Patents by Inventor Max Dennis Fryrear

Max Dennis Fryrear 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).

  • Integral rippers for hydraulic excavator bucket
    Patent number: 4041624
    Abstract: An excavator bucket includes a pair of guide socket structures, each positioned inwardly of and adjacent a sidewall and the rear wall of the bucket. A pair of ripper shanks are included, one associated with each of the guide sockets, to be extended and retracted relative to the bucket. Each ripper shank may be selectively held in a retracted or an extended position relative to the bucket, and may be completely removed from the bucket if desired.
    Type: Grant
    Filed: April 17, 1974
    Date of Patent: August 16, 1977
    Assignee: Caterpillar Tractor Co.
    Inventor: Max Dennis Fryrear