Patents by Inventor William E. Robinson

William E. Robinson 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).

  • Apparatus for bending plastic pipe
    Patent number: 5580589
    Abstract: The apparatus comprises a frame having a die pivotally connected to it at one end and anchorage means pivotally connected to it at the other end. The anchorage means carries a first roller. A second roller is adjustable transverse to the frame. A pipe pusher is integral with the die. The frame has adjustable legs to set the angle of the fame. A plastic pipe is pulled through the die and through the host pipe and is bent between the first roller, the second roller and the die. The frame fully contains the reactions arising owing to the bending of the pipe.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: December 3, 1996
    Assignee: British Gas plc
    Inventors: Derek Stoves, William E. Robinson