Patents by Inventor Gary R. Thureson

Gary R. Thureson 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: 5631440
    Abstract: An isolation member (34) for use in a non-electric detonator cap (10) has an interior passageway (40) extending therethrough and defining a positioning region (44) and a discharge port (56). Positioning region (44) provides a series of interior shoulders (46), (48) and an entry shoulder (52) respectively sized to receive and seat therein signal transmission lines of different outside diameters, thereby longitudinally orienting and spacing the signal-emitting end (30a) from the receptor charge (14). The isolation member (34) is preferably made of a semi-conductive material to bleed off to the shell (12) any static electricity charges transmitted through the signal transmission line (shock tube 30) so as to prevent static discharge initiation of the receptor charge (14).
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: May 20, 1997
    Assignee: The Ensign-Bickford Company
    Inventors: Gary R. Thureson, Eric R. Davis, Ernest L. Gladden, Alvaro Zappalorti
  • Patent number: 5597973
    Abstract: A signal transmission fuse (10, 20) such as shock tube has an outside diameter (OD) not greater than about 2.380 mm (0.0937 inch), for example, a tube outside diameter (OD) of from about 0.397 to 2.380 mm (about 0.0156 to 0.0937 inch), and the ratio of the inside diameter (ID) of the tube to the radial thickness of the tube wall (T) is from about 0.18 to 2.5. The inside diameter (ID) of the tube may be from about 0.198 to 1.321 mm (about 0.0078 to 0.0520 inch). The powder surface density of the reactive material contained within the bore (16, 30) of the fuse (10, 20) may, but need not, be significantly less than that which the prior art considers to be a minimum acceptable powder surface density.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: January 28, 1997
    Assignee: The Ensign-Bickford Company
    Inventors: Ernest L. Gladden, Gary R. Thureson, Alvaro Zappalorti, Eric R. Davis, Frank J. Lucca
  • Patent number: 5501151
    Abstract: An isolation member (34) for use in a non-electric detonator cap (10) is of substantially cylindrical shape and has an interior passageway (40) extending therethrough and defining a positioning region (44) and a discharge port (56). Positioning region (44) is dimensioned and configured to snugly receive and seat therein a signal transmission line (30) and to orient the signal-emitting end (30a) thereof to aim along the longitudinal axis of cap (10) through a diaphragm (42) at the target provided by receptor charge (14). The isolation member is positioned between, and spaces the signal-emitting end (30a) of the signal transmission line (30) from, the receptor charge (14) contained in the detonator cap. The isolation member comprises grooves (58, 58a, 58b) to provide an alternate flow path through which a signal emitted by the discharge end (30a) of a signal transmission line (30) can reach the receptor charge (14) should the signal fail to burst the diaphragm (42 ).
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: March 26, 1996
    Assignee: The Ensign-Bickford Company
    Inventors: Gary R. Thureson, Eric R. Davis, Steven R. Pellon, Alvaro Zappalorti, Ernest L. Gladden
  • Patent number: 4757764
    Abstract: A nonelectric blasting system, method and device is disclosed for use in establishing a time sequential firing of blasting elements, the device comprised of an elongated tube which contains a low velocity deflagration mixture adhered to the inner walls of said tube. The device, by itself, controls a desired initiation pattern of a plurality of blasting elements by transmitting an initiation signal at a much reduced velocity than conventional shock tube or explosive cord by use of preselected material mixtures.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: July 19, 1988
    Assignee: The Ensign-Bickford Company
    Inventors: Gary R. Thureson, Ernest L. Gladden
  • Patent number: 4607573
    Abstract: A fuse having two juxtaposed coextensive tubular housing layers is provided with a reactive material deposited within the inner tube, which inner tube is elongated or stretched before forming the outer tubular layer. In the method of manufacture, the inner tubular member is provided with a reactive material, primarily along its inner surface, thereafter stretched to provide the desired inner tube dimensions with the desired reactive material core load per unit length, the stretched tube is then provided with an outer tubular covering.
    Type: Grant
    Filed: April 3, 1984
    Date of Patent: August 26, 1986
    Assignee: Ensign-Bickford Industries, Inc.
    Inventors: Gary R. Thureson, Ernest L. Gladden