US3652189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
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Filing: 1970-10-29
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Granted: 1972-03-28
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Expires: 1990-10-29
Abstract
Abstract A hydraulic motor of the rotary sliding vane type has two pairs of displacement chambers of different size, either one or both of which may be utilized for driving the motor by selective control of the inlet and outlet porting. The cam ring against which the vanes are projected has four dwells of the same major diameter which are connected by eight ramps with four dwells of minor diameter, one pair of the latter being more than 25 percent greater in diameter than the other. This avoids functional difficulties inherent in similar vane motors in which all of the four minor dwells are of the same diameter and the two pairs of major dwells are of different diameter.
Inventors
- 👤 John D Gowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:25
CPC Classifications
F; F03; F03C; F03C2/00; F03C2/30; F03C2/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
In a rotary vane motor having a slotted rotor carrying a plurality of radially slidable vanes and a stator including a ported housing and a cam ring against which the outer ends of the vanes are projected, the cam ring having four major dwells connected by eight ramps with four minor dwells, and the porting including a port at each ramp, that improvement in which the minor dwells include one pair which is more than 25 percent larger in diameter than the other pair.
Claim 2
Dependent Claim
84 words
In a rotary vane motor having a slotted rotor carrying a plurality of radially slidable vanes and a stator including a ported housing and a cam ring against which the outer ends of the vanes are projected, the cam ring having four major dwells connected by eight ramps with four minor dwells, and the porting including a port at each ramp, that improvement in which the minor dwells include one pair which is more than 25 percent larger in diameter than the other pair.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |