Patents by Inventor Donald J. Desaulniers

Donald J. Desaulniers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tool for extracting broken bolts and the like
    Patent number: 5251516
    Abstract: The tool includes a central section having a left-hand drill bit section at one end and an extraction section at the other. The extraction section tapers toward its distal end and is formed with left-hand threads on the exterior of the taper. The distal end is chamfered at an angle more abrupt than the taper so that the chamfer intercepts the threads and so that the threads rise outward in a short axial distance and are able to bite into the margins of a shallow hole drilled in the bolt remnant by the bit section.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: October 12, 1993
    Assignee: Alden Corporation
    Inventor: Donald J. Desaulniers
  • Tool for extracting broken bolts
    Patent number: D340184
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: October 12, 1993
    Assignee: Alden Corporation
    Inventor: Donald J. Desaulniers