US PATENT SUBCLASS 173 / 118
.~ Spring bodily cyclically moved with hammer head

Current as of: June, 1999
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173 /   HD   TOOL DRIVING OR IMPACTING

90  DF  IMPACTING DEVICES (E.G., HAMMERS) {19}
118.~ Spring bodily cyclically moved with hammer head

DEFINITION

Classification: 173/118

(under subclass 90) Apparatus in which a resilient member is arranged to transmit force to a hammer head, and said member moves in entirety during each stroke of the hammer head.

(1) Note. A fluid spring is included as a resilient element for purposes of this definition.