US3623322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid power transmission system
Assignee: NAT RES DEV
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Filing: 1970-02-10
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Granted: 1971-11-30
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Expires: 1990-02-10
Abstract
Abstract A FLUID POWER TRANSMISSION SYSTEM COMPRISING A ROTARY BALL PUMP HAVING TWO ROWS OF BALLS, AND MEANS TO RENDER INOPERATIVE ONE OF THE ROWS OF BALLS SO AS TO ALTER THE PUMP OUTPUT, IN COMBINATION WITH A PLURALITY OF MOTORS DRIVABLE BY THE PUMPED FLUID, AND MEANS TO COUPLE THE MOTORS SELECTIVELY TO THE PUMP OUTPUT.
Inventors
- 👤 Roger Harvey Yorke Hancock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:43
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/452
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |