Patents by Inventor John Bancroft

John Bancroft 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).

  • Scraper device
    Patent number: 4344525
    Abstract: A scraper device for a belt conveyor has an elongate scraper blade for extending the width of the belt conveyor and carried by a support unit mounted on a supporting framework. The support unit includes an elongate bar engaged at each end in a ring rotatably supported in a slide block resiliently slidable in a U-bracket of the supporting framework. An axial shear pin traverses the slide block and ring to resist relative rotation therebetween until excessive torque is applied to the blade.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: August 17, 1982
    Assignee: J. H. Fenner & Co. Ltd.
    Inventors: John Bancroft, John L. Greenhalgh, Ronald Smith