Patents by Inventor Masaki Hisamichi

Masaki Hisamichi 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).

  • Pneumatic tire having an asymmetric tread with a subgroove apex offset from the tread center
    Patent number: 5152852
    Abstract: A pneumatic tire having a tread comprising a plurality of straight-linear main grooves extending in the circumferential direction of the tire and a plurality of subgrooves extending to shoulder ends of the tire, crossing the main grooves at an inclination, wherein the subgrooves include in a central region of the width of a ground-contact area of the tread a curved portion which is convex in the direction of rotation of the tire and which is, in the condition of the tire of being mounted on a vehicle, located off the center of the width of the ground-contact area toward an outer side of the vehicle by a distance within a range of 5 to 15% of the width of the ground-contact area, and wherein subgrooves extending between the curved portion and the shoulder end on an outerside of the vehicle have an angle of inclination .theta.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: October 6, 1992
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Masaki Hisamichi, Hirohisa Hazama, Shuichi Tsukada