Patents by Inventor August Sandstad

August Sandstad 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).

  • Gate breaker
    Patent number: 4915156
    Abstract: A gate breaker, for the finishing of cast iron, consisting of a hydraulic cylinder which is operatively connected to a processing unit, preferably a wedge, at one end at least. The hydraulic cylinder is suspended from a circular clamp (29) with an internal semicircular track for two or more rollers (27) connected to the hydraulic cylinder. Between the hydraulic cylinder of the tool unit and the rollers (27) there is a pivot which permits pivotal movement of the gate breaker about a transverse axis of the unit.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: April 10, 1990
    Inventor: August Sandstad