Patents by Inventor Darwin Mandel

Darwin Mandel 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).

  • Axle lift mechanism
    Patent number: 3936072
    Abstract: A lift structure for attachment to the frame of a truck fitted with a tandem axle assembly, one of the axles being a drive axle. The structure comprises a pair of spaced pivotally mounted bell-cranks adapted to reach under the trailing axle of the tandem axle assembly and hydraulic cylinders for rotating the bell-cranks to lift the rear axle when it is unnecessary to use the additional load-bearing axle.
    Type: Grant
    Filed: October 23, 1974
    Date of Patent: February 3, 1976
    Inventor: Darwin Mandel