US3563678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumps
Assignee: Individual
•
Filing: 1969-03-24
•
Granted: 1971-02-16
•
Expires: 1989-03-24
Abstract
Abstract A ROTARY PISTON PUMP, WHEREIN A CIRCULAR PISTON MOVES ORBITALLY WITHIN A CYLINDRICAL PUMPING CHAMBER WITHIN A STATOR WITH INLET AND OUTLET PORTS BEING PROVIDED, ONE TO EACH SIDE OF A PIVOTING VANE COOPERATING WITH BOTH THE STATOR AND THE PISTOR TO FORM A PURTITION IN THE PUMPING CHAMBER, CHARACTERIZED IN THAT THE ROTARY PISTON IS CARRIED BY A ROTARY END DISC ROTATED BY A MAIN SPINDLE AND DEFINING AN END WALL OR PART OF AN END WALL OF THE PUMPING CHAMBER.
Inventors
- 👤 Peter Sadler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:41
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/32; F04C18/332; F04C23/00; F04C23/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |