US PATENT SUBCLASS 81 / 339
.~.~ Coacting friction means

Current as of: June, 1999
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81 /   HD   TOOLS

300  DF  TOOL JAW(S) POSITIONED BY RELATIVELY MOVABLE PLURAL HANDLES (E.G., PLIERS) {15}
329  DF  .~ With means (nontoggle) to hold jaws against only retrograde movement {4}
339.~.~ Coacting friction means {1}
340  DF  .~.~.~> Serrated surfaces

DEFINITION

Classification: 81/339

(under subclass 329) Tools including two portions slidable relatively to each other in surface-to-surface contact, the surfaces approaching each other as the jaws are actuated by handle manipulation, and engaging firmly to resist retracting movement as the jaws engage the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

323, for other frictional latch means urged into latching position by a spring.