Patents by Inventor Arthur C. Boyd

Arthur C. Boyd 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: 4142732
    Abstract: Disclosed herein is an improved hand truck having stair climbing capabilities of the general type employing a pair of star-like plates journaled on a main axle and carrying a plurality of stub axles on the projecting legs of the plate with each axle carrying a wheel to facilitate ascending or descending stairs. The type of truck in question operates so that one of the wheels will be in contact with the lands of two adjacent steps at all times to avoid jarring and to facilitate movement. The improvement disclosed includes the provision of braking means which will prevent "free-wheeling" of the plate so as to effectively slow up movement of the truck particularly when descending. The brake is operated from the handle end of the truck and releasably engages the main axle to either permit or prevent "free-wheeling" of the star-like plates to thereby selectively inhibit movement of the truck.
    Type: Grant
    Filed: August 23, 1977
    Date of Patent: March 6, 1979
    Inventor: Arthur C. Boyd