Actuant Corporation

Thomas F Mathews

Paul A Hohensee

Stanley A Landry

Robert K Van Noord

Stan Landry

Frantz D Stanford

Winfred E Mandody

A wedge for a concrete post-tension reinforcement anchorage system is shaped such that the compressive force on the tendon after tensioning of the anchorage system is substantially evenly distributed over a length of the outer surface of the tendon that is engaged by the internal surface of the wedge. The external surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being larger than the first taper angle. The internal surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being greater than the first taper angle. An anchor with a bore with two taper angles and tooth profiles of threading patterns on the internal surface of the wedge are also disclosed.

Post-tension anchor wedge with flat valleys between pairs of radius tip teeth

Post-tensioning anchorage with equalized tendon loading

A cable anchor has ball surfaces that permit misalignment between the cable and a stem of the anchor, and a fitting that permits the introduction of a corrosion inhibitor to the interior of the anchor.

Cable anchor

The present invention provides a slab lift bracket that includes an collar portion with a center, an upper surface, a lower surface, an outer surface, and an inner surface. The slab lift bracket also includes a plurality of protruding members that are distributed around and fixed to the collar portion. The protruding members extend outwardly and downwardly of the collar portion at spaced apart locations, and have a hook shaped free end.

Slab lift bracket

Growing community of inventors

Fort Worth, TX, United States of America

Thomas F Mathews