US PATENT SUBCLASS 433 / 121
.~.~.~.~ Impact by sudden release of spring

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}
114  DF  .~.~ Hand-held tool or handpiece {9}
118  DF  .~.~.~ Having reciprocating, vibrating, or oscillating output {5}
121.~.~.~.~ Impact by sudden release of spring

DEFINITION

Classification: 433/121

Impact by sudden release of spring:

(under subclass 118) Apparatus including a resilient member which alternately stores and releases energy from the prime mover or power transmission to drive the tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151, for a hand manipulatable impact delivering tool which employs a spring which stores an energy input from the operator.

SEE OR SEARCH CLASS

173, Tool Driving or Impacting,

202+, for a spring driven hammerhead adapted to drive a tool.