US3076470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum breaking check and shut-off valve
Assignee: Individual
•
Filing: 1959-12-01
•
Granted: 1963-02-05
•
Expires: 1979-12-01
Abstract
No abstract record available.
Inventors
- 👤 Jesse D Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:43
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/108; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A DEVICE OF THE CHARACTER DESCRIBED, COMPRISING A VALVE CASING HAVING INLET AND OUTLET PASSAGES, A LIQUID FLOW PASSAGE COMMUNICATING BETWEEN THE INLET AND OUTLET PASSAGES, A MAIN VALVE SEAT INTERRUPTING SAID LIQUID FLOW PASSAGE AND FACING TOWARD THE OUTLET PASSAGE, A MAIN VALVE MEMBER RESTING ON SAID MAIN VALVE SEAT, AN AIR INLET PORT COMMUNICATING WITH THE INLET PASSAGE AND ALIGNED WITH SAID LIQUID FLOW PASSAGE AND SAID MAIN VALVE MEMBER, A SECOND VALVE MEMBER RESTING ON A VALVE SEAT PROVIDED ON THE INSIDE OF SAID AIR INLET PORT, A SHOULDERED VALVE STEM ADJUSTABLY DISPOSED THRU THAT SIDE OF SAID CASING THAT IS OPPOSITE TO SAID AIR INLET PORT, THE SHOULDER OF THE STEM RESTING ON THE OUTLET SIDE OF SAID MAIN VALVE MEMBER, A PORTION OF SAID STEM DEPENDING FROM SAID SHOULDER AND SLIDABLY EXTENDED THRU SAID MAIN VALVE MEMBER AND INTO A RECESS PROVIDED ON THE INSIDE OF THE SECOND VALVE, THE TERMINAL END OF SAID STEM RESTING AGAINST THE BOTTOM OF SAID RECESS, THEREBY HOLDING BOTH VALVES IN CLOSED POSITION, THE FOREGOING COMBINATION OF ELEMENTS PROVIDING MEANS WHEREBY THE RISE OF BOTH VALVE MEMBERS IS SIMULTANEOUSLY LIMITED AND BOTH VALVES ARE CLOSED BY ADJUSTMENT OF SAID STEM.
Claim 2
Independent Claim
201 words
A DEVICE OF THE CHARACTER DESCRIBED, COMPRISING A VALVE CASING HAVING INLET AND OUTLET PASSAGES, A LIQUID FLOW PASSAGE COMMUNICATING BETWEEN THE INLET AND OUTLET PASSAGES, A MAIN VALVE SEAT INTERRUPTING SAID LIQUID FLOW PASSAGE AND FACING TOWARD THE OUTLET PASSAGE, A MAIN VALVE MEMBER RESTING ON SAID MAIN VALVE SEAT, AN AIR INLET PORT COMMUNICATING WITH THE INLET PASSAGE AND ALIGNED WITH SAID LIQUID FLOW PASSAGE AND SAID MAIN VALVE MEMBER, A SECOND VALVE MEMBER RESTING ON A VALVE SEAT PROVIDED ON THE INSIDE OF SAID AIR INLET PORT, A SHOULDERED VALVE STEM ADJUSTABLY DISPOSED THRU THAT SIDE OF SAID CASING THAT IS OPPOSITE TO SAID AIR INLET PORT, THE SHOULDER OF THE STEM RESTING ON THE OUTLET SIDE OF SAID MAIN VALVE MEMBER, A PORTION OF SAID STEM DEPENDING FROM SAID SHOULDER AND SLIDABLY EXTENDED THRU SAID MAIN VALVE MEMBER AND INTO A RECESS PROVIDED ON THE INSIDE OF THE SECOND VALVE, THE TERMINAL END OF SAID STEM RESTING AGAINST THE BOTTOM OF SAID RECESS, THEREBY HOLDING BOTH VALVES IN CLOSED POSITION, THE FOREGOING COMBINATION OF ELEMENTS PROVIDING MEANS WHEREBY THE RISE OF BOTH VALVE MEMBERS IS SIMULTANEOUSLY LIMITED AND BOTH VALVES ARE CLOSED BY ADJUSTMENT OF SAID STEM.
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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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |