Continuously variable hydrostatic transmission
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United States of America Patent
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Oct 21, 1997
Grant Date -
N/A
app pub date -
Apr 7, 1995
filing date -
Apr 7, 1995
priority date (Note) -
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Abstract
A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connection to receive output torque resulting from the exchange of pressurized hydraulic fluid between the pump and motor units through ports in the swashplate. A hydraulically actuated ratio controller is pivotally linked to the swashplate to selectively adjust the swashplate angle relative to the output shaft axis and thereby change transmission ratio.
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