US PATENT SUBCLASS 74 / 59
.~.~.~.~.~ Alternately rotated 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}
59.~.~.~.~.~ Alternately rotated screw

DEFINITION

Classification: 74/59

(under subclass 57) Mechanisms, including an axially grooved cam connected to a slide, the cam being alternately rotated as the slide alternately changes its direction.