Patents by Inventor Tokuyasu Kobaishi

Tokuyasu Kobaishi 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).

  • Controller for vane-type variable timing adjusting mechanism
    Patent number: 7845321
    Abstract: One-way valves (30, 31) are provided in a hydraulic supply passage (28) in an advance chamber (18) and a hydraulic supply passage (29) in a retard chamber (19) respectively for preventing reverse flow of oil from each chamber (18, 19) and drain oil passages (32, 33) bypassing the one-way valves respectively disposed in the hydraulic supply passages (28, 29) of the respective hydraulic chambers (18, 19) are provided to be in parallel therewith. Drain switching valves (34, 35) are disposed in the respective drain oil passages (32, 33). A hydraulic control valve (21) for controlling a hydraulic pressure supplied to the advance chamber (18) and the retard chamber (19) includes integrally a drain switching control function (38) for controlling a hydraulic pressure supplied to the respective drain switching valves (34, 35).
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: December 7, 2010
    Assignee: Denso Corporation
    Inventor: Tokuyasu Kobaishi
  • CONTROLLER FOR VANE-TYPE VARIABLE TIMING ADJUSTING MECHANISM
    Publication number: 20090151671
    Abstract: One-way valves (30, 31) are provided in a hydraulic supply passage (28) in an advance chamber (18) and a hydraulic supply passage (29) in a retard chamber (19) respectively for preventing reverse flow of oil from each chamber (18, 19) and drain oil passages (32, 33) bypassing the one-way valves respectively disposed in the hydraulic supply passages (28, 29) of the respective hydraulic chambers (18, 19) are provided to be in parallel therewith. Drain switching valves (34, 35) are disposed in the respective drain oil passages (32, 33). A hydraulic control valve (21) for controlling a hydraulic pressure supplied to the advance chamber (18) and the retard chamber (19) includes integrally a drain switching control function (38) for controlling a hydraulic pressure supplied to the respective drain switching valves (34, 35).
    Type: Application
    Filed: April 23, 2007
    Publication date: June 18, 2009
    Applicant: DENSO CORPORATION
    Inventor: Tokuyasu Kobaishi