Patents by Inventor Van Doan

Van Doan 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: 20070006952
    Abstract: There is provided a pneumatic tire including cross grooves which are provided on a tread portion in such a manner as to cross each other in an X shape, as well as cross each other symmetrically with respect to a tire transverse line, wherein assuming that a point of intersection between a tire circumferential line which passes through a point of intersection A of the cross grooves and a tire contact patch shaping line is a point of intersection B, a crossing angle of the cross grooves which lie to hold therebetween a tire transverse line which passes through the point of intersection A is ??, and an angle made by a tire circumferential line which passes through the point of intersection B and a tangential line to the tire contact patch shaping line at the point of intersection B is ??, the cross grooves satisfy the following conditions: when ??<45°, ??<?2.5×??+162.5°??1) when 45°???<60°, ??>?1.2×??+179°??2) when 60°????90°, ??>105°.
    Type: Application
    Filed: June 13, 2006
    Publication date: January 11, 2007
    Applicant: Toyo Tire & Rubber Co., Ltd.
    Inventors: Ichiro Shima, Van Doan