Patent US2277100A successfully refreshed from Google Patents.
Patent US3072149A successfully refreshed from Google Patents.
US3072149A
Expired / Lapsed
US
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Detent for valve plungers
Assignee: Doosan Bobcat North America Inc
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Filing: 1960-11-15
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Granted: 1963-01-08
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Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Woodrow A Hasbany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:02
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0704; G; G05; G05G; G05G5/00; G05G5/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A SPOOL VALVE HAVING A HOUSING CONTAINING A CYLINDRICAL BORE WITH A LONGITUDINALLY MOVABLE CYLINDRICAL PLUNGER THEREIN: A DETENT MECHANISM FOR RELEASABLY RETAINING SAID PLUNGER IN PRESELECTED LONGITUDINAL POSITIONS, COMPRISING A CYLINDRICAL SECTION OF SUBSTANTIALLY THE SAME DIAMETER AS SAID BORE FORMED INTEGRALLY WITH ONE END OF SAID PLUNGER AND HAVING A DEEP ANNULAR GROOVE THEREIN, AND AN ANNULAR-SHAPED COIL SPRING IN SAID GROOVE PROJECTING OUTWARDLY THEREFROM THROUGHOUT ITS CIRCUMFERENCE AND BEING COMPRESSIBLE FULLY INTO SAID GROOVE, THE WALL OF SAID HOUSING DEFINING THE BORE ALONG SAID SECTION HAVING A PLURALITY OF ANNULAR GROOVES SPACED LONGITUDINALLY ALONG SAID WALL FOR RECEIVING SAID SPRING WHEN SAID PLUNGER IS MOVED LONGITUDINALLY TO THE POSITION AT WHICH SAID FIRST MENTIONED GROOVE REGISTERS THEREWITH, THE ANNULAR GROOVES IN THE WALL OF SAID HOUSING BEING OF THE SAME WIDTH AS THE GROOVE IN SAID PLUNGER.
Claim 2
Dependent Claim
141 words
IN A SPOOL VALVE HAVING A HOUSING CONTAINING A CYLINDRICAL BORE WITH A LONGITUDINALLY MOVABLE CYLINDRICAL PLUNGER THEREIN: A DETENT MECHANISM FOR RELEASABLY RETAINING SAID PLUNGER IN PRESELECTED LONGITUDINAL POSITIONS, COMPRISING A CYLINDRICAL SECTION OF SUBSTANTIALLY THE SAME DIAMETER AS SAID BORE FORMED INTEGRALLY WITH ONE END OF SAID PLUNGER AND HAVING A DEEP ANNULAR GROOVE THEREIN, AND AN ANNULAR-SHAPED COIL SPRING IN SAID GROOVE PROJECTING OUTWARDLY THEREFROM THROUGHOUT ITS CIRCUMFERENCE AND BEING COMPRESSIBLE FULLY INTO SAID GROOVE, THE WALL OF SAID HOUSING DEFINING THE BORE ALONG SAID SECTION HAVING A PLURALITY OF ANNULAR GROOVES SPACED LONGITUDINALLY ALONG SAID WALL FOR RECEIVING SAID SPRING WHEN SAID PLUNGER IS MOVED LONGITUDINALLY TO THE POSITION AT WHICH SAID FIRST MENTIONED GROOVE REGISTERS THEREWITH, THE ANNULAR GROOVES IN THE WALL OF SAID HOUSING BEING OF THE SAME WIDTH AS THE GROOVE IN SAID PLUNGER.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |