Patents by Inventor Richard T. Zimmer

Richard T. Zimmer 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).

  • Rotary cutting mechanism
    Patent number: 5109656
    Abstract: A rotary cutting mechanism having crossed blades mounted one above the other on a common shaft. Each of the blades has a cutting edge located at each outer end and facing in the direction of rotation. The outer ends of the upper blade are displaced downwardly so that its cutting edges lie in substantially the same plane as the cutting edges of the lower blade.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: May 5, 1992
    Inventor: Richard T. Zimmer