Patents by Inventor Ichiro Tsunaki

Ichiro Tsunaki 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: 20240393382
    Abstract: A contact detection apparatus includes an electrostatic sensor, and a determination processor detecting whether a conductor comes into contact with a plurality of detection regions. The determination processor includes a storage unit, a determination reference value setting unit, and a determination processing unit. The determination reference value setting unit determines a detection region in which a difference between a capacitance equivalent value and a setting reference value exceeds a threshold value as a contact region where the conductor is in contact, determines a detection region in which the difference is equal to or less than the threshold value as a non-contact region where the conductor is not in contact, and sets the setting reference value corresponding to the non-contact region as a determination reference value of the contact region for the contact region when determining that the contact region exists and that the non-contact region exists.
    Type: Application
    Filed: August 6, 2024
    Publication date: November 28, 2024
    Applicant: Sumitomo Riko Company Limited
    Inventors: Satoshi Yoshida, Takami Sugiyama, Ichiro Tsunaki, Takuma Maeda
  • Publication number: 20240393192
    Abstract: A contact detection device includes: an AC power supply switching between and applying first and second AC voltages to first and second electrode layers; a storage part storing an alternative quadrature component corresponding to a state in which a conductor is in contact with an electrostatic sensor; a quadrature component comparison part comparing between a first quadrature component extracted upon applying the first AC voltage to the second electrode layer and a second quadrature component extracted upon applying the second AC voltage to the second electrode layer; and a contact determination part that detects contact of a conductor based on the first quadrature component when the first quadrature component and the second quadrature component fall within a first quadrature error, and detects contact of a conductor based on the alternative quadrature component when the first quadrature component and the second quadrature component fall outside the first quadrature error.
    Type: Application
    Filed: August 6, 2024
    Publication date: November 28, 2024
    Applicant: Sumitomo Riko Company Limited
    Inventors: Takami Sugiyama, Satoshi Yoshida, Ichiro Tsunaki, Takuma Maeda
  • Patent number: 4483405
    Abstract: An omnidirectional motorized wheelchair having front wheels consisting of a pair of free wheels, and rear wheels consisting of motor-operated wheels driven by electric motors independently of each other. This wheelchair can be moved forward and backward, turned to right and left, and turned in a fixed position. The motor-operated wheels are moved pivotally in the opposite directions by a steering unit to set these wheels to face in the lateral direction with respect to the rider. Thus, the wheelchair can be moved in the lateral direction with the rider facing forward, and it can also be turned while it is moved in the lateral direction.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: November 20, 1984
    Assignee: Koyu Enterprise, Inc.
    Inventors: Takeo Noda, Ichiro Tsunaki