Patents by Inventor Minoru Kohari

Minoru Kohari 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).

  • Method for manufacturing balls for bearing and products thereby
    Patent number: 6119347
    Abstract: A method of manufacturing steel balls for use in a ball bearing comprising an inner steel race or shaft with an inner raceway formed around its outer peripheral surface, an outer steel race with an outer raceway formed around its inner peripheral surface, and the steel balls freely rotatably disposed between the inner raceway and the outer raceway comprises the steps of providing steel balls, quenching the steel balls, preliminarily tempering the steel balls after quenched, rough-polishing the steel balls after preliminarily tempered, surface-hardening the steel balls after rough-polished, tempering the steel balls after surface-hardened, and finish-polishing the steel balls after tempered.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: September 19, 2000
    Assignee: NSK, Ltd.
    Inventors: Kiyoshi Hirakawa, Akira Suzuki, Jiami Pu, Katsunori Yanase, Minoru Kohari, Eiichi Takahashi, Yasushi Mutch
  • Method for manufacturing balls for bearing and products thereby
    Patent number: 5603576
    Abstract: A method of manufacturing steel balls for use in a ball bearing comprising an inner steel race or shaft with an inner raceway formed around its outer peripheral surface, an outer steel race with an outer raceway formed around its inner peripheral surface, and the steel balls freely rotatably disposed between the inner raceway and the outer raceway comprises the steps of providing steel balls, quenching the steel balls, preliminarily tempering the steel balls after quenched, rough-polishing the steel balls after preliminarily tempered, surface-hardening the steel balls after rough-polished, tempering the steel balls after surface-hardened, and finish-polishing the steel balls after tempered.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: February 18, 1997
    Assignee: NSK, Ltd.
    Inventors: Kiyoshi Hirakawa, Akira Suzuki, Jiami Pu, Katsunori Yanase, Minoru Kohari, Eiichi Takahashi, Yasushi Mutoh