Patents by Inventor Richard P. McMahon

Richard P. McMahon 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).

  • Patent number: 5604967
    Abstract: A dowel extraction device comprising: an inner cylinder formed in a generally cylindrical configuration with an upper surface and a lower surface, the lower surface including a bore extending therein, the bore including adjustable coupling devices to permit gripping of dowels having different diameters; a central shaft formed an elongated cylindrical configuration with a plurality of external screw threads, the shaft being fixedly attached to the upper surface of the inner cylinder, a nut having a threaded aperture adapted to be threadedly coupled to the central shaft; and an outer cylinder formed in a hollow generally cylindrical configuration with a closed upper end and an open lower end, the upper end including an aperture, the outer cylinder being positioned over the inner cylinder with the central shaft extending through the aperture, the nut being coupled to the shaft above the upper end of the outer cylinder, the apparatus adapted to grip and vertically remove a dowel by rotating the large nut thereby
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: February 25, 1997
    Inventor: Richard P. McMahon