Patents Assigned to Unicorn Abrasives Limited
  • Dressing of grinding wheels
    Patent number: 6544106
    Abstract: A method of dressing a grinding wheel by advancing a dressing tool across the surfaces to be dressed, the method comprising first moving the dressing tool across each side portion to remove material to make the wheel of predetermined width and then across the edge of the wheel to form corner radii, wherein the dressing tool is rotated as it is advanced and the speed of advancement across the side surfaces is different from that across the edge.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: April 8, 2003
    Assignee: Unicorn Abrasives Limited
    Inventors: Donald McHugh, Jay Merkle
  • Grinding wheel
    Patent number: 6213860
    Abstract: A grinding wheel for use in grinding glass, has an outer periphery of abrasive material secured to a body portion made of a lightweight material.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: April 10, 2001
    Assignee: Unicorn Abrasives Limited
    Inventors: John Tunstall, George Laskaris
  • Dressing of grinding wheels
    Patent number: 5647788
    Abstract: A grinding machine including a bed to receive a workpiece and a plurality of grinding wheels mounted on at least one side of the bed for grinding surfaces of a workpiece received in the bed. The grinding machine includes at least one dressing tool being mounted on a slide arranged for movement towards and away from the grinding surfaces of the grinding wheels, the slide being mounted on a carriage for movement generally parallel to the bed, the slide and the carriage being movable by a prime mover under control of a microprocessor.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: July 15, 1997
    Assignee: Unicorn Abrasives Limited
    Inventors: Donald Raymond McHugh, James Edward Sanders