Hydraulic control and operation system for a railroad car retarder
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United States of America Patent
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Nov 28, 2006
Issued Date -
N/A
app pub date -
Jul 1, 2004
filing date -
Jul 1, 2003
priority date (Note) -
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Abstract
A hydraulic control and operating system is provided for a railroad car retarder to control the movement of railroad cars in railroad classification yard. The system utilizes a double-acting hydraulic cylinder to operate the retarder mechanism and includes a hydraulic control circuit that provides protection against pressure spikes and high pressure excursions, high and low temperature excursions, low oil levels and oil filter fouling. The above system not only shuts itself down to prevent damage, but provides a warning to maintenance staff that service should be performed long before a need for system shut-down is required. The system includes a central operating panel in the rail yard control center, remote control panel located at the position of the retarder and the system can be connected for operation from a completely remote location.
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