US3601012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure devices
Assignee: Individual
•
Filing: 1969-05-21
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Granted: 1971-08-24
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Expires: 1989-05-21
Abstract
Abstract The present invention is concerned with fluid pressure pumps or motors of the type having a rotatable cylinder and a plurality of reciprocal pistons which abut a thrust plate inclined to the axis of rotation of the barrel. In order, among other things, to enhance such abutment a fluid pressure device of the invention is so constructed that the barrel is connected to a port plate by a plurality of sleeves in each of which sleeves is reciprocally mounted a said piston. Sealing means are provided between each sleeve and the port plate and in a preferred embodiment the port plate is associated with a stationary valve plate.
Inventors
- 👤 Harold George Oram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0032; F01B3/0044; F01B3/0064; F01B3/0041; F01B3/0052
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
354 words
A fluid pressure device of the axial-in-line type comprising a cylindrical housing; a first closure member disposed at one end of said housing, a second closure member disposed at the opposite end of said housing; a driven shaft extending axially through said housing rotatably supporteD in said first and said second closure members; a driven member supported on said shaft within said cylindrical housing for rotation with said shaft; a port plate securely attached to said second closure member in sealing engagement therewith; a radially inclined cam plate attached to said first closure member surrounding said shaft; said second closure member having an inlet port and an outlet port; a plurality of communicating ports provided in said port plate communicating with said inlet and said outlet respectively; said driven member having a flange portion provided with a plurality of apertures therethrough in parallel alignment with said shaft; a plurality of sleeve members disposed within said apertures for extension therefrom towards said port plate, each of said sleeve members having a reduced diameter end portion; said port plate being provided with counterbores substantially corresponding in size to said reduced diameter end portions of said sleeves and in axially aligned communication with said ports in said port plate, each of said sleeves being adapted to receive in reciprocable relationship a piston member, the outer end of said piston member being universally attached in radially spaced relationship to a thrust plate surrounding said shaft secured to the driven member; said thrust plate being maintained in frictional engagement against said radially inclined cam plate within said housing so that upon rotation of said shaft within said housing said thrust plate will be forced to rotate along said inclined cam plate to thereby successively reciprocate the plurality of piston members into and out of a respective sleeve associated with said piston member, and resilient expansion means disposed between said driven member and said port plate around said shaft to constantly urge said port plate into engagement against said second closure member for sealing engagement therewith and to urge said driven member into driving engagement against said inclined cam plate.
Claim 2
Dependent Claim
354 words
A fluid pressure device of the axial-in-line type comprising a cylindrical housing; a first closure member disposed at one end of said housing, a second closure member disposed at the opposite end of said housing; a driven shaft extending axially through said housing rotatably supporteD in said first and said second closure members; a driven member supported on said shaft within said cylindrical housing for rotation with said shaft; a port plate securely attached to said second closure member in sealing engagement therewith; a radially inclined cam plate attached to said first closure member surrounding said shaft; said second closure member having an inlet port and an outlet port; a plurality of communicating ports provided in said port plate communicating with said inlet and said outlet respectively; said driven member having a flange portion provided with a plurality of apertures therethrough in parallel alignment with said shaft; a plurality of sleeve members disposed within said apertures for extension therefrom towards said port plate, each of said sleeve members having a reduced diameter end portion; said port plate being provided with counterbores substantially corresponding in size to said reduced diameter end portions of said sleeves and in axially aligned communication with said ports in said port plate, each of said sleeves being adapted to receive in reciprocable relationship a piston member, the outer end of said piston member being universally attached in radially spaced relationship to a thrust plate surrounding said shaft secured to the driven member; said thrust plate being maintained in frictional engagement against said radially inclined cam plate within said housing so that upon rotation of said shaft within said housing said thrust plate will be forced to rotate along said inclined cam plate to thereby successively reciprocate the plurality of piston members into and out of a respective sleeve associated with said piston member, and resilient expansion means disposed between said driven member and said port plate around said shaft to constantly urge said port plate into engagement against said second closure member for sealing engagement therewith and to urge said driven member into driving engagement against said inclined cam plate.
Claim 3
Dependent Claim
387 words
A fluid pressure device of the axial-in-line type comprising a cylindrical housing; a first closure member disposed at one end of said housing, a second closure member disposed at the opposite end of said housing; a driven shaft extending axially through said housing rotatably supported in said first and said second closure members; a driven member supported on said shaft within said cylindrical housing for rotation with said shaft; a port plate securely attached to said second closure member in sealing engagement therewith; a radially inclined cam plate attached to said first closure member surrounding said shaft; said second closure member having an inlet port and an outlet port; a plurality of communicating ports provided in said port plate communicating with said inlet and said outlet respectively; said driven member having a flange portion provided with a plurality of apertures therethrough in parallel alignment with said shaft; a plurality of sleeve members disposed within said apertures for extension therefrom towards said port plate, each of said sleeve members having a reduced diameter end portion; said port plate being provided with counterbores substantially corresponding in size to said reduced diameter end portions of said sleeves and in axially aligned communication with said ports in said port plate, each of said sleeves being adapted to receive in reciprocable relationship a piston member, the outer end of said piston member being universally attached in radially spaced relationship to a thrust plate surrounding said shaft secured to the driven member; said thrust plate being maintained in frictional engagement against said radially inclined cam plate within said housing so that upon rotation of said shaft within said housing said thrust plate will be forced to rotate along said inclined cam plate to thereby successively reciprocate the plurality of piston members into and out of a respective sleeve associated with said piston member; resilient expansion means disposed between said drIven member and said port plate around said shaft to constantly urge said port plate into engagement against said second closure member for sealing engagement therewith and said driven member into driving engagement against said inclined cam plate; and said port plate and said driven member being coaxially attached to said driven shaft for conjoint rotation therewith by means of splines to thereby maintain said sleeves in parallel aligned relationship with said driven shaft.
Claim 4
Dependent Claim
387 words
A fluid pressure device of the axial-in-line type comprising a cylindrical housing; a first closure member disposed at one end of said housing, a second closure member disposed at the opposite end of said housing; a driven shaft extending axially through said housing rotatably supported in said first and said second closure members; a driven member supported on said shaft within said cylindrical housing for rotation with said shaft; a port plate securely attached to said second closure member in sealing engagement therewith; a radially inclined cam plate attached to said first closure member surrounding said shaft; said second closure member having an inlet port and an outlet port; a plurality of communicating ports provided in said port plate communicating with said inlet and said outlet respectively; said driven member having a flange portion provided with a plurality of apertures therethrough in parallel alignment with said shaft; a plurality of sleeve members disposed within said apertures for extension therefrom towards said port plate, each of said sleeve members having a reduced diameter end portion; said port plate being provided with counterbores substantially corresponding in size to said reduced diameter end portions of said sleeves and in axially aligned communication with said ports in said port plate, each of said sleeves being adapted to receive in reciprocable relationship a piston member, the outer end of said piston member being universally attached in radially spaced relationship to a thrust plate surrounding said shaft secured to the driven member; said thrust plate being maintained in frictional engagement against said radially inclined cam plate within said housing so that upon rotation of said shaft within said housing said thrust plate will be forced to rotate along said inclined cam plate to thereby successively reciprocate the plurality of piston members into and out of a respective sleeve associated with said piston member; resilient expansion means disposed between said drIven member and said port plate around said shaft to constantly urge said port plate into engagement against said second closure member for sealing engagement therewith and said driven member into driving engagement against said inclined cam plate; and said port plate and said driven member being coaxially attached to said driven shaft for conjoint rotation therewith by means of splines to thereby maintain said sleeves in parallel aligned relationship with said driven shaft.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |