US PATENT SUBCLASS 74 / 831
.~ Stroke adjustable to zero and/or reversible in phasing

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

828  DF  ALTERNATING-MOTION DRIVEN DEVICE WITH MEANS DURING OPERATION TO ADJUST STROKE {2}
831.~ Stroke adjustable to zero and/or reversible in phasing {6}
832  DF  .~.~> Plural driving means to jointly drive the driven device
833  DF  .~.~> Device driven from selected points on oscillating link
834  DF  .~.~> Driving lever with adjustable pivot point
835  DF  .~.~> Eccentric and strap drive, shiftable eccentric {1}
837  DF  .~.~> Crank pin drive, shiftable pin
838  DF  .~.~> Cam and follower drive {1}

DEFINITION

Classification: 74/831

(under subclass 828) Mechanisms wherein the stroke can be diminished to the point of no motion and/or be caused to act in a direction cyclically opposite to that in which it has been operating.