Patents Assigned to Technical Research Corporation
  • Impact driver for electric drill
    Patent number: 4098354
    Abstract: A rotary impact driver for converting continuous rotation to rotary impact forces, particularly suitable as an attachment for an electric drill. A hammer is supported upon the uniformly rotating input shaft by a plurality of flexible resilient elements capable of twisting about the shaft axis causing axial translation of the hammer when hammer rotation is momentarily restrained due to engagement with an anvil mounted upon an impact producing output shaft.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: July 4, 1978
    Assignee: Technical Research Corporation
    Inventor: Thomas F. Alcenius