US3207378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pump assembly
Assignee: Pyles Industries Inc
•
Filing: 1961-08-23
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Granted: 1965-09-21
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Expires: 1981-08-23
Abstract
No abstract record available.
Inventors
- 👤 Donald E Trumbull
- 👤 Jr Arthur D Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:31
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/021; B; B05; B05B; B05B12/00; B05B12/14; B05B12/1418; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/32; G01F11/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
IN A POSITIVE DISPLACEMENT TYPE PUMP HAVING A CYLINDER ADAPTED TO BE POSITIONED VERTICALLY WITH A PISTON RECIPROCABLE WITHIN T HE CYLINDER, SAID CYLINDER HAVING A FLUID INLET AT THE LOWER END TO BE SUBMERGED IN THE FLUID TO BE PUMPED, MEANS AT THE LOWER END OF THE CYLINDER FORMING A FLUID-HOLDING CUP WHOSE RIM IS DISPOSED VERTICALLY ABOVE THE UPPER EDGE OF SAID FLUID INLET PROVIDING, WHEN SAID CUP IS FULL OF FLUID, A HYDROSTATIC FLUID SEAL AGAINST AIR ENTRY THROUGH THE INLET WHEN THE INLET IS RAISED FROM THE FLUID TO BE PUMPED.
References Cited (Backward Citations)
US620701A
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US679504A
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US1051171A
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US1072718A
Cited
US1160510A
Cited
US1964028A
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US2905361A
Cited
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |