US PATENT SUBCLASS 81 / 29
.~ Having ratchet mechanism

Current as of: June, 1999
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81 /   HD   TOOLS

28  DF  BIT STOCK HAVING MANUAL DRIVE MEANS (E.G.,BRACE) {3}
29.~ Having ratchet mechanism {4}
30  DF  .~.~> Straight crank arm
31  DF  .~.~> Adjustable pawl
32  DF  .~.~> Pivoted pawl
33  DF  .~.~> Sliding pawl

DEFINITION

Classification: 81/29

Having ratchet mechanism:

(under subclass 28) Device including a toothed wheel intermediate the bit and the driving element, and a pawl adapted to engage and drive the wheel.

(1) Note. The mechanism commonly permits the member to be driven in only one direction although the driving element can rotate in both directions.