BRAKE SYSTEM AND FLUID PRESSURE MOTOR INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Oct 1, 2020
app pub date -
Jun 3, 2019
filing date -
Sep 10, 2018
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Abstract
A brake system configured to brake a hydraulic motor includes a valve device configured to open and close supply passages through which working oil pressurized in a hydraulic pump is supplied to a brake device, the valve device has a first connection port to which the working oil is led from the hydraulic pump, a second connection port from which the working oil is led to the brake device, and a valve element provided with a pressure receiving surface facing the first connection port, and the valve element permits communication between the first connection port and the second connection port when pressure of the working oil led to the first connection port reaches predetermined pressure, and shuts off the communication between the first connection port and the second connection port when the pressure of the working oil led to the first connection port becomes less than the predetermined pressure.
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