Expansible chamber devices – Displacement control of plural cylinders arranged in... – Parallel cylinders
Patent
1992-12-21
1993-10-19
Look, Edward K.
Expansible chamber devices
Displacement control of plural cylinders arranged in...
Parallel cylinders
92 71, 92 57, 91505, 417269, 60487, 74 60, 29888, F01B 300, F01B 1304
Patent
active
052535762
ABSTRACT:
A radial piston pump includes a pair of inboard trunions which provide tilting bearing support for the swashplate. The trunion blocks may be made from sections of ordinary cold rolled steel bar stock and attached to the end wall of the pump housing with externally accessible bolted connections which allow final precise alignment of the trunion blocks in the assembled pump. The swashplate includes a concave cylindrical bearing surface which rides on the trunion blocks and, to enable precision finishing and machining of the concave bearing surface in a simple manner. Two swashplates are made from a single metal casting in which a full cylindrical through bore can be accurately cut and finished, and the casting subsequently cut in two to provide two swashplates. The swashplate is mounted with its transverse tilt axis offset from the axis of the pump drive shaft in a direction providing a net imbalance in piston spring biasing force to urge the swashplate on-stroke to enhance start-up operation.
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patent: 5095807 (1992-03-01), Wagenseil
patent: 5101555 (1992-04-01), Hauser
patent: 5184536 (1993-02-01), Arai
Look Edward K.
Nguyen Hoang
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