US PATENT SUBCLASS 269 / 30
.~.~ With common fluid means for holding and releasing

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

20  DF  WITH FLUID MEANS {7}
27  DF  .~ Cylinder-piston means in series with additional positioning means {4}
30.~.~ With common fluid means for holding and releasing {1}
31  DF  .~.~.~> Cylinder-piston unit rotatably and/or pivotally mounted

DEFINITION

Classification: 269/30

(under subclass 27) Device wherein a single pneumatic or hydraulic source is used (usually through valve means) to hold and release a jaw* carrier; or such means is used to move (A) a jaw, (B) a jaw carrier, (C) mechanical means associated with a jaw or carrier, or (D) any combination of (A), (B), and/or (C), both toward and away from a workpiece.

(1) Note. This subclass requires the single fluid unit to move at least one element in each of two opposite (180 deg.) directions. If a spring (or similar means) is used to move the element in one of the two directions, see (2) Note under subclass 20 and see subclasses 32+.

(2) Note. See (4) Note and the search notes under subclass 20.