Patents Assigned to Sigma Tool & Machine, a Partnership between Sigma Tool & Machine Ltd. and Sigma Fasteners, Ltd.
  • Patent number: 7575143
    Abstract: A portable device for inserting fixing elements into predefined seats in a work piece, the portable device including a drive head; a drive rod extending downward from the drive head; a hollow nose piece slidably fit around a lower end of the drive rod, the nose piece being attached to the head and being movable vertically by a predetermined distance with respect to the head and the drive rod; a magazine mounted on the nose piece at a predetermined angle with respect to a lower face of the nose piece for feeding a first fixing element into a horizontal slot on the lower face the nose piece; and a single-blow drive mechanism providing a force produced by a pressurized fluid to an upper end of the drive rod when the drive mechanism is triggered. The force on the drive rod drives the first fixing element into the predefined seat in the work piece.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: August 18, 2009
    Assignee: Sigma Tool & Machine, A Partnership Between Sigma Tool & Machine Ltd. And Sigma Fasteners, Ltd.
    Inventors: Keith G. Bromley, Sung Hsiang Liu
  • Patent number: 7571844
    Abstract: A portable device for inserting fixing elements into predefined seats in a work piece, the portable device including a drive head; a drive rod extending downward from the drive head; a hollow nose piece slidably fit around a lower end of the drive rod, the nose piece being attached to the head and being movable vertically by a predetermined distance with respect to the head and the drive rod; a magazine mounted on the nose piece at a predetermined angle with respect to a lower face of the nose piece for feeding a first fixing element into a horizontal slot on the lower face the nose piece; and a single-blow drive mechanism providing a force produced by a pressurized fluid to an upper end of the drive rod when the drive mechanism is triggered. The force on the drive rod drives the first fixing element into the predefined seat in the work piece.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: August 11, 2009
    Assignee: Sigma Tool & Machine, a Partnership between Sigma Tool & Machine Ltd. and Sigma Fasteners, Ltd.
    Inventors: Keith G. Bromley, Sung Hsiang Liu