Hydraulic circuit having a hydraulic motor equipped with a brake for a vehicle suitable for being towed
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United States of America Patent
Stats
-
Jan 13, 2004
Grant Date -
Nov 28, 2002
app pub date -
Apr 23, 2002
filing date -
Apr 23, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic circuit for the hydrostatic transmission of a vehicle, said hydraulic circuit comprising at least one hydraulic motor, two main ducts, a parking brake having brake means, brake release control means suitable for feeding the brake release chamber from a first brake release fluid source, and means for connecting said chamber to a unpressurized reservoir. The circuit has a single short-circuit and selection valve having two main ports connected to respective ones of the two main ducts, and two selection ports connected respectively to the brake release chamber and to the brake release duct, and control means for controlling said valve, which control means are suitable for causing the valve to take up a first configuration in which the main ports are mutually isolated while the selection ports are interconnected, and for causing it to take up a second configuration in which the main ports are interconnected while the selection ports are mutually isolated.
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