Patents by Inventor Kaichiro Nakajima

Kaichiro Nakajima 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).

  • Publication number: 20100179000
    Abstract: The invention provides a golf ball mold composed of a plurality of mold parts which removably mate to form a hollow interior spherical cavity having a cavity wall with a plurality of dimple-forming protrusions thereon and which have a parting surface that is formed in a convex shape and a concave shape matching the convex shape. All or some of the dimple-forming protrusions are formed at positions at least about 0.03 mm away from an outside edge of a convex portion of the parting surface. The mold eliminates the possibility that molding flash projecting out from the parting surface of the mold will enter the dimples, as a result of which the dimples are not affected by the trimming of flash. Golf balls manufactured with such a mold are able to effectively manifest the aerodynamic performance of dimples tightly and uniformly arranged on the surface of the ball.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 15, 2010
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Kaichiro Nakajima, Katsunori Sato