US3127967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking direct nut operator
Assignee: Henry Pratt Co LLC
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Filing: 1961-09-22
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Granted: 1964-04-07
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Expires: 1981-09-22
Abstract
No abstract record available.
Inventors
- 👤 Donald G Fawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:24
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/528; F16K31/5282; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A SELF-LOCKING DIRECT NUT OPERATOR FOR A VALVE STEM, COMPRISING: A VALVE HOUSING; A VALVE STEM; A VALVE STEM SLEEVE MOUNTED ON SAID VALVE STEM FOR TURNING MOVEMENT WITH THE STEM AND LIMITED MOVEMENT LONGITUDINALLY OF THE STEM; A PLURALITY OF LOCKING TEETH ON SAID VALVE HOUSING; A PLURALITY OF LOCKING TEETH AT ONE END OF SAID VALVE STEM SLEEVE IN MATING LOCKING ENGAGEMENT WITH SAID VALVE HOUSING LOCKING TEETH, SAID VALVE SLEEVE TEETH BEING STATIONARY RELATIVE TO SAID SLEEVE; A NUT CONNECTED TO THE VALVE STEM AND SAID SLEEVE WITH A LOST MOTION CONNECTION PERMITTING SAID NUT TO TURN RELATIVE TO SAID STEM AND SLEEVE; CAMMING MEANS BETWEEN THE VALVE STEM SLEEVE AND THE NUT TO MOVE SAID SLEEVE LONGITUDINALLY OF SAID STEM TO
References Cited (Backward Citations)
US652244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |