US3183931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging valve for oleo pneumatic aircraft landing struts
Assignee: De Havilland Aircraft of Canada Ltd
•
Filing: 1963-02-25
•
Granted: 1965-05-18
•
Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Alford Bryan Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:09
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/58; B64C25/60; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CHARGING VALVE INCORPORATING A SPRING LOADED PRESSURE RELIEF VALVE FOR USE WITH AIRCRAFT OLEO PNEUMATIC LANDING STRUTS AND THE LIKE AND COMPRISING: A CHARGING VALVE BODY PORTION; OUTLET CONNECTION MEANS FOR ATTACHMENT OF SAID BODY PORTION TO SAID STRUTS; A PASSAGEWAY DEFINED BY SAID BODY PORTION; VALVE MEANS IN SAID BODY PORTION OPERABLE TO OCCLUDE SAID PASSAGEWAY; A CHARGING VALVE INLET CONNECTING MEMBER OF T-SHAPED CONSTRUCTION; AIR PRESSURE SUPPLY CONNECTING MEANS ON ONE ARM OF SAID T; A PASSAGEWAY DEFINED BY THE LEG OF SAID T IN COMMUNICATION WITH SAID PASSAGEWAY IN SAID BODY PORTION; PASSAGEWAYS DEFINED BY THE ARMS OF SAID T AXIALLY ALIGNED WITH ONE ANOTHER, ONE OF SAID PASSAGEWAYS PROVIDING A HOUSING FOR SAID PRESSURE RELIEF VALVE AND THE OTHER SAID PASSAGEWAY COMMUNICATING WITH SAID AIR PRESSURE SUPPLY CONNECTING MEANS, SAID VALVE MEANS INCLUDING A CORE
Claim 2
Dependent Claim
140 words
A CHARGING VALVE INCORPORATING A SPRING LOADED PRESSURE RELIEF VALVE FOR USE WITH AIRCRAFT OLEO PNEUMATIC LANDING STRUTS AND THE LIKE AND COMPRISING: A CHARGING VALVE BODY PORTION; OUTLET CONNECTION MEANS FOR ATTACHMENT OF SAID BODY PORTION TO SAID STRUTS; A PASSAGEWAY DEFINED BY SAID BODY PORTION; VALVE MEANS IN SAID BODY PORTION OPERABLE TO OCCLUDE SAID PASSAGEWAY; A CHARGING VALVE INLET CONNECTING MEMBER OF T-SHAPED CONSTRUCTION; AIR PRESSURE SUPPLY CONNECTING MEANS ON ONE ARM OF SAID T; A PASSAGEWAY DEFINED BY THE LEG OF SAID T IN COMMUNICATION WITH SAID PASSAGEWAY IN SAID BODY PORTION; PASSAGEWAYS DEFINED BY THE ARMS OF SAID T AXIALLY ALIGNED WITH ONE ANOTHER, ONE OF SAID PASSAGEWAYS PROVIDING A HOUSING FOR SAID PRESSURE RELIEF VALVE AND THE OTHER SAID PASSAGEWAY COMMUNICATING WITH SAID AIR PRESSURE SUPPLY CONNECTING MEANS, SAID VALVE MEANS INCLUDING A CORE
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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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |