Patents by Inventor Joe L. Ratigan

Joe L. Ratigan 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).

  • Method and apparatus for determining tensile strength
    Patent number: 4444058
    Abstract: A method and apparatus for determining the statistical distribution of apparent tensile strength of rock, the size effect with respect to tensile strength, as well as apparent deformation modulus of both intact and fractured or jointed rock. The method is carried out by inserting a plug of deformable material, such as rubber, in an opening of a specimen to be tested. The deformable material is loaded by an upper and lower platen until the specimen ruptures, whereafter the tensile strength is calculated based on the parameters of the test specimen and apparatus.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: April 24, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Joe L. Ratigan