Patents by Inventor William Joseph Jarvis

William Joseph Jarvis 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).

  • Longwall machine with captivating bracket
    Patent number: 4055367
    Abstract: A ranging arm mining machine traversable to and fro along a fixed guide extending along a working face is provided with a bracket assembly secured to a support trunnion for a ranging arm carrying a cutter drum such that in use the machine is trapped or captivated to the guide.
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: October 25, 1977
    Assignee: Coal Industry (Patents) Limited
    Inventor: William Joseph Jarvis
  • Track-mounted shoe-supported inclining mining machine
    Patent number: 4054321
    Abstract: The shoes on the goaf side of a longwall mineral mining machine comprise pivotally connected components so that the machine can hinge about these shoes during steering adjustments. Longitudinal pins connect components of goaf side shoes so that a pinion driven by the machine is maintained in engagement with a rack fixed to the track.
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: October 18, 1977
    Assignee: Coal Industry (Patents) Ltd
    Inventor: William Joseph Jarvis