Patents by Inventor G. Edwin Malzahn

G. Edwin Malzahn 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).

  • Directional rod pusher
    Patent number: 5070948
    Abstract: The present invention comprises a rod pusher device which moves a drill string having a directional boring bit at its leading end. The invention includes a conversion device to automatically and simultaneously convert the axial movement of the drill string into a combined axial and rotational movement of the drill string. The conversion device is selectively engageable so that the push rod operator can readily select between axial movement of the drill string or combined axial and rotational movement, and thereby control the path of the borehole.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: December 10, 1991
    Assignee: The Charles Machine Works, Inc.
    Inventors: G. Edwin Malzahn, Kenneth W. Schuermann
  • Directional rod pusher
    Patent number: 4945999
    Abstract: The present invention comprises a rod pusher device which moves a drill string having a directional boring bit at its leading end. The invention includes a conversion device, such as a RIGID link, mounted between a fixed point on the hydraulic thrust cylinder or frame assembly and the moveable drill string to automatically and simultaneously convert the axial movement of the thrust cylinder and drill string into a combined axial and rotational movement of the drill string. The link is removable so that the push rod operator can readily select between axial movement of the drill string or combined axial and rotational movement, and thereby control the path of the borehole.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: August 7, 1990
    Assignee: The Charles Machine Works, Inc.
    Inventor: G. Edwin Malzahn