US PATENT SUBCLASS 433 / 151
.~.~.~ By sudden release of spring

Current as of: June, 1999
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433 /   HD   DENTISTRY

25  DF  APPARATUS {20}
141  DF  .~ Hand manipulatable implement {10}
150  DF  .~.~ Impacting means {1}
151.~.~.~ By sudden release of spring

DEFINITION

Classification: 433/151

By sudden release of spring:

(under subclass 150) Apparatus including a resilient member which stores energy supplied by the hand of an operator, which energy is subsequently released to impart a blow to the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121, for motor-driven tools which deliver an impact by sudden release of a spring compressed by the motor.