Patent US4624945A successfully refreshed from Google Patents.
Patent US3086475A successfully refreshed from Google Patents.
US3086475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
rosa en
Assignee: —
•
Filing: —
•
Granted: 1963-04-23
•
Expires: 1980-04-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:47
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863; F01C21/0827; F01C21/0836; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
VANES FOR USE IN A FLUID PUMP OF THE VANE TYPE WHEREIN A ROTOR CARRYING RADIALLY SLIDABLE VANES IN SLOTS IN ITS PERIPHERY IS SURROUNDED BY A CAM RING CONTACTING THE OUTER EDGES OF SAID VANES AND DETERMINING THE RADIAL POSITION THEREOF, SAID VANES COMPRISING RECTANGULAR PLATES HAVING THEIR RING CONTACTING OUTER EDGES BEVELLED AND HAVING THE LATERAL EDGES OF THEIR FACES BEVELLED TO THEREBY FORM CONTINUOUSLY OPEN PASSAGEWAYS LEADING FROM THE PUMPING CHAMBER TO THE INNER END OF THE VANE SLOTS BOTH AHEAD OF AND BEHIND THE VANES TO CONTROL THE PRESSURE ACTING ON THE INNER END OF SAID VANES.
Claim 2
Dependent Claim
101 words
VANES FOR USE IN A FLUID PUMP OF THE VANE TYPE WHEREIN A ROTOR CARRYING RADIALLY SLIDABLE VANES IN SLOTS IN ITS PERIPHERY IS SURROUNDED BY A CAM RING CONTACTING THE OUTER EDGES OF SAID VANES AND DETERMINING THE RADIAL POSITION THEREOF, SAID VANES COMPRISING RECTANGULAR PLATES HAVING THEIR RING CONTACTING OUTER EDGES BEVELLED AND HAVING THE LATERAL EDGES OF THEIR FACES BEVELLED TO THEREBY FORM CONTINUOUSLY OPEN PASSAGEWAYS LEADING FROM THE PUMPING CHAMBER TO THE INNER END OF THE VANE SLOTS BOTH AHEAD OF AND BEHIND THE VANES TO CONTROL THE PRESSURE ACTING ON THE INNER END OF SAID VANES.
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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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |