US PATENT SUBCLASS 213 / 153
.~.~.~.~.~ Vertical disengagement prevention

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

75 R  DF  COUPLINGS {9}
77  DF  .~ Counterpart {2}
100 R  DF  .~.~ Interengaging hooks and knuckles {6}
104  DF  .~.~.~ Horizontally swinging {4}
109  DF  .~.~.~.~ Janney type {17}
153.~.~.~.~.~ Vertical disengagement prevention

DEFINITION

Classification: 213/153

Wherein devices of the class indicated means are employed to prevent disengagement of the coupler due to excessive vertical movement.