US PATENT SUBCLASS 226 / 146
.~.~ And retrograde movement preventer

Current as of: June, 1999
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226 /   HD   ADVANCING MATERIAL OF INDETERMINATE LENGTH

120  DF  BY INTERMITTENT (INTERRUPTED) MATERIAL-MOVER {13}
144  DF  .~ With overtravel preventer {2}
146.~.~ And retrograde movement preventer

DEFINITION

Classification: 226/146

(under subclass 144) Device provided with means to preclude reverse motion of the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for other retrograde movement preventer.