Patents Assigned to Western Rock Bit Co., Ltd.
  • Digger tooth retainer
    Patent number: 4086713
    Abstract: A retainer for retaining a shank in a recess. The retainer is in the form of a resilient collar having an inner surface co-acting with the shank and a peripheral surface co-acting with the walls of the recess. The peripheral surface is eccentrically displaced with respect to the inner surface. The inner surface of the retainer and the co-acting surface of the shank have complementary regular polygonal shapes.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: May 2, 1978
    Assignee: Western Rock Bit Co., Ltd.
    Inventor: Kenneth M. White