Patents by Inventor Bradley W. Niemi

Bradley W. Niemi 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).

  • Lifting apparatus including overload sensing device
    Patent number: 5662311
    Abstract: A load lifting apparatus comprising: a frame; a load engaging mechanism for engaging a load having a weight; a hoist mechanism for raising the load engaging mechanism, the hoist mechanism being mounted on the frame and including a member supporting the load engaging mechanism during lifting of the load, the member having therein an aperture; a sensor disposed in the aperture for detecting a force exerted by the load engaging mechanism on the member, the sensor providing a variable output indicative of the magnitude of the force; and a control for disabling the hoist mechanism when the output reaches a first predetermined value corresponding to the maximum load of the load lifting apparatus.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: September 2, 1997
    Assignee: Harnischfeger Corporation
    Inventors: Curt J. Waedekin, Bradley W. Niemi