Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1980-02-05
1982-04-06
Braun, Leslie
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74773, 192 61, F16H 344, F16H 5710, F16D 3104
Patent
active
043229883
ABSTRACT:
A fluid braked planetary transmission is disclosed as including a driven sun gear and a plurality of meshing planet pinions carried in a housing and adapted to act as positive displacement pumps, all but one of the pinions also being adapted to act as positive displacement motors. The pump outlets are restricted by an automatic valve to resist rotation of the pinions whereby the housing is rotated, with controlled slippage, by rotation of the sun gear. Pressurized fluid is recirculated to the pinions acting as motors to recoup hydraulic energy which would otherwise be lost.
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