Patents Represented by Attorney David R. Heckadon
  • Patent number: 5615979
    Abstract: A mine support bag comprises an inner fabric tube of selected length and selected circumference having an inner surface and outer surface. A first fabric sheet is laminated to the outer surface on the one side of the tube, the first fabric sheet having a width which is wider than half of the tube circumference. The first fabric sheet has longitudinal edges which run generally parallel with the length of the tube and extend beyond opposite lateral edges of the tube. A second fabric sheet is laminated to the opposite side of the tube, the second fabric sheet having a width which is wider than half of the tube circumference, the second fabric sheet having longitudinal edges which run generally parallel with the length of the tube and extend beyond opposite lateral edges of the tube. The respective lateral edges of the first and second sheets overlie each other and are laminated together.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: April 1, 1997
    Inventor: Fen-Fen Lin