Patents by Inventor Naoyuki Oga

Naoyuki Oga 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).

  • Marine reversing gear assembly
    Patent number: 7690251
    Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: April 6, 2010
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Kazuyoshi Harada, Yoshiaki Terasawa, Naoyuki Oga, Hideo Misao
  • Marine reversing gear assembly
    Publication number: 20080194158
    Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.
    Type: Application
    Filed: March 31, 2008
    Publication date: August 14, 2008
    Inventors: Kazuyoshi Harada, Yoshiaki Terasawa, Naoyuki Oga, Hideo Misao
  • Marine reversing gear assembly
    Patent number: 7364483
    Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: April 29, 2008
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Kazuyoshi Harada, Yoshiaki Terasawa, Naoyuki Oga, Hideo Misao
  • Marine reversing gear assembly
    Publication number: 20060073747
    Abstract: The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil supply circuit 10 have a common structure of an oil line joint surface for the hydraulic oil supply circuit 10 for friction discs of a forward clutch 2f and a reverse clutch 2a, and the forward/reverse directional control valve 7 for the hydraulic oil supply circuit 10 can be changed to either the manual directional control valve 7a or the electromagnetic directional control valve 7b by exchanging spools 7c or 7e of the manual directional control valve 7a or the electromagnetic directional control valve 7b. Therefore, the operational manner of the forward/reverse directional control valve for the hydraulic oil supply line of a marine reversing gear assembly can be changed quite easily between the manual directional control valve and the electromagnetic directional control valve.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 6, 2006
    Inventors: Kazuyoshi Harada, Yoshiaki Terasawa, Naoyuki Oga, Hideo Misao