Patents Assigned to 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
  • Patent number: 6209722
    Abstract: A fastener strip with a grip portion, and flanges formed around the grip portion, and a membrane or membranes formed of flexible material, adhesive bonding a membrane to first sides of the flanges, with the fastener in sequential relation along the membrane and portions of a membrane bonded to second sides of the flanges, so that the membrane portions grip the flanges on both first and second side surfaces simultaneously.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: April 3, 2001
    Assignees: Sigma Tool & Machine, A Partnership of Sigma Tool & Machine Ltd., Sigma Fasteners Ltd.
    Inventor: Martin Leistner
  • Patent number: 5478002
    Abstract: A magnetic Tee-nut holder for use in a Tee-nut setting machine having a f guide channel for feeding and guiding Tee-nuts towards the end of the channel in registration with a rod for driving the endmost Tee-nut into a workpiece. The magnetic Tee-nut holder is positioned at the end of the channel for magnetically holding the endmost Tee-nut in a position in registration with the driving rod. Also disclosed is a method of magnetically holding a Tee-nut at the end of a feed guide channel of a Tee-nut setting machine, for driving by a driving rod.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: December 26, 1995
    Assignees: Sigma Tool & Machine, Partnership of Sigma Tool & Machine Ltd., Sigma Fasteners Ltd.
    Inventors: Ole Clement, Ivan J. Leko