Patent US3645654A successfully refreshed from Google Patents.
US3645654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
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Filing: 1970-05-01
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Granted: 1972-02-29
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Expires: 1990-05-01
Abstract
Abstract A hydraulic pump or motor unit of the rotary sliding vane type has a casing which supports a shaft and a replaceable cartridge. The cartridge has a wide cam ring and narrower vanes supported in a narrower rotor. Pressure-loaded cheek plates are contoured to fit within the cam ring and have sealed pockets on their outer face in which fluid pressure is applied to clamp the cheek plates against the rotor and vanes.
Inventors
- 👤 Albin J Niemiec
- 👤 Raymond B Pettibone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:17
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
A hydraulic pump or motor unit of the rotary sliding vane type comprising first and second housing members secured together to provide a cartridge receiving cavity, means in the first member journaling a drive shaft which extends into the cavity, passages formed in each member to provide high and low pressure terminal connections, a replaceable cartridge assembly mounted in the cavity surrounding the drive shaft and which comprises a slotted rotor axially slidable in keyed relation to the shaft, vanes slidable in the slots in the rotor, an ovoid cam ring of greater axial width than the rotor and vanes and at least one cheek plate of complementary ovoid form positioned within the cam ring adjacent the rotor and vanes and means forming clamping pressure pockets of predetermined configuration on the outer side of the cheek plate and in communication with the high pressure passage, whereby the cheek plate maintains the rotor and vanes under a clamping force to minimize leakage along the side faces of the rotor and vanes.
Claim 2
Dependent Claim
170 words
A hydraulic pump or motor unit of the rotary sliding vane type comprising first and second housing members secured together to provide a cartridge receiving cavity, means in the first member journaling a drive shaft which extends into the cavity, passages formed in each member to provide high and low pressure terminal connections, a replaceable cartridge assembly mounted in the cavity surrounding the drive shaft and which comprises a slotted rotor axially slidable in keyed relation to the shaft, vanes slidable in the slots in the rotor, an ovoid cam ring of greater axial width than the rotor and vanes and at least one cheek plate of complementary ovoid form positioned within the cam ring adjacent the rotor and vanes and means forming clamping pressure pockets of predetermined configuration on the outer side of the cheek plate and in communication with the high pressure passage, whereby the cheek plate maintains the rotor and vanes under a clamping force to minimize leakage along the side faces of the rotor and vanes.
Claim 3
Dependent Claim
41 words
A unit as defined in claim 1 wherein the complementary ovoid periphery of the cheek plate is interrupted at four places to provide passageways for fluid into and out of the spaces between the rotor, the vanes and the cam ring.
Claim 4
Dependent Claim
36 words
A unit as defined in claim 1 wherein the cam ring has diametrically opposed sections of reduced width providing passageways for low pressure communication with the spaces between the rotor, the vanes and the cam ring.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |