US3091931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system
Assignee: Individual
•
Filing: 1959-12-31
•
Granted: 1963-06-04
•
Expires: 1979-12-31
Abstract
No abstract record available.
Inventors
- 👤 Edward A Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:01
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T13/141; B60T13/148; B62; B62D; B62D5/00; B62D5/06; B62D5/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A HYDRAULIC CONTROL SYSTEM INCLUDING A RESERVOIR, THE COMBINATION COMPRISING, A HYDRAULIC CIRCUIT HAVING A LOW PRESSURE RETURN FOR RETURNING FLUID TO THE RESERVOIR, A NORMALLY CLOSED BLEEDER AT TIMES HAVING A CONNECTION TO THE FLUID IN SAID LOW PRESSURE RETURN, AND MEANS CONNECTED IN SAID HYDRAULIC CIRCUIT APART FROM SAID RESERVOIR FOR MAINTANING A RESIDUAL FLUID PRESSURE IN THE CONNECTION TO SAID BLEDER, SAID RESIDUAL PRESSURE BEING EFFECTIVE TO FORCE AIR AND FLUID IN SAID BLEEDER CONNECTION THROUGH
Claim 2
Dependent Claim
80 words
IN A HYDRAULIC CONTROL SYSTEM INCLUDING A RESERVOIR, THE COMBINATION COMPRISING, A HYDRAULIC CIRCUIT HAVING A LOW PRESSURE RETURN FOR RETURNING FLUID TO THE RESERVOIR, A NORMALLY CLOSED BLEEDER AT TIMES HAVING A CONNECTION TO THE FLUID IN SAID LOW PRESSURE RETURN, AND MEANS CONNECTED IN SAID HYDRAULIC CIRCUIT APART FROM SAID RESERVOIR FOR MAINTANING A RESIDUAL FLUID PRESSURE IN THE CONNECTION TO SAID BLEDER, SAID RESIDUAL PRESSURE BEING EFFECTIVE TO FORCE AIR AND FLUID IN SAID BLEEDER CONNECTION THROUGH
References Cited (Backward Citations)
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Cited
US2179201A
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US2419977A
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US2597404A
Cited
US2688335A
Cited
US2645314A
Cited
US2896733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |