Patents Assigned to Sundstand Corp.
  • Bidirectional drive with a unidirectional irreversibility mechanism
    Patent number: 4842109
    Abstract: A bidirectional drive has a unidirectional irreversibility mechanism (22) which includes a ratchet and pawl composed of a fixed outer annular gear (32) surrounding parallel plates (26, 30) attached to the input and output shafts (24,28). The pawl lever (36) is pivotably mounted on the output shaft plate (26) and driven in one direction by a pin (50) on the input shaft plate (26) against the force of a spring (44). Engaging protrusions (54) on each shaft plate (26, 30) are utilized when rotation is in the opposite direction.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: June 27, 1989
    Assignee: Sundstand Corp.
    Inventor: Eli Avny