Patents Represented by Attorney Marshall, Gerstein & Borum LLP
  • Patent number: 7118310
    Abstract: A truss shoe for use on a mine roof truss having at least one inclined bolt and at least one horizontal cross member comprises a base including a first end, a second end, a first side and a second side extending between the first and second ends, a generally planar bearing surface, and a top side disposed opposite the bearing surface, the bearing surface arranged for contact with the mine roof. A stanchion is formed on the top side and includes a bore extending from a top end of the stanchion through the bearing surface, the bore sized to receive the inclined bolt. A bracket is formed on the top side and includes a laterally extending slotted bore sized to receive the horizontal bolt. A portion of the first end and a portion of the first side cooperate to form a curved edge.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: October 10, 2006
    Assignee: Dywidag-Systems International, U.S.A., Inc.
    Inventors: Alexander I. Wallstein, Roland Walker