US PATENT SUBCLASS 269 / 21
.~ Vacuum-type holding means

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

20  DF  WITH FLUID MEANS {7}
21.~ Vacuum-type holding means

DEFINITION

Classification: 269/21

(under subclass 20) Device wherein the fluid pressure means operates to produce a difference in the pressures upon at least two sides of a workpiece, or a portion of a complete holder, which difference is effective to hold the work or the holder.