Patents by Inventor Donald E. Ribbing

Donald E. Ribbing 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).

  • Bulldozer blade with improved tip and end bit
    Patent number: 3961788
    Abstract: A bulldozer blade comprises an upright member having a pair of laterally spaced end plates and a transversely disposed cutting edge secured thereon. A mounting plate is secured forwardly on the outboard side of each of the end plates and an adapter is secured forwardly on each of the mounting plates. An end bit and an earthworking tip are detachably mounted on each of the adapters.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: June 8, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Eugene L. Helton, Nathan Gutman, Donald E. Ribbing