
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Granted: 1966-03-01
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Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:00
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A ROTARY HYDRAULIC SHOCK ABSORBER COMPRISING A TUBULAR BODY DEFINING A CYLINDRICAL WORKING CHAMBER HAVING AT LEAST ONE ABUTMENT THEREIN AND A WING SHAFT RELATIVELY ROTATABLY DISPOSED COAXIALLY THROUGH SAID CHAMBER AND HAVING AT LEAST ONE VANE COOPERATING WITH THE WALL DEFINING SAID CHAMBER AND SAID ABUTMENT TO SUBDIVIDE THE CHAMBER INTO WORKING COMPARTMENTS, DISPLACEMENT PASSAGE MEANS CONNECTING THE COMPARTMENTS AND HAVING FLOW RESTRICTING VALVE MEANS THEREIN, RESPECTIVE END FLANGES SUPPORTED ON SAID BODY AND CLOSING THE OPPOSITE ENDS OF SAID CHAMBER, RESPECTIVE COVER MEMBERS COOPERATING WITH SAID END FLANGES TO REFINE RESPECTIVE RESERVOIR CHAMBERS, MEANS FIXEDLY SECURING SAID END FLANGES AND SAID COVER MEMBERS IN PLACE ON SAID BODY, AT LEAST ONE END PORTION OF THE WING SHAFT PROJECTING AS AN ATTACHMENT STEM IN JOURNALLED RELATION THROUGH ONE OF SAID END FLANGES AND ITS COOPERATING COVER MEMBER, MEANS AFFORDING A SHAFT SEAL BETWEEN SAID WING SHAFT PORTION AND THE COVER MEMBER THROUGH WHICH IT PROJECTS, PASSAGE MEANS COMPLETELY BYPASSING SAID CHAMBER AND FREELY CONNECTING SAID RESERVOIRS, AND CHECK VALVED REPLENISHING COMMUNICATION PASSAGE MEANS BETWEEN AT LEAST ONE OF SAID RESERVOIRS AND SAID CHAMBER.
Claim 2
Dependent Claim
184 words
A ROTARY HYDRAULIC SHOCK ABSORBER COMPRISING A TUBULAR BODY DEFINING A CYLINDRICAL WORKING CHAMBER HAVING AT LEAST ONE ABUTMENT THEREIN AND A WING SHAFT RELATIVELY ROTATABLY DISPOSED COAXIALLY THROUGH SAID CHAMBER AND HAVING AT LEAST ONE VANE COOPERATING WITH THE WALL DEFINING SAID CHAMBER AND SAID ABUTMENT TO SUBDIVIDE THE CHAMBER INTO WORKING COMPARTMENTS, DISPLACEMENT PASSAGE MEANS CONNECTING THE COMPARTMENTS AND HAVING FLOW RESTRICTING VALVE MEANS THEREIN, RESPECTIVE END FLANGES SUPPORTED ON SAID BODY AND CLOSING THE OPPOSITE ENDS OF SAID CHAMBER, RESPECTIVE COVER MEMBERS COOPERATING WITH SAID END FLANGES TO REFINE RESPECTIVE RESERVOIR CHAMBERS, MEANS FIXEDLY SECURING SAID END FLANGES AND SAID COVER MEMBERS IN PLACE ON SAID BODY, AT LEAST ONE END PORTION OF THE WING SHAFT PROJECTING AS AN ATTACHMENT STEM IN JOURNALLED RELATION THROUGH ONE OF SAID END FLANGES AND ITS COOPERATING COVER MEMBER, MEANS AFFORDING A SHAFT SEAL BETWEEN SAID WING SHAFT PORTION AND THE COVER MEMBER THROUGH WHICH IT PROJECTS, PASSAGE MEANS COMPLETELY BYPASSING SAID CHAMBER AND FREELY CONNECTING SAID RESERVOIRS, AND CHECK VALVED REPLENISHING COMMUNICATION PASSAGE MEANS BETWEEN AT LEAST ONE OF SAID RESERVOIRS AND SAID 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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |