Patents by Inventor Robert M. Sandvick, Sr.

Robert M. Sandvick, Sr. 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: 4039087
    Abstract: A hydraulic ram is secured to a frame member which includes a pivotally attached scissor clamp for securing the frame member to the outer circumference of a first pipe section. The shaft of the hydraulic ram is extended and retracted by hydraulic fluid under pressure supplied by a hydraulic pump driven by a battery powered electric motor. The shaft is secured to cables which are coupled to an adjacent pipe section. As the shaft retracts, it draws the adjacent section of pipe into longitudinal abutting contact with the first pipe section.
    Type: Grant
    Filed: November 17, 1976
    Date of Patent: August 2, 1977
    Inventor: Robert M. Sandvick, Sr.