US PATENT SUBCLASS 269 / 48.4
.~.~.~.~ And coil spring

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

47  DF  HOLDER INSERTED WITHIN WORK APERTURE {5}
48.1  DF  .~ Expandable mandrel {1}
48.2  DF  .~.~ Plural pin mandrel {1}
48.3  DF  .~.~.~ Having intermediate expanding means {1}
48.4.~.~.~.~ And coil spring

DEFINITION

Classification: 269/48.4

And coil spring:

(under subclass 48.3) Device further provided with a helical body tending to return to its original shape after being distorted.

(1) Note. The coil spring usually acts to axially move and bias the intermediate expanding means.