Patent US3237566A successfully refreshed from Google Patents.
US3237566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid transfer pump
Assignee: TA ACQUISITION CORP
•
Filing: 1963-10-11
•
Granted: 1966-03-01
•
Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Lester E Roenick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:42
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A FLUID TRANSFER PUMP, COMPRISING, A HOUSING HAVING A PUMP CHAMBER PROVIDED THEREIN, INTERNAL AND EXTERNAL ROTOR MEMBERS COOPERATIVELY FORMED AND DISPOSED WITHIN SAID PUMP CHAMBER FOR PROVIDING FLUID RECEPTIVE SPACES THEREBETWEEN IN THE COURSE OF RELATIVE ROTATION THEREOF, FLUID SUCTION AND PRESSURE CHAMBERS PROVIDED IN SAID PUMP HOUSING IN COMMUNICATION WITH SAID PUMP CHAMBER AND THE FLUID RECEPTIVE SPACES BETWEEN SAID ROTOR MEMBERS, A CROSS-FLOW PASSAGE PROVIDED IN SAID HOUSING AND EXTENDING BETWEEN SAID FLUID SUCTION AND PRESSURE CHAMBERS, SAID CROSS-FLOW PASSAGE BEING IN COMMUNICATION WITH THE FLUID RECEPTIVE SPACES BETWEEN SAID ROTOR MEMBERS INDEPENDENT OF THE COMMUNICATION OF SAID FLUID SUCTION AND CHECK VALVE MEANS PROVIDED IN THE CROSS-FLOW PASSAGE FOR SELECTIVELY PERMITTING THE FLOW OF PRESSURE FLUID THROUGH SAID CROSS FLOW PASSAGE TO THE SPACES BETWEEN SAID ROTOR MEMBERS FROM ONLY ONE OF SAID FLUID SUCTION AND PRESSURE CHAMBERS.
Claim 2
Dependent Claim
142 words
A FLUID TRANSFER PUMP, COMPRISING, A HOUSING HAVING A PUMP CHAMBER PROVIDED THEREIN, INTERNAL AND EXTERNAL ROTOR MEMBERS COOPERATIVELY FORMED AND DISPOSED WITHIN SAID PUMP CHAMBER FOR PROVIDING FLUID RECEPTIVE SPACES THEREBETWEEN IN THE COURSE OF RELATIVE ROTATION THEREOF, FLUID SUCTION AND PRESSURE CHAMBERS PROVIDED IN SAID PUMP HOUSING IN COMMUNICATION WITH SAID PUMP CHAMBER AND THE FLUID RECEPTIVE SPACES BETWEEN SAID ROTOR MEMBERS, A CROSS-FLOW PASSAGE PROVIDED IN SAID HOUSING AND EXTENDING BETWEEN SAID FLUID SUCTION AND PRESSURE CHAMBERS, SAID CROSS-FLOW PASSAGE BEING IN COMMUNICATION WITH THE FLUID RECEPTIVE SPACES BETWEEN SAID ROTOR MEMBERS INDEPENDENT OF THE COMMUNICATION OF SAID FLUID SUCTION AND CHECK VALVE MEANS PROVIDED IN THE CROSS-FLOW PASSAGE FOR SELECTIVELY PERMITTING THE FLOW OF PRESSURE FLUID THROUGH SAID CROSS FLOW PASSAGE TO THE SPACES BETWEEN SAID ROTOR MEMBERS FROM ONLY ONE OF SAID FLUID SUCTION AND PRESSURE CHAMBERS.
References Cited (Backward Citations)
US1799237A
Cited
US2159720A
Cited
US2619911A
Cited
US2544144A
Cited
US3080819A
Cited
US2940399A
Cited
US2998783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |