Patents by Inventor Ryousuke Kumagai

Ryousuke Kumagai 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).

  • Publication number: 20240151003
    Abstract: A controller of a work machine computes a requested velocity of a hydraulic actuator based on an operation signal, computes a first estimated velocity of the hydraulic actuator based on a sensed value of a first sensing device that senses motion information of a driven member, computes a second estimated velocity of the hydraulic actuator based on a sensed value of a second sensing device that senses a flow rate of a directional control valve, computes an arbitrated velocity by arbitrating the first estimated velocity and the second estimated velocity according to a driving state of the hydraulic actuator, and controls the directional control valve based on a deviation between the requested velocity and the arbitrated velocity.
    Type: Application
    Filed: March 11, 2022
    Publication date: May 9, 2024
    Inventors: Naoya TAKAGAWA, Kento KUMAGAI, Mitsuhiko KANEHAMA, Hiroaki AMANO, Ryousuke ITOU
  • Patent number: 7426087
    Abstract: An information recording apparatus has a write canceling circuit that monitors interface signals fed from a host and that, when the interface signals are recognized to be abnormal, inhibits write operation against a recording medium either for a predetermined period or until a predetermined condition is fulfilled. This circuit configuration helps eliminate or reduce the occurrence of erroneous write operation as occurs when the received interface signals are abnormal.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: September 16, 2008
    Assignee: Rohm Co., Ltd.
    Inventors: Akio Fujikawa, Ryousuke Kumagai
  • Publication number: 20060119967
    Abstract: An information recording apparatus has a write canceling circuit that monitors interface signals fed from a host and that, when the interface signals are recognized to be abnormal, inhibits write operation against a recording medium either for a predetermined period or until a predetermined condition is fulfilled. This circuit configuration helps eliminate or reduce the occurrence of erroneous write operation as occurs when the received interface signals are abnormal.
    Type: Application
    Filed: January 20, 2006
    Publication date: June 8, 2006
    Inventors: Akio Fujikawa, Ryousuke Kumagai
  • Publication number: 20060119966
    Abstract: An information recording apparatus has a write canceling circuit that monitors interface signals fed from a host and that, when the interface signals are recognized to be abnormal, inhibits write operation against a recording medium either for a predetermined period or until a predetermined condition is fulfilled. This circuit configuration helps eliminate or reduce the occurrence of erroneous write operation as occurs when the received interface signals are abnormal.
    Type: Application
    Filed: January 20, 2006
    Publication date: June 8, 2006
    Inventors: Akio Fujikawa, Ryousuke Kumagai
  • Patent number: 7019929
    Abstract: An information recording apparatus has a write canceling circuit that monitors interface signals fed from a host and that, when the interface signals are recognized to be abnormal, inhibits write operation against a recording medium either for a predetermined period or until a predetermined condition is fulfilled. This circuit configuration helps eliminate or reduce the occurrence of erroneous write operation as occurs when the received interface signals are abnormal.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: March 28, 2006
    Assignee: Rohm Co., Ltd.
    Inventors: Akio Fujikawa, Ryousuke Kumagai
  • Publication number: 20020159181
    Abstract: An information recording apparatus has a write canceling circuit that monitors interface signals fed from a host and that, when the interface signals are recognized to be abnormal, inhibits write operation against a recording medium either for a predetermined period or until a predetermined condition is fulfilled. This circuit configuration helps eliminate or reduce the occurrence of erroneous write operation as occurs when the received interface signals are abnormal.
    Type: Application
    Filed: April 17, 2002
    Publication date: October 31, 2002
    Inventors: Akio Fujikawa, Ryousuke Kumagai