Patent US3290998A successfully refreshed from Google Patents.
US3290998A
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US
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Fluid actuator
Assignee: Motors Liquidation Co
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Filing: 1964-06-08
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Granted: 1966-12-13
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Expires: 1984-06-08
Abstract
No abstract record available.
Inventors
- 👤 John A Clements
- 👤 Niles L Dice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:33
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/18; F15B11/08; F15B11/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN AN ACTUATOR (A) A PAIR OF FLUID MOTORS HAVING OPPOSED MOTOR OUTPUT MEMBERS WHICH MOVE IN OPPOSITE DIRECTIONS UPON SELECTIVE AND INDIVIDUAL MOTOR OPERATION AND RETRACT WHEN MOTOR OPERATION IS DISCONTINUED, (B) MEANS OPERABLE TO LIMIT THE MOVEMENTS OF SAID MOTOR OUTPUT MEMBERS TO A PREDETERMINED STROKE UPON MOTOR OPERATION, (C ) AN ACTUATOR OUTPUT MEMBER CAPABLE OF MOVEMENT IN THE DIRECTION OF MOVEMENT OF SID MOTOR OUTPUT MEMBERS, (D) A PAIR OF ONE-WAY DEVICES INDIVIDUALLY OPERATED BY SAID MOTOR OUTPUT MEMBERS EACH HAVING ENGAGING MEANS, BIASING MEANS FOR RETRACTING SAID MOTOR OUTPUT MEMBERS AND FOR NORMALLY HOLDING SAID ENGAGING MEANS IN A NON-ACTIVATED CONDITION OUT OF ENGAGEMENT WITH SAID ACTUATOR OUTPUT MEMBER WHEN SAID FLUID MOTORS ARE NOT BEING OPERATED TO PERMIT FREE MOVEMENT OF SAID ACTUATOR OUTPUT MEMBER, (E) AND SAID ENGAGING MEANS EACH BEING ARRANGED TO ENGAGE THEIR OPERATING MOTOR OUTPUT MEMBER SO THAT
Claim 2
Dependent Claim
148 words
IN AN ACTUATOR (A) A PAIR OF FLUID MOTORS HAVING OPPOSED MOTOR OUTPUT MEMBERS WHICH MOVE IN OPPOSITE DIRECTIONS UPON SELECTIVE AND INDIVIDUAL MOTOR OPERATION AND RETRACT WHEN MOTOR OPERATION IS DISCONTINUED, (B) MEANS OPERABLE TO LIMIT THE MOVEMENTS OF SAID MOTOR OUTPUT MEMBERS TO A PREDETERMINED STROKE UPON MOTOR OPERATION, (C ) AN ACTUATOR OUTPUT MEMBER CAPABLE OF MOVEMENT IN THE DIRECTION OF MOVEMENT OF SID MOTOR OUTPUT MEMBERS, (D) A PAIR OF ONE-WAY DEVICES INDIVIDUALLY OPERATED BY SAID MOTOR OUTPUT MEMBERS EACH HAVING ENGAGING MEANS, BIASING MEANS FOR RETRACTING SAID MOTOR OUTPUT MEMBERS AND FOR NORMALLY HOLDING SAID ENGAGING MEANS IN A NON-ACTIVATED CONDITION OUT OF ENGAGEMENT WITH SAID ACTUATOR OUTPUT MEMBER WHEN SAID FLUID MOTORS ARE NOT BEING OPERATED TO PERMIT FREE MOVEMENT OF SAID ACTUATOR OUTPUT MEMBER, (E) AND SAID ENGAGING MEANS EACH BEING ARRANGED TO ENGAGE THEIR OPERATING MOTOR OUTPUT MEMBER SO THAT
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |