Patent US3254606A successfully refreshed from Google Patents.
US3254606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant delivery pump
Assignee: Individual
•
Filing: 1963-12-16
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Granted: 1966-06-07
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:37
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A VANE TYPE FLUID PUMP COMPRISING (A) A HOUSING HAVING A PUMPING CHAMBEAR, AND AN INLET AND OUTLET OPEN TO SPACED PORTIONS OF SAID CHAMBER, (B) A ROTOR IN SAID CHAMBER AND CARRYING VANES OPERABLE TO PUMP FLUID FROM SAID INLET TO SAID OUTLET, (C) EACH OF SAID VANES HAVING A BEVELED OUTER PORTION AND A STEPPED INNER PORTION TO DEFINE OUTER LEADING AND TRAILING ENDS AND INNER LEADING AND TRAILING ENDS, AND (D) MEANS DIRECTING PRESSURE FROM SAID OUTLET TO SAID TRAILING END WHEN SAID OUTER TRAILING END IS SUBJECTED TO OUTLET PRESSURE, FROM SAID OUTLET TO SAID LEADING INNER END WHEN SAID LEADING OUTER END IS SUBJECTED TO OUTLET PRESSURE, FORM SAID INLET TO SAID INNER TRAILING END WHEN SAID OUTER TRAILING END IS SUBJECTED TO INLET PRESSURE, AND FROM SAID INLET TO SAID INNER LEADING END WHEN SAID OUTER LEADING END IS SUBJECTED TO INLET PRESSURE.
Claim 2
Dependent Claim
149 words
A VANE TYPE FLUID PUMP COMPRISING (A) A HOUSING HAVING A PUMPING CHAMBEAR, AND AN INLET AND OUTLET OPEN TO SPACED PORTIONS OF SAID CHAMBER, (B) A ROTOR IN SAID CHAMBER AND CARRYING VANES OPERABLE TO PUMP FLUID FROM SAID INLET TO SAID OUTLET, (C) EACH OF SAID VANES HAVING A BEVELED OUTER PORTION AND A STEPPED INNER PORTION TO DEFINE OUTER LEADING AND TRAILING ENDS AND INNER LEADING AND TRAILING ENDS, AND (D) MEANS DIRECTING PRESSURE FROM SAID OUTLET TO SAID TRAILING END WHEN SAID OUTER TRAILING END IS SUBJECTED TO OUTLET PRESSURE, FROM SAID OUTLET TO SAID LEADING INNER END WHEN SAID LEADING OUTER END IS SUBJECTED TO OUTLET PRESSURE, FORM SAID INLET TO SAID INNER TRAILING END WHEN SAID OUTER TRAILING END IS SUBJECTED TO INLET PRESSURE, AND FROM SAID INLET TO SAID INNER LEADING END WHEN SAID OUTER LEADING END IS SUBJECTED TO INLET PRESSURE.
References Cited (Backward Citations)
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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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |