Patents by Inventor Kenkichi Kuwahara

Kenkichi Kuwahara 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 of manufacturing rocker arm
    Patent number: 7360290
    Abstract: The present invention provides a method of manufacturing a rocker arm, having a process of rough processing, in which a metallic stock is subjected to compression-forming by cold forging to form a connecting portion, side wall lower portions of two side wall portions, and two projecting portions projecting beyond a rocker arm width outwardly from the side wall lower portions, and to form, at tip ends of the side wall lower portions, two stem guides projecting downwardly lower than a pat surface level of the connecting portion, a process of formation of a side wall, in which at least a part of the two projecting portions is subjected to ironing processing to form side wall upper portions of the two side wall portions, thereby forming the two side wall portions accommodated in a rocker arm width, and a process of working of a stem guide, in which the two side wall portions are subjected to ironing processing from outer surface sides, thereby increasing a projection height from which the stem guides project down
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: April 22, 2008
    Assignee: Otics Corporation
    Inventors: Eiichi Nozaki, Kenkichi Kuwahara, Satoshi Suzuki
  • Method of manufacturing rocker arm
    Publication number: 20070000297
    Abstract: The present invention provides a method of manufacturing a rocker arm, having a process of rough processing, in which a metallic stock is subjected to compression-forming by cold forging to form a connecting portion, side wall lower portions of two side wall portions, and two projecting portions projecting beyond a rocker arm width outwardly from the side wall lower portions, and to form, at tip ends of the side wall lower portions, two stem guides projecting downwardly lower than a pat surface level of the connecting portion, a process of formation of a side wall, in which at least a part of the two projecting portions is subjected to ironing processing to form side wall upper portions of the two side wall portions, thereby forming the two side wall portions accommodated in a rocker arm width, and a process of working of a stem guide, in which the two side wall portions are subjected to ironing processing from outer surface sides, thereby increasing a projection height from which the stem guides project down
    Type: Application
    Filed: June 26, 2006
    Publication date: January 4, 2007
    Applicant: OTICS CORPORATION
    Inventors: Eiichi Nozaki, Kenkichi Kuwahara, Satoshi Suzuki