Patents by Inventor M. Joe Luthy

M. Joe Luthy 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).

  • Direct tension indicator for embedded anchor members
    Patent number: 6135687
    Abstract: A device used to indicate whether a predetermined compressive load has been applied to the device. The device is formed to receive an anchor member upon which a tensioning force is to be applied in conjunction with loading the device. The device itself has an upper press that has an aperture formed to receive the anchor member and also has means for manipulating a washer. The device also has a lower die with an aperture formed to receive the anchor member. The lower die is formed so as to be able to work in conjunction with the upper press when the upper press and lower die are aligned and moved towards each other. The lower die also has means for manipulating the washer. The means for manipulating the washer are also formed to cooperate with the means for manipulating the washer on the upper press. The device also has a washer that lies between the upper press and the lower die.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: October 24, 2000
    Assignee: Simpson Strong-Tie Co., Inc.
    Inventors: William F. Leek, M. Joe Luthy