Patents by Inventor Joseph F. Throop

Joseph F. Throop 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).

  • Multilayer laminate of improved resistance to fatigue cracking
    Patent number: 4197360
    Abstract: A multilayer bi-metallic laminate of improved resistance to the initiation nd propagation of fatigue cracking and fracture is obtained by intimately bonding, alternate sheets of the two metals one of the metals having a modulus of elasticity at least 20% greater than the other metal. Prior to the bonding step the sheets of the stronger metal are stretched so that when they are released after the bonding step they are left in a state of residual tension while the sheets of the weaker metal are left in a state of residual compression. The residual compression in the weaker metal inhibits fatigue cracking of the laminate while the residual tension in the stronger metal has little effect on the crack resistance thereof.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: April 8, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Joseph F. Throop