Patents by Inventor Yasushi Matsunaga

Yasushi Matsunaga 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).

  • Double gear pump with improved bearings
    Patent number: 8672657
    Abstract: In a double gear pump that is provided with a drive gear; two driven gears that are oppositely arranged with the drive gear therebetween, a first bearing that supports a drive shaft of the drive gear; and a second and a third bearings that support rotating shafts of the two driven gears, the bearing length of the first bearing is formed shorter than the bearing lengths of the second and third bearings. According to the present invention, it is possible to provide a double gear pump that is capable of easily and reliably reducing the bearing loss of a bearing that support a gear.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: March 18, 2014
    Assignee: IHI Corporation
    Inventors: Seiei Masuda, Yasushi Matsunaga
  • DOUBLE GEAR PUMP
    Publication number: 20100247365
    Abstract: In a double gear pump that is provided with a drive gear; two driven gears that are oppositely arranged with the drive gear therebetween, a first bearing that supports a drive shaft of the drive gear; and a second and a third bearings that support rotating shafts of the two driven gears, the bearing length of the first bearing is formed shorter than the bearing lengths of the second and third bearings. According to the present invention, it is possible to provide a double gear pump that is capable of easily and reliably reducing the bearing loss of a bearing that support a gear.
    Type: Application
    Filed: August 15, 2007
    Publication date: September 30, 2010
    Inventors: Seiei Masuda, Yasushi Matsunaga
  • Three gear type gear pump of a fuel supply system
    Patent number: 7591640
    Abstract: A three-gear type gear pump or double gear pump wherein the first driven gear and the second driven gear are opposed to one another with the driving gear disposed between them, wherein the number of teeth of the driving gear is greater than the number of teeth of each of the first driven gear and the second driven gear.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: September 22, 2009
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Seiei Masuda, Yasushi Matsunaga
  • GEAR PUMP
    Publication number: 20080056926
    Abstract: A three-gear type gear pump or double gear pump wherein the first driven gear and the second driven gear are opposed to one another with the driving gear disposed between them, wherein the number of teeth of the driving gear is greater than the number of teeth of each of the first driven gear and the second driven gear.
    Type: Application
    Filed: August 30, 2006
    Publication date: March 6, 2008
    Inventors: Seiei MASUDA, Yasushi MATSUNAGA