Patents by Inventor Masuhiro Kondoh

Masuhiro Kondoh 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).

  • Solenoid valve
    Patent number: 8936040
    Abstract: A solenoid valve has a tapered valve seat disposed between a first flow passage and a second flow passage, a reduced diameter side of the valve seat that is connected with the first flow passage, and a valve body having a closing portion that reduces its diameter toward a tip facing the valve seat. The first flow passage and the second flow passage are connected/disconnected by sliding the valve body for contacting/detaching the closing portion to the valve seat, and a groove is disposed on the closing portion facing the direction of a fluid flow.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: January 20, 2015
    Assignees: Denso Corporation, Nippon Soken, Inc., Advics Co, Ltd.
    Inventors: Motonori Tominaga, Masuhiro Kondoh, Shinichi Tsujimura, Yoshitada Katayama
  • Solenoid valve
    Publication number: 20120001107
    Abstract: A solenoid valve has a tapered valve seat disposed between a first flow passage and a second flow passage, a reduced diameter side of the valve seat that is connected with the first flow passage, and a valve body having a closing portion that reduces its diameter toward a tip facing the valve seat. The first flow passage and the second flow passage are connected/disconnected by sliding the valve body for contacting/detaching the closing portion to the valve seat, and a groove is disposed on the closing portion facing the direction of a fluid flow.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 5, 2012
    Applicants: Nippon Soken, Inc., Advics Co., Ltd., DENSO CORPORATION
    Inventors: Motonori Tominaga, Masuhiro Kondoh, Shinichi Tsujimura, Yoshitada Katayama
  • Solenoid valve with ball attracted towards seating because of negative pressure
    Patent number: 5556175
    Abstract: When oil flows from within a seat valve along an oil path in a valve, structure is such that a negative pressure is generated to draw a ball in the direction of the seat valve. That is, the force in the direction of valve closure is actively utilized, the valve does not perform a full stroke in a certain differential pressure range, and increases in a pulsed manner in a minute-stroke state, i.e., in a state where the passage cross-sectional area of the valve is small. Therefore, effective control becomes possible without a large pressure increase.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: September 17, 1996
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hideyuki Hayakawa, Masuhiro Kondoh, Makoto Imaeda, Yuzo Imoto, Kenji Takeda