Patents by Inventor Edgar Pollhammer

Edgar Pollhammer 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).

  • Lining-frame of latticework construction for galleries, tunnels or the like
    Patent number: 4597239
    Abstract: A lining-frame for a gallery or tunnel comprises two planar latticework trussed arches, each comprising an inner belt (3,4) and an outer belt (1,2) interconnected by a zig-zag rod chain (5,6). The arches are fixed parallel to one another by planar connector elements (81a,82a:81b,82b).
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: July 1, 1986
    Assignee: AVI Alpenlandische Veredelungs-Industrie Gesellschaft m.b.H.
    Inventors: Klaus Matz, Gerhard Ritter, Klaus Ritter, Edgar Pollhammer
  • Bending machine for wire or strip material
    Patent number: 4571974
    Abstract: A wire or strip bending machine has bending tools (1,2), each of which can act as an active tool or mandrel, mounted on an arm (3) which is slidable in a slot (11) in a rotatable disc (10). The disc is rotatable via gearing (13,14) to rotate one of the tools about the other, to bend material between the tools.
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: February 25, 1986
    Assignee: EVG Entwicklungs- u. Verwertungs-Gesellschaft mbH
    Inventors: Edgar Pollhammer, Klaus Ritter, Gerhard Ritter
  • Multispot grid-welding machine
    Patent number: 4529858
    Abstract: A multispot grid-welding machine has an electrode-carrier beam movable up and down and a plurality of guide rods mounting a plurality of electrode units for movement on the beam. Pressure springs bias the electrode units in a direction towards the grid being welded, each electrode unit being movable into a working position and a rest position in which it is retracted. A plurality of return springs act on the electrode units, the return springs being considerably weaker than the pressure springs and acting to shift the respective electrode units on the working position into the retracted position. Devices are provided for advancing selected electrode units into the working position by overcoming the force of the return springs.
    Type: Grant
    Filed: September 8, 1983
    Date of Patent: July 16, 1985
    Assignee: EVG Entwicklungs- und Verwertungs-Gesellschaft m.b.H.
    Inventors: Rudolf Scherr, Gerhard Schmidt, Edgar Pollhammer, Gerhard Ritter, Klaus Ritter
  • Device for the purpose of pushing sections of a wire through a solid body consisting of yielding material
    Patent number: 4506818
    Abstract: In order to be able to remove the wire from its supply source and in order to be able to prevent a bending of the wire, a wire-feed-clamp (3) can be moved along an alignment element (2) which, in a fixed position, is arranged on a carrier (1), whereby the wire-feed-clamp (3) produces a one-sided gripping effect and whereby a hollow needle (8) is affixed on the front side of the wire-feed-clamp (3), for the purpose of penetration of the solid body; at the rear extremity of the alignment element (2), a return-motion stopping-element (11) for the wire is arranged which, in the same sense as the wire-feed-clamp (3), produces a one-sided gripping effect and is aligned with the hollow needle (8) and whereby in front of the alignment element (2), a cutting element (20, 21) is arranged for the purpose of cutting-off the wire section which, at any given time, had been pushed through the solid body.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: March 26, 1985
    Assignee: EVG Entwicklungs- und Verwertungs-Gesellschaft m.b.H.
    Inventors: Gerhard Ritter, Klaus Ritter, Josef Ritter, Edgar Pollhammer