Patents by Inventor Richard W. Roberts, deceased

Richard W. Roberts, deceased 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).

  • Dual range infinitely variable transmission
    Patent number: 4990127
    Abstract: A dual range infinitely variable transmission utilizes a continuously variable speed mechanism in conjunction with a fixed ratio speed mechanism to provide two power paths from the input to the rotatable output. A jaw clutch is utilized to switch between the high range and low range of the transmission. A reaction type clutch is utilized to provide a positive neutral for the transmission.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: February 5, 1991
    Assignee: Borg-Warner Automotive, Inc.
    Inventors: Richard W. Roberts, deceased, Richard L. Smirl, Herbert N. Underwood