Patents by Inventor George Barnard Murray

George Barnard Murray 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).

  • Patent number: 6484423
    Abstract: The invention relates to a dragline rigging system (10) which includes a pair of drag lines (12) connected to drag connection points (24) on a dragline bucket (18) for dragging the bucket through material to be excavated, a pair of hoist lines (14) connected to trunnions (30) on the dragline bucket for hoisting the bucket with excavated material during excavation, and a dump line (16) for lowering the front of the bucket (18) during dumping of excavated material. The dump line (16) is arranged to extend from the drag lines (12) over a pulley (52) linked to the hoist lines (14) and to a dump connection point (48) on the dragline bucket (18), and is in the form of a composite belt (42) which includes an inner material for receiving loads and an outer protective cover for resisting wear.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: November 26, 2002
    Assignee: Caterpillar Commercial SARL
    Inventor: George Barnard Murray