Patents by Inventor Isamu NARUSE

Isamu NARUSE 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 propulsion device
    Patent number: 8985084
    Abstract: A crankshaft includes a coupling portion, a first functional portion, and a second functional portion. The coupling portion is coupled to a connecting rod. The first functional portion is provided on an upper portion of the crankshaft protruding from a crankcase. The first functional portion drives a first functional component. The second functional portion is provided on a lower portion of the crankshaft protruding from the crankcase. The second functional portion drives a second functional component. The entire crankshaft has been processed by a first treatment to at least enhance the corrosion resistance thereof. At least a coupling portion of the crankshaft has been processed by a second treatment to at least enhance the strength thereof. Neither of the first functional portion and the second functional portion has been processed by the second treatment.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: March 24, 2015
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Makoto Kuroiwa, Isamu Naruse, Satoshi Miyazaki, Hirokazu Kaneko
  • MARINE PROPULSION DEVICE
    Publication number: 20140165934
    Abstract: A crankshaft includes a coupling portion, a first functional portion, and a second functional portion. The coupling portion is coupled to a connecting rod. The first functional portion is provided on an upper portion of the crankshaft protruding from a crankcase. The first functional portion drives a first functional component. The second functional portion is provided on a lower portion of the crankshaft protruding from the crankcase. The second functional portion drives a second functional component. The entire crankshaft has been processed by a first treatment to at least enhance the corrosion resistance thereof. At least a coupling portion of the crankshaft has been processed by a second treatment to at least enhance the strength thereof. Neither of the first functional portion and the second functional portion has been processed by the second treatment.
    Type: Application
    Filed: May 10, 2013
    Publication date: June 19, 2014
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Makoto KUROIWA, Isamu NARUSE, Satoshi MIYAZAKI, Hirokazu KANEKO