Patents by Inventor Ronald F. Stewart

Ronald F. Stewart 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).

  • Low energy fuse and method of manufacture
    Patent number: 5509355
    Abstract: A low energy fuse is extruded as a single ply primary tube 1 from a plastic resin blend with particulate energetic material 2 being internally distributed in a manner known per se, said resin blend comprising a major amount of an orientable polymer, for example, linear low density polyethylene to provide structural integrity and a minor amount of a modifier to impart enhanced particle retentive properties to the tube and preferably also containing a polymer or copolymer to impart melt strength and aid in tube extrusion.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: April 23, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: Ronald F. Stewart, David J. Welburn, David M. Welsh, Robert C. Greenhorn
  • Low energy fuse and method and manufacture
    Patent number: 5317974
    Abstract: A low energy fuse is extruded as a single ply primary tube 1 from a plastic resin blend with particulate energetic material 2 being internally distributed in a manner known per se, said resin blend comprising a major amount of an orientable polymer, for example, linear low density polyethylene to provide structural integrity and a minor amount of a modifier to impart enhanced particle retentive properties to the tube and preferably also containing a polymer or copolymer to impart melt strength and aid in tube extrusion.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: June 7, 1994
    Assignee: Imperial Chemical Industries PLC
    Inventors: Ronald F. Stewart, David J. Welburn, David M. Welsh, Robert C. Greenhorn
  • Low energy fuse
    Patent number: 5166470
    Abstract: A non-electric low energy fuse comprises plastics tubing within which there is provided a core loading of mixed particles which are reactive or detonable to provide signal transmission means wherein the plastics tubing is an extruded tubing and has an outer skin of a hydrophilic polymer to enhance the oil resistance of the fuse.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: November 24, 1992
    Assignee: Imperial Chemical Industries plc
    Inventor: Ronald F. Stewart