US PATENT SUBCLASS 104 / 246
.~.~ Rail interlock

Current as of: June, 1999
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104 /   HD   RAILWAYS

242  DF  DERAILMENT GUARDS {5}
245  DF  .~ Guide rollers {2}
246.~.~ Rail interlock

DEFINITION

Classification: 104/246

(under subclass 245) Derailment guards in which the guide-rollers have interlocking engagement with the rails to prevent upward movement of the rollers from the rails.