Patents by Inventor Thomas F. Mathews

Thomas F. Mathews has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Post-Tensioned Concrete Reinforcement Anchor Assembly With Radiused Tooth Tips
    Publication number: 20150345142
    Abstract: 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.
    Type: Application
    Filed: July 28, 2015
    Publication date: December 3, 2015
    Applicant: ACTUANT CORPORATION
    Inventors: Thomas F. Mathews, Stanley A. Landry, Paul A. Hohensee
  • Post-tension anchor wedge with flat valleys between pairs of radius tip teeth
    Patent number: 9163405
    Abstract: 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.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: October 20, 2015
    Assignee: Actuant Corporation
    Inventors: Thomas F. Mathews, Stanley A. Landry, Paul A. Hohensee
  • High Performance Wedge Design for Post-Tension Anchorage
    Publication number: 20140245678
    Abstract: 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.
    Type: Application
    Filed: May 15, 2014
    Publication date: September 4, 2014
    Applicant: Actuant Corporation
    Inventors: Thomas F. Mathews, Stanley A. Landry, Paul A. Hohensee
  • Post-tensioning anchorage with equalized tendon loading
    Patent number: 8756885
    Abstract: 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.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: June 24, 2014
    Assignee: Actuant Corporation
    Inventors: Thomas F. Mathews, Stanley A. Landry, Paul A. Hohensee
  • Cable anchor
    Patent number: 8276334
    Abstract: 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.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: October 2, 2012
    Assignee: Actuant Corporation
    Inventors: Thomas F. Mathews, Stan Landry, Robert K. Van Noord
  • Slab lift bracket
    Patent number: 8171678
    Abstract: 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.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 8, 2012
    Assignee: Actuant Corporation
    Inventors: Frantz D. Stanford, Thomas F. Mathews, Winfred E. Mandody, Paul A. Hohensee
  • Cable Anchor
    Publication number: 20120031035
    Abstract: 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.
    Type: Application
    Filed: October 12, 2011
    Publication date: February 9, 2012
    Inventors: Thomas F. Mathews, Stan Laundry, Robert K. Van Noord
  • Cable anchor
    Patent number: 8051615
    Abstract: 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.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: November 8, 2011
    Assignee: Actuant Corporation
    Inventors: Thomas F. Mathews, Stan Landry, Robert K. Van Noord
  • Slab Lift Bracket
    Publication number: 20100186313
    Abstract: 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.
    Type: Application
    Filed: January 28, 2009
    Publication date: July 29, 2010
    Inventors: Frantz D. Stanford, Thomas F. Mathews, Winfred E. Mandody, Paul A. Hohensee
  • CABLE ANCHOR
    Publication number: 20080282640
    Abstract: 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.
    Type: Application
    Filed: May 14, 2008
    Publication date: November 20, 2008
    Inventors: Thomas F. Mathews, Stan Landry, Robert K. Van Noord