Patents by Inventor Walter R. Curb

Walter R. Curb 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).

  • Extensible boom
    Patent number: 4133411
    Abstract: An extension and retraction mechanism for a three section extensible boom is disclosed utilizing an internally disposed hydraulic cylinder connected between a stationary boom section and an intermediate boom section with a cable connection located entirely interior of the boom having opposite ends anchored to opposite ends of the stationary section with the cable routed around sheaves on the moving end of the hydraulic cylinder and a base end of the intermediate boom section with a cable attachment to the base end of the inner boom section, the inner boom section being the most extensible boom section.
    Type: Grant
    Filed: February 11, 1977
    Date of Patent: January 9, 1979
    Assignee: Chamberlain Manufacturing Corporation
    Inventor: Walter R. Curb