Patents by Inventor Masayuki Hiroishi

Masayuki Hiroishi 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).

  • Mold for vulcanization of tire
    Patent number: 8002530
    Abstract: Provided is a mold for vulcanization of a tire which does not entail troublesome work including removing vent spews, and which does not spoil the external appearance of the tire with the spews, and prevents light failures from occurring in the tire. Vent grooves are formed in sidewall molding surfaces for molding sidewall parts in such a way as to extend zigzag in the tire circumferential direction. At least one vent hole is formed in each of the vent grooves.
    Type: Grant
    Filed: May 28, 2007
    Date of Patent: August 23, 2011
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Masayuki Hiroishi
  • MOLD FOR VULCANIZATION OF TIRE
    Publication number: 20090183811
    Abstract: Provided is a mold for vulcanization of a tire which does not entail troublesome work including removing vent spews, and which does not spoil the external appearance of the tire with the spews, as well as prevents light failures from occurring in the tire. Vent grooves (13, 14) are formed in sidewall molding surfaces (4, 5) for molding sidewall parts in such a way as to extend zigzag in the tire circumferential direction, respectively. At least one vent hole (11 or 12) is formed in each of the vent grooves (13, 14).
    Type: Application
    Filed: May 28, 2007
    Publication date: July 23, 2009
    Applicant: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Masayuki Hiroishi