US PATENT SUBCLASS 173 / 122
.~ Hammer head driven by relatively moving motion transmitting element

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

90  DF  IMPACTING DEVICES (E.G., HAMMERS) {19}
122.~ Hammer head driven by relatively moving motion transmitting element {2}
205  DF  .~.~> Rotary cam
124  DF  .~.~> Cyclically disconnected from motion transmitting element

DEFINITION

Classification: 173/122

(under subclass 90) Apparatus in which the means transmitting drive motion from a source of power to the hammer head includes an element which cyclically moves relative to the hammer head.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53+, for a hammer or tool shaft reciprocated by gripping means which release or yield to permit advance.

81+, for means to control advance and cyclically reciprocate a cable operated hammer or tool.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism, appropriate subclass for a mechanical movement or gearing of general utility, and including a hammer head as a nominal load.