Patent ID: 7770479
Filing Date: 2010-08-10
Classification: A61H,F04B,Y10S,Y10T

Abstract:
1. A scotch yoke motion transmission comprising: a member having laterally spaced substantially parallel guide first surfaces, a yoke slideably mounted on said guide first surfaces for movement along said guide first surfaces, said yoke having an opening, a second surface perpendicular to said guide first surfaces facing said opening, and a third surface parallel to the second surface, a shuttle located in said opening in sliding engagement with said second surface of the yoke, an anti-lash assembly mounted on the yoke and engageable with the third surface of the yoke and engageable with the shuttle to retain the shuttle in continuous sliding engagement with the second surface of the yoke, said anti-lash assembly including a plate located in engagement with the shuttle, at least one biasing member mounted on the yoke and engageable with the lash plate to bias the plate in engagement with the shuttle and maintain the second surface of the shuttle in continuous engagement with the second surface of the yoke, a guide mounted on the yoke engageable with the plate to retain the plate in assembled relation with the yoke and shuttle, said guide comprising a cylindrical pin secured to the yoke extended into a hole in the plate, an eccentric rotatably mounted on the shuttle, and a drive mechanism to turn the eccentric in a circular path to move the shuttle relative to the yoke and move the yoke along the guide first surfaces of the member.