Patents by Inventor Fumihide Kozuma

Fumihide Kozuma 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).

  • Power steering
    Patent number: 6675928
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: January 13, 2004
    Assignee: Kayaba Industry Company, Ltd.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Power steering
    Publication number: 20030029667
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Application
    Filed: October 4, 2002
    Publication date: February 13, 2003
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Power steering
    Patent number: 6499557
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: December 31, 2002
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Power steering
    Patent number: 6484841
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: November 26, 2002
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Power steering
    Publication number: 20020074183
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Application
    Filed: February 21, 2002
    Publication date: June 20, 2002
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Power steering
    Publication number: 20010004953
    Abstract: For an energy-saving type control, a value of a control low rate QP controlled by a flow control valve V is closer to a value of a flow rate required by an output side such as a power cylinder 8, a steering valve 9 or the like, to suppress a driving torque of a pump P. An excitation current I of a solenoid SOL is specified on the basis of a solenoid current instruction value IT based on a steering torque and a solenoid current instruction value IS defining a standby flow rate.
    Type: Application
    Filed: December 12, 2000
    Publication date: June 28, 2001
    Applicant: Kayaba Industry Co., Ltd.
    Inventors: Masashi Takai, Naoto Shima, Fumihide Kozuma, Norimasa Amano, Noboru Shimizu
  • Vibration damping equipment
    Patent number: 5666770
    Abstract: A mass supported on a structure is driven by an actuator such that it moves in a direction of a vibration of the structure. A mechanism for detecting state variables relating to the vibration of the structure and a Kalman filter for performing a predetermined calculation processing on the state variables by comparing with a structure model included therein are provided in order to estimate proper values of state variables. From these state quantifies, control input values are calculated based on an optimal feedback gain matrix preset on the basis of an optimal regulator theory, and applied to control the actuator. With this configuration, the vibration of the mass due to a high-order vibration mode of the structure and the vibration of the mass caused by the compressibility of a hydraulic oil or the response characteristics of a servo valve are efficiently suppressed.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: September 16, 1997
    Assignee: Kayaba Kogyo Kabushiki Kaisha
    Inventors: Kosuke Sato, Nobuyoshi Haniuda, Fumihide Kozuma