Patents by Inventor Ryuichiro Murakami

Ryuichiro Murakami 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).

  • Diesel engine
    Patent number: 10451015
    Abstract: A diesel engine including: a cam shaft driven by a crankshaft, a fuel injection pump driving cam provided on the cam shaft and configured to drive a fuel injection pump, and an intake cam provided on the cam shaft and configured to drive an intake valve. The fuel injection pump driving cam has a maximum radius portion, a minimum radius portion, an intermediate portion having a radius smaller than that of the maximum radius portion and larger than that of the minimum radius portion, and a slant portion where the intermediate portion shifts to the minimum radius portion in a reverse rotation direction of the driving cam. The position where the intermediate portion shifts to the slant portion begins after the intake valve is opened to an extent corresponding to at least half of a maximum lift of the intake valve.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 22, 2019
    Assignee: YANMAR CO., LTD.
    Inventors: Seiji Yukishige, Ryuichiro Murakami, Hiroyuki Nakagawa
  • Catalyst storage case, exhaust duct, and engine
    Patent number: 10113467
    Abstract: A catalyst storage case includes a case body having an exhaust passage; and first and second oxidation catalysts disposed in the exhaust passage of the case body. The first and second oxidation catalysts are arrayed in a direction intersecting a direction along which the exhaust passage extends.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: October 30, 2018
    Assignee: Yanmar Co., Ltd.
    Inventor: Ryuichiro Murakami
  • DIESEL ENGINE
    Publication number: 20180283335
    Abstract: A diesel engine including: a cam shaft (13) driven by a crankshaft, a fuel injection pump driving cam (14) provided on the cam shaft and configured to drive a fuel injection pump, and an intake cam (22) provided on the cam shaft and configured to drive an intake valve (31). The fuel injection pump driving cam (14) has a maximum radius portion (53), a minimum radius portion (51), an intermediate portion (55) having a radius smaller than that of the maximum radius portion and larger than that of the minimum radius portion, and a slant portion (56) where the intermediate portion shifts to the minimum radius portion in a reverse rotation direction of the driving cam. The position where the intermediate portion shifts to the slant portion begins after the intake valve is opened to an extent corresponding to at least half of a maximum lift of the intake valve.
    Type: Application
    Filed: September 26, 2016
    Publication date: October 4, 2018
    Applicant: Yanmar Co., Ltd.
    Inventors: Seiji YUKISHIGE, Ryuichiro MURAKAMI, Hiroyuki NAKAGAWA
  • Catalyst Storage Case, Exhaust Duct, and Engine
    Publication number: 20170002712
    Abstract: A catalyst storage case includes a case body having an exhaust passage; and first and second oxidation catalysts disposed in the exhaust passage of the case body. The first and second oxidation catalysts are arrayed in a direction intersecting a direction along which the exhaust passage extends.
    Type: Application
    Filed: January 8, 2015
    Publication date: January 5, 2017
    Applicant: Yanmar Co., Ltd.
    Inventor: Ryuichiro MURAKAMI
  • Exhaust gas purifier
    Patent number: D751119
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: March 8, 2016
    Assignee: YANMAR CO., LTD.
    Inventor: Ryuichiro Murakami