Patents by Inventor Yutaka Tukahara

Yutaka Tukahara 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).

  • Vibration damping system for vehicle
    Patent number: 5690321
    Abstract: A vibration damping system for a vehicle includes a vibration sensor which detects vibration of a predetermined vibrating element on the vehicle, a vibrator which vibrates the vibrating element, and a drive control unit which controls the vibrator on the basis of the detecting signal from the vibration sensor so that a predetermined object vibration component of the vibration of the vibrating element is damped by the vibration generated by the vibrator. The drive control unit is restrained from controlling the vibrator according to the condition of a predetermined factor of the vehicle.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 25, 1997
    Assignee: Mazda Motor Corporation
    Inventors: Hirofumi Seni, Norihiko Nakao, Chiaki Santo, Shin Takehara, Naoki Ikeda, Shingo Harada, Yutaka Tukahara
  • Vibration damping system for vehicle
    Patent number: 5651072
    Abstract: A vibration damping system for a vehicle includes a vibration sensor which detects vibration of a particular vibrating element, an actuator which applies vibration to the particular vibrating element and a controller which receives a vibration signal output from the vibration sensor and controls the actuator to apply to the particular vibrating element such vibration that damps the vibration detected by the vibration sensor. The controller is provided with a sensitivity changing circuit which changes the sensitivity of the vibration sensor according to a predetermined condition of the vehicle.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: July 22, 1997
    Assignee: Mazda Motor Corporation
    Inventors: Norihiko Nakao, Shin Takehara, Naoki Ikeda, Chiaki Santo, Hirofumi Seni, Shingo Harada, Yutaka Tukahara
  • Active vibration damping system for a vehicle
    Patent number: 5617315
    Abstract: A vibration damping system for a vehicle has a vibration sensor which detects vibration of solid elements on the vehicle and vibration of air inside the vehicle. A first vibrator supports a power unit relative to the vehicle body and directly vibrates the vehicle body. A second vibrator directly vibrates air inside the vehicle body. A drive control unit performs calculation on the basis of a detecting signal from the vibration sensor and controls the first and the second vibrators on the basis of the result of the calculation so that the vibration of the solid element and the vibration of air inside the vehicle body are damped. The vibrator control ratio of the first and second vibrators is changed according to the condition of a predetermined factor of the vehicle.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: April 1, 1997
    Assignee: Mazda Motor Corporation
    Inventors: Norihiko Nakao, Yutaka Tukahara, Naoki Ikeda, Shin Takehara, Hirofumi Seni, Shingo Harada, Chiaki Santo