US3955477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic piston machine having a guide for laterally guiding a cylinder block pintle
Assignee: Sulzer AG
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Filing: 1974-11-14
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Granted: 1976-05-11
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Expires: 1994-11-14
Abstract
Abstract The pintle is mounted at one end in a lever which is pivotal about an axis parallel to the pintle axis and guide member axis. In addition, a guide means is provided to laterally guide the lever and pintle within the casing during pivoting of the lever. The guide means includes various guide elements between the pintle and casing, lever and casing and the lever pivot and casing.
Inventors
- 👤 Peter Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:29
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/10; F04B1/107; F04B1/1071; F04B1/1072; F01; F01B; F01B1/00; F01B1/06; F01B1/0675; F01B1/0686; F01B1/0689; F01B13/00; F01B13/04; F01B13/06; F01B13/061; F01B13/062; F04B1/06; F04B1/07; F04B49/00; F04B49/12; F04B49/123; F04B49/128
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
190 words
A hydrostatic piston machine comprising a casing; a cylinder block pintle mounted in said casing about a longitudinal axis; a cylinder block rotatably mounted on said pintle; a guide member rotatably mounted within said casing peripherally about said cylinder block on an axis parallel to said pintle axis; a plurality of pistons movably mounted in said cylinder block radially of said pintle, each said piston having a foot at an outer end with a plane bearing surface bearing on a plane guide surface of said guide member; a lever pivotally mounted in said casing about a third axis parallel to said pintle axis, said lever being secured to said pintle for moving said pintle to relocate said pintle axis relative to said guide member axis; and a guide means including a pair of disc-shaped guide elements for laterally guiding said lever and said pintle within said casing during pivoting of said lever about said third axis, each said guide element being disposed at an opposite end of said pintle with one guide element between said pintle and rotatable guide member and the other guide element between said lever and casing.
Claim 2
Dependent Claim
190 words
A hydrostatic piston machine comprising a casing; a cylinder block pintle mounted in said casing about a longitudinal axis; a cylinder block rotatably mounted on said pintle; a guide member rotatably mounted within said casing peripherally about said cylinder block on an axis parallel to said pintle axis; a plurality of pistons movably mounted in said cylinder block radially of said pintle, each said piston having a foot at an outer end with a plane bearing surface bearing on a plane guide surface of said guide member; a lever pivotally mounted in said casing about a third axis parallel to said pintle axis, said lever being secured to said pintle for moving said pintle to relocate said pintle axis relative to said guide member axis; and a guide means including a pair of disc-shaped guide elements for laterally guiding said lever and said pintle within said casing during pivoting of said lever about said third axis, each said guide element being disposed at an opposite end of said pintle with one guide element between said pintle and rotatable guide member and the other guide element between said lever and casing.
Claim 3
Dependent Claim
33 words
A hydrostatic piston machine as set forth in claim 1 further comprising a pivot secured to said guide member and rotatably mounted in said casing, and a stub shaft secured to said pivot.
Claim 4
Dependent Claim
27 words
A hydrostatic piston machine as set forth in claim 1 further comprising a hydraulic piston means in said casing for adjusting said lever about said third axis.
Claim 5
Dependent Claim
51 words
A hydrostatic piston machine as set forth in claim 1 which further comprises a pivot on said third axis pivoting said lever thereon and wherein said guide means further includes a second pair of guide elements, said guide elements each being disposed between one end of said pivot and said casing.
Claim 6
Dependent Claim
47 words
A hydrostatic piston machine as set forth in claim 1 wherein said disc-shaped guide element between said lever and casing is a guide ring and is disposed about an aperture in said casing, said pintle having an end remote from said cylinder block accessible to said aperture.
Claim 7
Dependent Claim
32 words
A hydrostatic piston machine as set forth in claim 5 which further comprises connections in said pintle end adjacent said aperture for supplying and discharging hydraulic medium to and from said pintle.
Claim 8
Dependent Claim
33 words
A hydrostatic piston machine as set forth in claim 5 which further comprises an annular seal between said guide ring and said lever for sealing said aperture to the exterior of said casing.
Claim 9
Dependent Claim
143 words
In a hydrostatic piston machine, the combination of a cylinder block pintle having a longitudinal axis, a guide member rotatably mounted peripherally about said cylinder block on an axis parallel to said pintle axis, a lever pivotally mounted about a third axis parallel to said pintle axis, said lever being secured at one end to an end of said pintle for moving said pintle axis relative to said guide member axis and a guide means for laterally guiding said lever and said pintle in perpendicular relation to said guide member axis during pivoting of said lever about said third axis, said guide means including a pair of guide elements, each said guide element being disposed at an opposite end of said pintle with one guide element between said pintle and rotatable guide member and the other guide element between said lever and casing.
Claim 10
Dependent Claim
143 words
In a hydrostatic piston machine, the combination of a cylinder block pintle having a longitudinal axis, a guide member rotatably mounted peripherally about said cylinder block on an axis parallel to said pintle axis, a lever pivotally mounted about a third axis parallel to said pintle axis, said lever being secured at one end to an end of said pintle for moving said pintle axis relative to said guide member axis and a guide means for laterally guiding said lever and said pintle in perpendicular relation to said guide member axis during pivoting of said lever about said third axis, said guide means including a pair of guide elements, each said guide element being disposed at an opposite end of said pintle with one guide element between said pintle and rotatable guide member and the other guide element between said lever and casing.
Claim 11
Dependent Claim
162 words
A hydrostatic piston machine comprising: a casing; a cylinder block pintle mounted in said casing about a longitudinal axis; a cylinder block rotatably mounted on said pintle; a guide member rotatably mounted within said casing peripherally about said cylinder block on an axis parallel to said pintle axis; a plurality of pistons movably mounted in said cylinder block radially of said pintle, each said piston having an outer end bearing on said guide member; a lever pivotally mounted in said casing about a third axis parallel to said pintle axis, said lever being secured to said pintle for moving said pintle, relative to said guide member axis; and a pair of guide elements for laterally guiding said lever and said pintle within said casing during pivoting of said lever about said third axis, one of said elements being disposed between said pintle and said rotatable guide member and the other of said guide elements being disposed between said lever and said casing.
Claim 12
Dependent Claim
162 words
A hydrostatic piston machine comprising: a casing; a cylinder block pintle mounted in said casing about a longitudinal axis; a cylinder block rotatably mounted on said pintle; a guide member rotatably mounted within said casing peripherally about said cylinder block on an axis parallel to said pintle axis; a plurality of pistons movably mounted in said cylinder block radially of said pintle, each said piston having an outer end bearing on said guide member; a lever pivotally mounted in said casing about a third axis parallel to said pintle axis, said lever being secured to said pintle for moving said pintle, relative to said guide member axis; and a pair of guide elements for laterally guiding said lever and said pintle within said casing during pivoting of said lever about said third axis, one of said elements being disposed between said pintle and said rotatable guide member and the other of said guide elements being disposed between said lever and said casing.
References Cited (Backward Citations)
GB652092A
Cited
US2674195A
Cited
US2827859A
Cited
US3211105A
Cited
US3520232A
Cited
US3708250A
Cited
US3709104A
Cited
US3785250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |