US PATENT SUBCLASS 433 / 135
.~.~.~ Screw actuated clamp for apertured tool bit

Current as of: June, 1999
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433 /   HD   DENTISTRY

25  DF  APPARATUS {20}
103  DF  .~ Having motor or means to transmit motion from motor to tool (e.g., "engine") {10}
134  DF  .~.~ Arbor {1}
135.~.~.~ Screw actuated clamp for apertured tool bit

DEFINITION

Classification: 433/135

Screw actuated clamp for apertured tool bit:

(under subclass 134) Apparatus wherein the second portion adapted to releasably hold a tool bit includes helically ribbed means adapted to be inserted through an opening in the tool bit and rotated to secure the tool bit to the arbor.