US PATENT SUBCLASS 269 / 242
.~.~.~ Right and left threaded

Current as of: June, 1999
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269 /   HD   WORK HOLDERS

86  DF  RELATIVELY MOVABLE JAWS {25}
216  DF  .~ Means to actuate jaw(s) (i.e., apply holding force) {10}
240  DF  .~.~ Screw-nut type {6}
242.~.~.~ Right and left threaded

DEFINITION

Classification: 269/242

(under subclass 240) Device wherein threaded portions of one of said elements form two opposed helices so that rotation of said element causes relative movement in opposite directions between coacting threaded elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

218+, for patents for a holder including a common means to actuate plural jaws, and see the notes thereunder.