US3299637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid system venting and filling
Assignee: Individual
•
Filing: 1966-04-08
•
Granted: 1967-01-24
•
Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Charles U Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:07
CPC Classifications
F; F15; F15B; F15B7/00; F15B7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87748; Y10T137/87756
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A FLUID POWER TRANSMISSION SYSTEM, A CYLINDER HAVING PRESSURE FLOW CONDUIT MEANS COMMUNICATING WITH OPPOSITE END PORTIONS THEREOF, A PISTON MOVABLE AXIALLY IN SAID CYLINDER BETWEEN SAID END PORTIONS, A SERVICING CONDUIT FLOW CONNECTED TO SAID SYSTEM AND HAVING A NORMALLY CLOSED EXTERIOR COMMUNICATION INLET, A PAIR OF VALVES INDEPENDENTLY BIASED TO SEAT TOWARD EACH OTHER IN SAID SERVICING CONDUIT AT OPPOSITE SIDES OF SAID EXTERIOR COMMUNICATION INLET, SAID VALVES, WHEN OPEN, PROVIDING AN AIR VENTING AND FLUID FILLING PASSAGE BETWEEN SAID EXTERIOR COMMUNICATION INLET AND SAID SYSTEM, AND A COMMON ACTUATOR DISPOSED BETWEEN SAID VALVES AND ENGAGEABLE WITH THE VALVES TO OPEN THEM SIMULTANEOUSLY UPON MOVEMENT OF SAID ACTUATOR.
Claim 2
Dependent Claim
111 words
IN A FLUID POWER TRANSMISSION SYSTEM, A CYLINDER HAVING PRESSURE FLOW CONDUIT MEANS COMMUNICATING WITH OPPOSITE END PORTIONS THEREOF, A PISTON MOVABLE AXIALLY IN SAID CYLINDER BETWEEN SAID END PORTIONS, A SERVICING CONDUIT FLOW CONNECTED TO SAID SYSTEM AND HAVING A NORMALLY CLOSED EXTERIOR COMMUNICATION INLET, A PAIR OF VALVES INDEPENDENTLY BIASED TO SEAT TOWARD EACH OTHER IN SAID SERVICING CONDUIT AT OPPOSITE SIDES OF SAID EXTERIOR COMMUNICATION INLET, SAID VALVES, WHEN OPEN, PROVIDING AN AIR VENTING AND FLUID FILLING PASSAGE BETWEEN SAID EXTERIOR COMMUNICATION INLET AND SAID SYSTEM, AND A COMMON ACTUATOR DISPOSED BETWEEN SAID VALVES AND ENGAGEABLE WITH THE VALVES TO OPEN THEM SIMULTANEOUSLY UPON MOVEMENT OF SAID ACTUATOR.
References Cited (Backward Citations)
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Cited
US2110195A
Cited
US2238374A
Cited
US2597050A
Cited
FR1101826A
Cited
FR1192434A
Cited
US3040533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |