Patents by Inventor Kirk Litzinger

Kirk Litzinger 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).

  • Metal matrix composite shafts for golf clubs
    Patent number: 6273829
    Abstract: Formed tubular sporting articles subjected to repeated flexure such as golf club shafts are made from metal matrix composite materials (MMCs) in which a metal alloy matrix is discontinuously reinforced with undissolved particles or platelets in proportions to result in an article having a variable wall thickness, and a minimum modulus of elasticity of 10.4 and a minimum yield strength and minimum modulus of elasticity related by the equation: Y=71+6.84(E−10.4) where Y is yield strength in KSI and E is modulus of elasticity in units×106 psi. The sporting articles are lighter than conventional and have a modulus of elasticity substantially less than that of ordinary MMCs.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: August 14, 2001
    Assignee: Jas. D. Easton, Inc.
    Inventors: Larry Carlson, Kirk Litzinger