Patents by Inventor Masaaki Tachino

Masaaki Tachino 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 construction machine
    Patent number: 7634961
    Abstract: A hydraulic circuit including a first throttle disposed upstream of pressure-reducing valves of a remote-control valve, which operates a control valve of hydraulic pilot type, so as to reduce primary pressures supplied from a pilot pump to the pressure-reducing valves. Bleed-off lines connect pilot lines to tanks. Second throttles are disposed on the bleed-off lines, respectively, so as to moderate rises in the pilot pressures supplied to pilot ports of the control valve. The hydraulic circuit prevents detrimental effects such as deterioration of operability while ensuring shock absorption during quick operation.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: December 22, 2009
    Assignee: Kobelco Construction Machinery Co., Ltd.
    Inventors: Tomohiko Asakage, Yutaka Toji, Masaaki Tachino, Kazuhiko Fujii
  • Hydraulic Circuit for Construction Machine
    Publication number: 20070277883
    Abstract: A hydraulic circuit including a first throttle disposed upstream of pressure-reducing valves of a remote-control valve, which operates a control valve of hydraulic pilot type, so as to reduce primary pressures supplied from a pilot pump to the pressure-reducing valves. Bleed-off lines connect pilot lines to tanks. Second throttles are disposed on the bleed-off lines, respectively, so as to moderate rises in the pilot pressures supplied to pilot ports of the control valve. The hydraulic circuit prevents detrimental effects such as deterioration of operability while ensuring shock absorption during quick operation.
    Type: Application
    Filed: September 21, 2005
    Publication date: December 6, 2007
    Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Tomohiko Asakage, Yutaka Toji, Masaaki Tachino, Kazuhiko Fujii