US PATENT SUBCLASS 451 / 485
.~.~.~ By coil spring

Current as of: June, 1999
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451 /   HD   ABRADING

463  DF  CARRIER FOR RELATIVELY MOVABLE SIMULTANEOUSLY USABLE TOOLS {2}
464  DF  .~ For radially movable tools {7}
484  DF  .~.~ Including resiliently urged tool {1}
485.~.~.~ By coil spring

DEFINITION

Classification: 451/485

By coil spring:

(under subclass 484) Carrier wherein the springlike means is a resilient member in the form of a helix wound about a centerline which, through force directed along such centerline, produces the tendency toward radial movement.