US PATENT SUBCLASS 74 / 58
.~.~.~.~.~ Multiple screw

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

*  DD  MECHANICAL MOVEMENTS {15}
25  DF  .~ Rotary to or from reciprocating or oscillating {20}
55  DF  .~.~ Cam and slide {2}
56  DF  .~.~.~ Axial cam {1}
57  DF  .~.~.~.~ Grooved {2}
58.~.~.~.~.~ Multiple screw

DEFINITION

Classification: 74/58

(under subclass 57) Mechanisms, including two axially grooved cams or screws rotating in opposite directions, one of which drives or is driven by the reciprocated or oscillated member or slide in one direction and the other in the opposite direction.