Patents by Inventor Gunther Kirz

Gunther Kirz 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: 4171924
    Abstract: A multipartite rock bolt includes a plurality of individual discrete elems which are connected to each other at their respective end portions to constitute the rock bolt which is anchored, especially cemented, in a hole of the rock to be consolidated by the rock bolt. The end portions of the elements have complementary recesses therein at which the respective assembled elements overlap each other and the connecting arrangement for connecting the respective end portions includes a projection, particularly a pin which extends transversely of the elongation of the element into the recess and is received in a complementary aperture, particularly a hole, provided at the recess of the other element. The recess is partially bounded by a detaining surface extending substantially longitudinally of the element, and the detaining surface may be inclined relative to the elongation of the element.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: October 23, 1979
    Assignees: Bergwerksverband GmbH, Saarlandische Gesellschaft fur Grubenausbau und Technik mbH
    Inventors: Fritz Schuermann, Johannes Neubauer, Gunther Kirz, Heinz Fuchs