Hydrostatic transmission with spool valve driven motor
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United States of America Patent
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-
Mar 13, 2018
Issued Date -
N/A
app pub date -
Apr 14, 2015
filing date -
May 7, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A center section/motor sub-assembly for use in a hydrostatic transmission includes a center section having a pump running face for interfacing with a pump and a motor running face for interfacing with a motor, and a bore extending laterally through the center section from the motor running face. A spool valve is received in the bore and includes a fluid pathway for providing fluid communication between the pump running face and the motor running face. The sub-assembly further includes a motor having a rotor and a motor stator secured to the center section adjacent to the motor running face in a manner that permits rotation of the rotor. The center section is configured for the hydraulic separating forces of the motor to be reacted only into the center section. A hydrostatic transmission includes the sub-assembly enclosed by a housing, in combination with a pump and output shaft.
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