Patents by Inventor Gerald M. Stonesifer

Gerald M. Stonesifer 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).

  • Caulking gun with means to prevent rotation of compound cartridge during use and to provide positive pressure release
    Patent number: 4706853
    Abstract: A caulking gun adapted to receive a tube-like cartridge of compound, wherein the cartridge has a piston in one end which expels compound from a dispensing nozzle as the piston is moved forward in the cartridge towards the dispensing nozzle. The gun includes a cartridge holder, a handle attached to the cartridge holder, and a trigger cooperating with the handle to urge a stem fixed against rotational movement relative to said cartridge holder and a disk fixed on the stem against rotational movement relative to the stem against the piston of the cartridge to expel compound from the discharge nozzle. One outwardly projecting prong is eccentrically positioned on the disk in contact relation with the piston of the cartridge for wedging into the contact surface of the piston without puncturing through the piston into the cartridge, whereby compound is prevented from leaking.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: November 17, 1987
    Inventors: Gerald M. Stonesifer, Charles E. Harkey