Patent US3141382A successfully refreshed from Google Patents.
US3141382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking pneumatic actuators
Assignee: GE Healthcare UK Ltd
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Filing: 1963-01-24
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Granted: 1964-07-21
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Expires: 1983-01-24
Abstract
No abstract record available.
Inventors
- 👤 Oldfield Thomas Alfred
- 👤 Carr Roderick Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:28
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/20; F15B11/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A SELF-LOCKING FLUID-PRESSURE-OPERATED ACTUATOR, HAVING A RAM CYLINDER AND A PISTON MOVABLE IN SAID CYLINDER BETWEEN A FIRST AND A SECOND RELATIVE POSITION, A BAULK ELEMENT OPERATIVELY CONNECTED TO SAID RAM TO BE MOVED FROM A FIRST TO A SECOND POSITION AS SAID PISTON MOVES FROM SAID FIRST TO SAID SECOND RELATIVE POSITION AND VICE VERSA, A LATCH MEMBER MOVABLE, WHEN SAID BAULK ELEMENT IS IN ITS FIRST POSITION, BETWEEN A LOCKING POSITION IN WHICH IT PREVENTS THE BAULK MEMBER FROM MOVING TOWARDS ITS SECOND POSITION, AND A FREE POSITION IN WHICH IT PERMITS SUCH MOVEMENT OF THE BAULK MEMBER, A LOCKING RAM OPERATIVELY CONNECTED TO THE LATCH MEMBER AND HAVING A LOCKING RAM CYLINDER AND A PISTON MOVABLE THEREIN, A SELECTOR VALVE FOR CONNECTION TO A FLUID-PRESSURE SUPPLY, SAID VALVE BEING MOVABLE BETWEEN A FIRST POSITION IN WHICH IT ESTABLISHES CONNECTION BETWEEN SUCH SUPPLY AND A FIRST SERVICE LINE SUPPLYING FLUID PRESSURE TO THE LOCKING RAM FOR MOVING THE LATCH MEMBER TO ITS FREE POSITION, SAID FIRST SERVICE LINE HAVING A BRANCH LEADING TO ONE END OF THE MAIN RAM CYLINDER FOR PERMITTING THE ADMISSION OF FLUID PRESSURE TO MOVE THE MAIN RAM PISTON TO ITS SAID FIRST POSITION, AND A SECOND POSITION IN
Claim 2
Dependent Claim
205 words
A SELF-LOCKING FLUID-PRESSURE-OPERATED ACTUATOR, HAVING A RAM CYLINDER AND A PISTON MOVABLE IN SAID CYLINDER BETWEEN A FIRST AND A SECOND RELATIVE POSITION, A BAULK ELEMENT OPERATIVELY CONNECTED TO SAID RAM TO BE MOVED FROM A FIRST TO A SECOND POSITION AS SAID PISTON MOVES FROM SAID FIRST TO SAID SECOND RELATIVE POSITION AND VICE VERSA, A LATCH MEMBER MOVABLE, WHEN SAID BAULK ELEMENT IS IN ITS FIRST POSITION, BETWEEN A LOCKING POSITION IN WHICH IT PREVENTS THE BAULK MEMBER FROM MOVING TOWARDS ITS SECOND POSITION, AND A FREE POSITION IN WHICH IT PERMITS SUCH MOVEMENT OF THE BAULK MEMBER, A LOCKING RAM OPERATIVELY CONNECTED TO THE LATCH MEMBER AND HAVING A LOCKING RAM CYLINDER AND A PISTON MOVABLE THEREIN, A SELECTOR VALVE FOR CONNECTION TO A FLUID-PRESSURE SUPPLY, SAID VALVE BEING MOVABLE BETWEEN A FIRST POSITION IN WHICH IT ESTABLISHES CONNECTION BETWEEN SUCH SUPPLY AND A FIRST SERVICE LINE SUPPLYING FLUID PRESSURE TO THE LOCKING RAM FOR MOVING THE LATCH MEMBER TO ITS FREE POSITION, SAID FIRST SERVICE LINE HAVING A BRANCH LEADING TO ONE END OF THE MAIN RAM CYLINDER FOR PERMITTING THE ADMISSION OF FLUID PRESSURE TO MOVE THE MAIN RAM PISTON TO ITS SAID FIRST POSITION, AND A SECOND POSITION IN
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |