US PATENT SUBCLASS 451 / 521
.~ Including threaded means to retain tool holder

Current as of: June, 1999
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451 /   HD   ABRADING

490  DF  TOOL SUPPORT FOR FLEXIBLE-MEMBER TOOL {13}
521.~ Including threaded means to retain tool holder {1}
522  DF  .~.~> Including bar or plate tool holding member

DEFINITION

Classification: 451/521

Including threaded means to retain tool holder:

(under subclass 490) Tool support including a tool securing means which is held relative to the support by helical screw means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

501, for threaded means securing a tool to a rotary support having slots.