US3270621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic actuator and locking mechanism
Assignee: Reynolds Metals Co
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Filing: 1964-04-30
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Granted: 1966-09-06
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Ridder Ernst J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:00
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261; B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/28; F15B11/00; F15B11/16; F15B11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN COMBINATION, A FIRST PISTON AND CYLINDER ARRANGEMENT, SAID FIRST PISTON BEING MOVABLE TO ONE POSITION THEREOF, A SECOND PISTON AND CYLINDER ARRANGEMENT, SAID SECOND PISTON BEING MOVABLE TO ONE POSITION THEREOF, SAID FIRST PISTON WHEN MOVED TO A SAID ONE POSITION THEREOF LOCKING SAID SECOND PISTON FROM MOVEMENT WHEN SAID SECOND PISTON IS IN SAID ONE POSITION THEREOF, AND FLUID PRESSURE MEANS FOR MOVING SAID PISTONS, SAID FLUID PRESSURE MEANS FIRST MOVING SAID SECOND PISTON ONE POSITION THEREOF BEFORE IT IS ADAPTED TO MOVE SAID FIRST PISTON TO SAID ONE POSITION THEREOF.
Claim 2
Dependent Claim
93 words
IN COMBINATION, A FIRST PISTON AND CYLINDER ARRANGEMENT, SAID FIRST PISTON BEING MOVABLE TO ONE POSITION THEREOF, A SECOND PISTON AND CYLINDER ARRANGEMENT, SAID SECOND PISTON BEING MOVABLE TO ONE POSITION THEREOF, SAID FIRST PISTON WHEN MOVED TO A SAID ONE POSITION THEREOF LOCKING SAID SECOND PISTON FROM MOVEMENT WHEN SAID SECOND PISTON IS IN SAID ONE POSITION THEREOF, AND FLUID PRESSURE MEANS FOR MOVING SAID PISTONS, SAID FLUID PRESSURE MEANS FIRST MOVING SAID SECOND PISTON ONE POSITION THEREOF BEFORE IT IS ADAPTED TO MOVE SAID FIRST PISTON TO SAID ONE POSITION THEREOF.
References Cited (Backward Citations)
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Cited
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US1189251A
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US2139185A
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |