Patents by Inventor John E. Groth

John E. Groth 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: 5067844
    Abstract: A position coupler for connecting reinforcing bar in concrete construction where neither bar is able to rotate either conveniently or not at all includes a sleeve at least a portion of which is internally cylindrically threaded and which receives at least one split collar insert. The insert has external cylindrical threads which match the internal cylindrical threads of the sleeve and also has internal tapered threads which match the tapered external threads on the bars to be joined. The inserts, in addition to being longitudinally split are provided with either a transverse slot or a hex head on their outer ends to receive a wrench. When a transverse slot is provided a spanner wrench may be inserted between the bar and sleeve. The tightening of the insert creates a wedge action which hoop stresses the sleeve locking the parts together and reduces slippage. The insert may be locked anywhere along the interior of the cylindrical thread portion of the sleeve to connect bars at different axial spacings.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: November 26, 1991
    Assignee: Erico International Corporation
    Inventors: Geoffrey M. Bowmer, John E. Groth
  • Patent number: 4955825
    Abstract: An electrical fixture for mounting a cover plate over a wall opening which eliminates the necessity of installing an outlet box within such wall opening to facilitate the mounting of the cover plate. In a preferred embodiment the fixture comprises a rectangular plate having a front and rear surface, and a major opening and a pair of screw openings extending therethrough. Extending from the longer side edges of the major opening essentially perpendicular to the front and rear surfaces are a pair of flanges which serve to provide lateral support for the fixture within the wall opening. Extending from the center of the narrower top and bottom edges of the major opening are a pair of diametrically opposed deformable fingers which, upon insertion of the fixture within a wall opening, may be bent firmly to secure the fixture within the opening.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: September 11, 1990
    Assignee: Erico International Corporation
    Inventors: John E. Groth, Martin F. Delmore, Raymond S. Laughlin