Patents by Inventor Glen A. Gruner

Glen A. Gruner 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).

  • Sander having a planar surface convertible to a right angular surface
    Patent number: 5947803
    Abstract: A hand operateable sander having a flat sanding block for sanding flat surfaces and which automatically pivots into a "V" shape for sanding outside corners and bullnose surfaces.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: September 7, 1999
    Inventor: Glen A. Gruner
  • Drywall bullnose cleaner tool
    Patent number: 5638570
    Abstract: A tool for scraping material from a bullnose installed on a corner joint of a drywall installation includes an elongated device having a handle portion, a first end portion, a second end portion, and a size adapted for holding in one hand. The first end portion has a first convexly shaped edge that matches a concavely shaped portion of the bullnose. It enables a user to scrape the material from the bullnose by moving the convexly shaped edge along the concavely shaped portion of the bullnose. Preferably, the first concavely shaped edge is shaped in a 75-degree arc of 0.875 inch radius to match a convexly shaped portion of the bullnose when the bullnose is installed on a 90-degree corner joint, and the second end portion of the elongated device includes a second convexly shaped edge that is shaped in a 50-degree arc of 1.125 inch radius to match the concavely shaped portion of the bullnose when the bullnose is installed on a 135-degree corner joint. One embodiment takes the form of a 6.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 17, 1997
    Inventor: Glen A. Gruner