Patents Assigned to Gary I. Zamel
  • Roof truss sling
    Patent number: 4767242
    Abstract: A roof truss sling having an open ended sleeve which has a wire strand passed through it and attached to bolts fixed in the mine roof. The sleeve is distorted so as to simultaneously crimp the sleeve to the wire strand and also shorten its length. The shortening of the length of the sleeve applies a tensile force between the roof bolts through the wire strand. This tensile force serves to compress the mine roof material and thus acts to truss the mine roof.
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: August 30, 1988
    Assignee: Gary I. Zamel
    Inventor: Raymond J. McLaren