Patent US538017A successfully refreshed from Google Patents.
Patent US3138071A successfully refreshed from Google Patents.
US3138071A
Expired / Lapsed
US
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Booster assisted actuating systems
Assignee: Girling Ltd
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Filing: 1962-11-28
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Granted: 1964-06-23
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Expires: 1982-11-28
Abstract
No abstract record available.
Inventors
- 👤 Sadler Francis Antony Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:50
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A FLUID-DIFFERENTIAL-OPERATED BOOSTER COMPRISING A CYLINDER, A MOVABLE WALL WITHIN SAID CYLINDER, A PISTON ROD ATTACHED TO SAID MOVABLE WALL AND EXTENDING THROUGH AN END WALL OF SAID CYLINDER, FIRST VALVE MEANS CONTROLLING COMMUNICATION BETWEEN THOSE PORTIONS OF SAID CYLINDER WHICH LIE ON OPPOSITE SIDES OF SAID MOVABLE WALL, A PORT ADAPTED TO COMMUNICATE WITH A SOURCE OF PRESSURE DIFFERENTIAL, SECOND VALVE MEANS CONTROLLING COMMUNICATION BETWEEN SAID PORT AND THAT PORTION OF SAID CYLINDER LYING ON ONE SIDE OF SAID MOVABLE WALL, SAID FIRST AND SECOND VALVE MEANS BEING MOUNTED ON SAID MOVABLE WALL, A VALVE-OPERATING ROD, SAID VALVE OPERATING ROD HAVING AN OPERATIVE CONNECTION WITH SAID FIRST AND SECOND VALVE MEANS AND BEING MOVABLE WITH RESPECT TO SAID MOVABLE WALL ALONG A LINE PARALLEL TO THE AXIS OF MOVEMENT OF SAID PISTON ROD TO OPERATE SAID FIRST AND SECOND VALVE MEANS, AND SAID FIRST AND SECOND VALVE MEANS BEING DISPOSED IN A MANNER WHEREBY MOVEMENT OF SAID VALVEACTUATING ROD IN ONE DIRECTION ALONG SAID LINE RESULTS IN
Claim 2
Dependent Claim
168 words
A FLUID-DIFFERENTIAL-OPERATED BOOSTER COMPRISING A CYLINDER, A MOVABLE WALL WITHIN SAID CYLINDER, A PISTON ROD ATTACHED TO SAID MOVABLE WALL AND EXTENDING THROUGH AN END WALL OF SAID CYLINDER, FIRST VALVE MEANS CONTROLLING COMMUNICATION BETWEEN THOSE PORTIONS OF SAID CYLINDER WHICH LIE ON OPPOSITE SIDES OF SAID MOVABLE WALL, A PORT ADAPTED TO COMMUNICATE WITH A SOURCE OF PRESSURE DIFFERENTIAL, SECOND VALVE MEANS CONTROLLING COMMUNICATION BETWEEN SAID PORT AND THAT PORTION OF SAID CYLINDER LYING ON ONE SIDE OF SAID MOVABLE WALL, SAID FIRST AND SECOND VALVE MEANS BEING MOUNTED ON SAID MOVABLE WALL, A VALVE-OPERATING ROD, SAID VALVE OPERATING ROD HAVING AN OPERATIVE CONNECTION WITH SAID FIRST AND SECOND VALVE MEANS AND BEING MOVABLE WITH RESPECT TO SAID MOVABLE WALL ALONG A LINE PARALLEL TO THE AXIS OF MOVEMENT OF SAID PISTON ROD TO OPERATE SAID FIRST AND SECOND VALVE MEANS, AND SAID FIRST AND SECOND VALVE MEANS BEING DISPOSED IN A MANNER WHEREBY MOVEMENT OF SAID VALVEACTUATING ROD IN ONE DIRECTION ALONG SAID LINE RESULTS IN
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |