Patents by Inventor Motoki Oba

Motoki Oba 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).

  • Hydraulic circuit for working vehicle
    Patent number: 6321535
    Abstract: A hydraulic circuit for a loader vehicle includes a working machine hydraulic circuit, a steering hydraulic circuit, a variable displacement auxiliary hydraulic pump, in which the displacement volume becomes smaller as the operating oil pressure becomes higher, when the operating oil pressure exceeds a predetermined oil pressure by receiving the operating oil pressure of the working machine hydraulic circuit, and a flow dividing valve for switching and supplying oil discharge from the auxiliary hydraulic pump to either one of the hydraulic circuits with a priority being given to the steering hydraulic circuit. A pump capacity control device includes a working machine hydraulic actuator, a working machine hydraulic pump, a steering pump, a steering pump capacity servo, a working machine load sensor, and an engine speed sensor.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: November 27, 2001
    Assignee: Komatsu Ltd.
    Inventors: Masanori Ikari, Motoki Oba
  • Hydraulic circuit for working vehicle
    Publication number: 20010008068
    Abstract: A hydraulic circuit for a loader vehicle includes: a working machine hydraulic circuit (10); a steering hydraulic circuit (20); a variable displacement auxiliary hydraulic pump (50A), in which the displacement volume (Vs) becomes smaller as the operating oil pressure becomes higher, when the operating oil pressure exceeds a predetermined oil pressure by receiving the operating oil pressure of the working machine hydraulic circuit (10); a flow dividing valve (60), for switching and supplying oil discharge (Qs) from the auxiliary hydraulic pump to either one of the hydraulic circuits (10, 20), with a priority being given to the steering hydraulic circuit (20). One pump capacity control device includes a working machine hydraulic actuator (201); a working machine hydraulic pump (202); a working machine pump capacity control means (205); a working machine load detecting means (206a); and an engine speed detecting means (207).
    Type: Application
    Filed: February 23, 2001
    Publication date: July 19, 2001
    Applicant: KOMATSU LTD.
    Inventors: Masanori Ikari, Motoki Oba