Hydraulic motor system
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United States of America Patent
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Oct 8, 1996
Grant Date -
N/A
app pub date -
Nov 17, 1994
filing date -
Nov 17, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A hydraulic motor system minimizes wasted power by using a plurality of fixed displacement hydraulic motors to drive a drive shaft in a cooperative manner. The motors are selectively switched into operation in response to variations in fluid pressure. As a consequence the hydraulic fluid acts upon a motor system having an effective combined displacement for producing a predetermined shaft rotation rate at the volumetric flow rate which caused the pressure condition. The invention is disclosed as having particular utility for driving a cooling fan for an automotive engine.
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