US3146720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief means for pump
Assignee: Dresser Industries Inc
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Filing: 1961-12-06
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Granted: 1964-09-01
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Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:10
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/2574; Y10T137/2579; Y10T137/2587; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN A PUMP INCLUDING A BODY HAVING A BY-PASS CONNECTING AN INLET AND AN OUTLET, THE COMBINATION THEREWITH OF PRESSURE RELIEF MEANS COMPRISING A SEAT IN SAID BY-PASS MOVABLE VALVE MEANS OPERATIVELY ASSOCIATED WITH SAID SEAT AND INCLUDING A SLEEVE AND A WALL ARRANGED TRANSVERSELY OF AND WITHIN SAID SLEEVE, YIELDING MEANS URGING SAID SLEEVE TOWARD SAID SEAT, SAID SLEEVE WHEN SEATED BLOCKING SAID BY-PASS BUT WHEN UNSEATED UNBLOCKING SAID BY-PASS, AND A FIXED PISTON ARRANGED WITHIN SAID SLEEVE BETWEEN SAID WALL AND SEAT TO PROVIDE A CHAMBER, SAID PISTON HAVING AN OPENING THERETHROUGH COMMUNICATING WITH SAID CHAMBER.
References Cited (Backward Citations)
US168807A
Cited
US677470A
Cited
US1285819A
Cited
US2013260A
Cited
US2305518A
Cited
US2437791A
Cited
US2456651A
Cited
US2684631A
Cited
USRE24892E
Cited
US2996013A
Cited
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 |