US4793240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable device for axial piston pump/motor of a tilting axis type
Assignee: Komatsu Ltd
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Filing: 1986-06-24
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Granted: 1988-12-27
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Expires: 2006-06-24
Abstract
Abstract The heretofore known adjusting device for an axial piston pump/motor of a tilting axis type in which a tilt angle of a valve plate is varied by rocking the valve plate along arcuate guide grooves formed in an end cover of the axial piston pump/motor is improved so as to reduce the size of the adjusting device in the direction of its stroke by assembling a sleeve or sleeves and a piston fitting in the sleeve or sleeves in a telescopic structure within a cylinder formed in the end cover along a rocking direction of the valve plate, and by providing a trunnion pin engaged with the valve plate in the piston.
Inventors
- 👤 Yoshikazu Nagahara
- 👤 Michio Onzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/32; F04B1/328
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
An adjusting device for an axial piston/motor of a tilting axis type in which a tilt angle of a valve plate is varied by rocking said valve plate along arcuate guide grooves formed in an end cover of said axial piston pump/motor, comprising: sleeve means and a piston slidably received in said sleeve means in a telescopic assembly within a cylinder formed in said end cover and extending in the rocking direction of said valve plate, said sleeve means being slidably movable internally of said cylinder with a portion of the length of said piston nested internally of said sleeve means when said sleeve means is moved to each end of said cylinder, and a trunnion pin mounted to said piston and engaged with said valve plate.
Claim 2
Dependent Claim
127 words
An adjusting device for an axial piston/motor of a tilting axis type in which a tilt angle of a valve plate is varied by rocking said valve plate along arcuate guide grooves formed in an end cover of said axial piston pump/motor, comprising: sleeve means and a piston slidably received in said sleeve means in a telescopic assembly within a cylinder formed in said end cover and extending in the rocking direction of said valve plate, said sleeve means being slidably movable internally of said cylinder with a portion of the length of said piston nested internally of said sleeve means when said sleeve means is moved to each end of said cylinder, and a trunnion pin mounted to said piston and engaged with said valve plate.
Claim 3
Dependent Claim
27 words
An adjusting device as claimed in claim 1 wherein said sleeve means comprises a pair of separate sleeves positioned at both end portions of said piston, respectively.
Claim 4
Dependent Claim
22 words
An adjusting device as claimed in claim 1 wherein said sleeve means comprises an integral single sleeve positioned substantially over said piston.
References Cited (Backward Citations)
US2905150A
Cited
GB928977A
Cited
US3429225A
Cited
US3943828A
Cited
GB1546090A
Cited
JPS5973609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |