US3146725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump plunger
Assignee: Dresser Industries Inc
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Filing: 1962-01-12
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Granted: 1964-09-01
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Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jacob W Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:48
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PUMP PLUNGER, COMPRISING: (A) A CYLINDRICAL BODY HAVING (A) A REDUCED DIAMETER, EXTERNALLY THREADED LONGITUDINALLY EXTENDING PORTION AT ONE END (B) AND AND ENLARGED CYLINDRICAL PORTION AT THE OPPOSITE END (C) WITH SHOULDERS AT THE ENDS OF SAID ENLARGED PORTION, (D) SAID BODY HAVING A LONGITUDINALLY EXTENDING PASSAGE THERETHROUGH (E) WITH A VALVE SEAT AT THE END OF THE REDUCED DIAMETER PORTION ABOUT THE ADJACENT END OF SAID PASSAGE; (B) A TRAVELING VALVE SECURED TO THE REDUCED DIAMETER PORTION OF SAID BODY, (A) SAID TRAVELING VALVE HAVING A MOVABLE VALVE MEMBER ADAPTED TO SEAT ON SAID VALVE SEAT;
Claim 2
Dependent Claim
99 words
A PUMP PLUNGER, COMPRISING: (A) A CYLINDRICAL BODY HAVING (A) A REDUCED DIAMETER, EXTERNALLY THREADED LONGITUDINALLY EXTENDING PORTION AT ONE END (B) AND AND ENLARGED CYLINDRICAL PORTION AT THE OPPOSITE END (C) WITH SHOULDERS AT THE ENDS OF SAID ENLARGED PORTION, (D) SAID BODY HAVING A LONGITUDINALLY EXTENDING PASSAGE THERETHROUGH (E) WITH A VALVE SEAT AT THE END OF THE REDUCED DIAMETER PORTION ABOUT THE ADJACENT END OF SAID PASSAGE; (B) A TRAVELING VALVE SECURED TO THE REDUCED DIAMETER PORTION OF SAID BODY, (A) SAID TRAVELING VALVE HAVING A MOVABLE VALVE MEMBER ADAPTED TO SEAT ON SAID VALVE SEAT;
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |