Patents by Inventor Walter J. Mentzell

Walter J. Mentzell 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).

  • Load testing
    Patent number: 4643031
    Abstract: A method of testing the load lifting ability of a lifting device, including connecting the lifting device to a securement able to resist more force than a weight for which the lifting device is to be tested, and operating the lifting device until the force exerted by the lifting device on the securement equals said weight, wherein the improvement comprises that the securement is the lifting device itself. In a lifting device including a movable frame and lifting means on the frame for lifting loads, the improvement comprising means for enabling the lifting means to pull against the frame.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: February 17, 1987
    Inventor: Walter J. Mentzell
  • Load testing
    Patent number: 4509377
    Abstract: A method of testing the load lifting ability of a lifting device, including connecting the lifting device to a securement able to resist more force than a weight for which the lifting device is to be tested, operating the lifting device until the force exerted by the lifting device on the securement equals such weight, and displacing the lifting device under load for performing a moving load test.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: April 9, 1985
    Assignee: Mentzell Electric Co., Inc.
    Inventors: Walter J. Mentzell, Oscar L. Ganoe