Patents by Inventor Richard Wayne Shrum

Richard Wayne Shrum 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).

  • Belt sander
    Patent number: 5957758
    Abstract: A portable belt sander includes two rotatable arms, each of which is urged outward by a torsion spring. The compression resistance of the torsion spring may be increased by compressing a bladder provided within the coil of the torsion spring. The arms may be locked in their maximum outward position by spring catches and a plate secured to the arms.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: September 28, 1999
    Inventor: Richard Wayne Shrum