Patents by Inventor Naoto Shibutani

Naoto Shibutani 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).

  • Patent number: 9951855
    Abstract: A cam follower is constituted by an outer ring which has an outer track surface in its inner circumference; a stud which has an inner track surface opposed to the outer track surface, a flange portion abutting on one side of the inner track surface, a side plate fitting portion and a mounting shaft portion abutting on another side of the inner track surface in this order, and a fiber flow formed continuously from the flange portion to the inner track surface along their outer circumferences; rolling elements which are arranged between the outer track surface and inner track surface; and an inner side plate which is pressed into the side plate fitting portion to work with the flange portion for limiting axial movement of the outer ring and the rolling elements.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 24, 2018
    Assignee: NTN CORPORATION
    Inventors: Naoto Shibutani, Seiji Kanbara, Shinji Oishi, Tomoaki Kawamura, Toshiaki Ensou
  • Patent number: 9482332
    Abstract: A cam follower is constituted by an outer ring which has an outer track surface in its inner circumference; a stud which has an inner track surface opposed to the outer track surface, a flange portion abutting on one side of the inner track surface, a side plate fitting portion and a mounting shaft portion abutting on another side of the inner track surface in this order, and a fiber flow formed continuously from the flange portion to the inner track surface along their outer circumferences; rolling elements which are arranged between the outer track surface and inner track surface; and an inner side plate which is pressed into the side plate fitting portion to work with the flange portion for limiting axial movement of the outer ring and the rolling elements.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: November 1, 2016
    Assignee: NTN CORPORATION
    Inventors: Naoto Shibutani, Seiji Kanbara, Shinji Oishi, Tomoaki Kawamura, Toshiaki Ensou
  • Publication number: 20150013420
    Abstract: A cam follower is constituted by an outer ring which has an outer track surface in its inner circumference; a stud which has an inner track surface opposed to the outer track surface, a flange portion abutting on one side of the inner track surface, a side plate fitting portion and a mounting shaft portion abutting on another side of the inner track surface in this order, and a fiber flow formed continuously from the flange portion to the inner track surface along their outer circumferences; rolling elements which are arranged between the outer track surface and inner track surface; and an inner side plate which is pressed into the side plate fitting portion to work with the flange portion for limiting axial movement of the outer ring and the rolling elements.
    Type: Application
    Filed: September 24, 2014
    Publication date: January 15, 2015
    Inventors: Naoto SHIBUTANI, Seiji KANBARA, Shinji OISHI, Tomoaki KAWAMURA, Toshiaki ENSOU
  • Publication number: 20120111141
    Abstract: An object of the present invention is to provide a compact and low cost cam follower by using a strong stud which does not have severed fiber flow due to cutting process and has a continuous fiber flow throughout all portions. A cam follower is constituted by an outer ring which has an outer track surface in its inner circumference; a stud which has an inner track surface opposed to the outer track surface, a flange portion abutting on one side of the inner track surface, a side plate fitting portion and a mounting shaft portion abutting on another side of the inner track surface in this order, and a fiber flow formed continuously from the flange portion to the inner track surface along their outer circumferences; rolling elements which are arranged between the outer track surface and inner track surface; and an inner side plate which is pressed into the side plate fitting portion to work with the flange portion for limiting axial movement of the outer ring and the rolling elements.
    Type: Application
    Filed: July 14, 2010
    Publication date: May 10, 2012
    Inventors: Naoto Shibutani, Seiji Kanbara, Shinji Oishi, Tomoaki Kawamura, Toshiaki Ensou