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1967

GKN/Timber Research and Development Association (TRADA) study addresses the effect of timber shrinkage on the integrity of 1967conventional nails. The project delivers headless helical rods that interlock with the fibres of the timber along the full length of the anchors’ helix.

• British Patent No: 1233175 – W Ollis

1967

1984

Original roll-profiled helical wire fasteners (and twisted tubular ties) are commercially produced under Licence.1984

The helical pitch is introduced through a clamping and twisting operation in which one end of a length of profiled wire is secured in a fixed position and the other end held and spun. The twisting forces work their way along the length of the wire to form the helix. The tightly twisted ends portions are discarded to leave a usable length of helical wire having a pitch consistency that fluctuates by less than 2mm.

Thor Helical twisting die technology delivers patented helical wire product with “precise pitch” accuracy to within 1mm per kilometre (0.001mm/m) to supersede earlier brands of helical wire anchors.

• European Patent No: 0150906 – W Ollis
• European Patent No: 0171250 – W Ollis

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2001

Thor Helical development team design and build an energy efficient and zero waste twisting machinery, through which whole coils of wire are 2001 continuously forced to deliver consistent stress and pitch characteristics to tolerances that were not previously achievable.

Thor Helical twisting die technology delivers patented helical wire product with “precise pitch” accuracy to within 1mm per kilometre (0.001mm/m) to supersede earlier brands of helical wire anchors.

• European Patent No: 1307303 – W Ollis
• U.S. Patent No: 7269987 – W Ollis

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2001

Thor Helical develops helical fasteners having retaining heads or clips that offer great versatility when used to fix thin or friable layers. .

This range of headed helical fasteners is ideal for use in fastening insulation layers to a comprehensive range of masonry and timber construction elements, combining high speed installation with excellent and consistent performance reliability.

Download PDF Brochure:

Helical History
Helical Design Brief
Patented Precise Pitch

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