Measuring and testing – Testing of shock absorbing device – Railway draft gear
Patent
1993-04-13
1994-07-05
Chilcot, Jr., Richard E.
Measuring and testing
Testing of shock absorbing device
Railway draft gear
73 1109, G01M 1700
Patent
active
053257006
ABSTRACT:
A railcar cushion device is tested by applying a force necessary to move the cushion device in a controlled motion at a predetermined velocity or velocities according to a motion profile. The cushion device's performance is analyzed by measuring the force applied at various positions during the motion profile and comparing the force to a standard for cushion devices in good condition at the positions. Alternatively, a damping coefficient or other performance parameter for the cushion device is calculated from the force applied and position of the cushion device and compared to a standard to analyze cushion device performance. A tester for performing cushion device testing comprises a hydraulic ram and an electronic motion controller for applying the force to the cushion device. The motion controller uses motion feedback from a position transducer to provide the controlled motion to the cushion device.
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Norfolk Southern proposal to Emerald Hydraulics, dated Oct. 16, 1991.
Emerald Hydraulics response to Norfolk Southern, dated. Feb. 22, 1992.
Biegel Ronald L.
Chilcot Jr. Richard E.
Emerald Hydraulics, Inc.
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