Power plants – Pressure fluid source and motor – Having distinct cooling or lubricating structure
Patent
1987-11-19
1990-07-10
Look, Edward K.
Power plants
Pressure fluid source and motor
Having distinct cooling or lubricating structure
60487, 60488, 184 617, F16D 3102
Patent
active
049399004
ABSTRACT:
A hydraulic motor and a hydraulic pump are interconnected by a closed hydraulic circuit. A lubricating chamber is defined around the sliding surfaces of the swash plate and the plungers of at least one of the hydraulic pump and the hydraulic motor. A shuttle valve has two input ports connected to respective oil passages, the shuttle valve being shiftable to connect the one of the oil passages which is of lower oil pressure to the output port of the shuttle valve when the differential pressure between the oil passages is relatively large. A first relief valve is opened to communicate the output port to the lubricating chamber when the oil pressure in the output port exceeds a first pressure level. A second relief valve connected between the first relief valve and the lubricating chamber is opened when the oil pressure between the first relief valve and the lubricating chamber exceeds a second pressure level lower than the first pressure level.
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Circuits de Transmissions, "Applications classiques . . . ," pp. (B 5616) 8-11, with English-language translation, (no date).
Furumoto Mitsumasa
Ikejiri Kenichi
Kawahara Eiichiro
Yamamoto Noboru
Honda Giken Kogyo Kabushiki Kaisha
Look Edward K.
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