Title:
HYDROSTATIC STEPLESS SPEED CHANGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/104448
Kind Code:
A1
Abstract:
A hydrostatic stepless speed change device (1) constructed in combination of an axial piston hydraulic pump (30) and a hydraulic motor (40). A pump-side plunger block (31) and a motor-side plunger block (41) are opposed to each other with surfaces sliding and rotating against each other (rotary slide surfaces (33, 44)) in between. Communication passages hydraulically communicating between cylinders (31a, 41a) that are formed in both plunger blocks are formed. A separation element is provided in the communication passages. In each of the pump-side and motor-side plunger blocks, the communication passages are partitioned by the element into passages in a suction area and passages in discharge area.
Inventors:
NOZAKI TAKEAKI (JP)
Application Number:
PCT/JP2004/005833
Publication Date:
December 02, 2004
Filing Date:
April 30, 2004
Export Citation:
Assignee:
YANMAR CO LTD (JP)
NOZAKI TAKEAKI (JP)
NOZAKI TAKEAKI (JP)
International Classes:
F16H39/14; F16H47/04; (IPC1-7): F16H39/14; F16H47/04
Foreign References:
| JPS327159B1 | ||||
| US2784554A | 1957-03-12 | |||
| JPH0112307A | ||||
| JP2002168320A | 2002-06-14 | |||
| JP2003014111A | 2003-01-15 | |||
| JPS61153053A | 1986-07-11 | |||
| DE1038862B | 1958-09-11 | |||
| JPH03244857A | 1991-10-31 |
Attorney, Agent or Firm:
Yano, Juichiro (Twin 21 MID Tower 34th Floor 1-61, Shiromi
2-chome, Chuo-k, Osaka-shi Osaka, JP)
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