US PATENT SUBCLASS 213 / 26
.~.~ Differential spring compression

Current as of: June, 1999
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213 /   HD   RAILWAY DRAFT APPLIANCES

7  DF  CUSHIONED {9}
22  DF  .~ Combined spring and friction {8}
26.~.~ Differential spring compression {1}
27  DF  .~.~.~> Rotating friction elements

DEFINITION

Classification: 213/26

(under subclass 22) Combined spring and friction devices in which compression of the springs is greater or less than the movement of the draft device.