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US3912421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial piston machine
Assignee: Bosch Rexroth AG
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Filing: 1974-06-18
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Granted: 1975-10-14
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Expires: 1994-06-18
Abstract
Abstract A plurality of radially oriented pistons are each surrounded by a cylinder sleeve so as to be free to slide within the same. Each of the cylinder sleeves has a radially outer end which engages and surrounds a portion of a part-spherical surface of a stationary member. Inlet and outlet valves are provided in the stationary member on the respective portions of the partspherical surface which are surrounded by the radially outer ends of the cylinder sleeves.
Inventors
- 👤 Robert Gelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:01
CPC Classifications
F; F01; F01B; F01B15/00; F01B15/04; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0415; F03C1/0435
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
In a radial piston machine, a combination comprising a housing; a shaft having an eccentric portion and being rotatably mounted in said housing; a plurality of radially oriented pistons mounted within said housing and each having an inner end; a piston shoe connected to the inner end of each piston in sliding engagement with said eccentric portion of said shaft; a plurality of cylinder sleeves, each surrounding one of said pistons for free sliding movement relative thereto, each of said cylinder sleeves having a radially outer end; a stationary member for each of said cylinder sleeves and having an inwardly directed partspherical surface, a portion of which being engaged and surrounded by the radially outer end of the respective cylinder sleeve; biasing means biasing each of said cylinder sleeves into engagement with said part-spherical surface; inlet and outlet valve means in each member at the respective portion of said part-spherical surface which is surrounded by said outer end of the respective cylinder sleeve, said inlet valve means comprising a valve member located within said cylinder sleeve and spring means connected to said valve member at the side thereof facing away from said cylinder sleeve for biasing the valve member into engagement with said stationary member.
Claim 2
Dependent Claim
205 words
In a radial piston machine, a combination comprising a housing; a shaft having an eccentric portion and being rotatably mounted in said housing; a plurality of radially oriented pistons mounted within said housing and each having an inner end; a piston shoe connected to the inner end of each piston in sliding engagement with said eccentric portion of said shaft; a plurality of cylinder sleeves, each surrounding one of said pistons for free sliding movement relative thereto, each of said cylinder sleeves having a radially outer end; a stationary member for each of said cylinder sleeves and having an inwardly directed partspherical surface, a portion of which being engaged and surrounded by the radially outer end of the respective cylinder sleeve; biasing means biasing each of said cylinder sleeves into engagement with said part-spherical surface; inlet and outlet valve means in each member at the respective portion of said part-spherical surface which is surrounded by said outer end of the respective cylinder sleeve, said inlet valve means comprising a valve member located within said cylinder sleeve and spring means connected to said valve member at the side thereof facing away from said cylinder sleeve for biasing the valve member into engagement with said stationary member.
Claim 3
Dependent Claim
26 words
A cOmbination as defined in claim 1, further comprising connecting means connecting each piston shoe with its associated piston and defining between them a weakened zone.
Claim 4
Dependent Claim
22 words
A combination as defined in claim 2, wherein said connecting means comprises a threaded bolt for each piston shoe and associated piston.
Claim 5
Dependent Claim
46 words
A combination as defined in claim 1, wherein said housing has two sections surrounding said member and having a pair of oppositely located recesses; said member having a pair of oppositely located outwardly extending projections each of which is matingly received in one of said recesses.
Claim 6
Dependent Claim
43 words
A combination as defined in claim 4, wherein said member is formed with a fluid channel which communicates with said outer ends of the respective cylinder sleeves; and wherein one of said projections is formed with an outlet which communicates with said channel.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |