Patents by Inventor Peter P. Riggs

Peter P. Riggs 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).

  • Lubricated and thermoplastic impregnated wire rope
    Patent number: 4606183
    Abstract: A wire rope including a core surrounded with a plurality of wound strands. The rope is encapsulated with a thermoplastic after the application of a lubricant blend including amorphous polypropylene.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: August 19, 1986
    Assignee: AMSTED Industries Incorporated
    Inventor: Peter P. Riggs
  • Plastic filled wire rope with strand spacer
    Patent number: 4602476
    Abstract: A wire rope is provided having a central core strand about which are wound outer strands. Non-linear spacer wires are present in the gaps between outer strands to assure the uniformity of such gaps and provide passageways from the interior to the exterior of the wire rope. A coating, usually of a suitable thermoplastic, is extruded into such rope to extend continuously from the core and between adjacent outer strands and through the passageways.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: July 29, 1986
    Assignee: AMSTED Industries Incorporated
    Inventors: Peter P. Riggs, Harry L. Data
  • Plastic encapsulated wire rope
    Patent number: 4534162
    Abstract: A wire rope is provided having a central core strand about which are wound outer strands. Spacer strands are present in the gaps between such core strand and outer strands to assume the uniformity of such gaps. A coating, usually of a suitable thermoplastic, is extruded into such rope to provide a spacer between such core and such outer strands, and between adjacent outer strands.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: August 13, 1985
    Assignee: AMSTED Industries Incorporated
    Inventors: Peter P. Riggs, Harry L. Data, Robert B. Hoganson, Jr.
  • Fiber reinforced plastic impregnated wire rope
    Patent number: 4422286
    Abstract: Reinforced thermoplastic impregnated lubricated wire ropes are provided in the present invention. A method of reinforcing and filling the thermoplastic material with fibers, mineral fillers and powders is also provided.
    Type: Grant
    Filed: February 8, 1982
    Date of Patent: December 27, 1983
    Assignee: AMSTED Industries Incorporated
    Inventors: Neville H. Simpson, Peter P. Riggs, Warren W. Rasmussen