US PATENT SUBCLASS 269 / 250
.~.~.~.~ Means to keep faces parallel and/or translate jaw

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}
246  DF  .~.~.~ Screw travels with jaw {4}
250.~.~.~.~ Means to keep faces parallel and/or translate jaw {2}
251  DF  .~.~.~.~.~> Flange and/or slot
252  DF  .~.~.~.~.~> Traveling means parallel to screw {1}

DEFINITION

Classification: 269/250

(under subclass 246) Device including means associated and movable with the jaw to (A) keep the work engaging surface(s) of said jaw from shifting or varying angularly with respect to a coacting work engaging surface and/or (B) prevent rotation of said jaw as the screw rotates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

139, for patents to a holder with means to change the relative angular position of coacting jaw faces.