Patents by Inventor Yoshinobu Imasaka

Yoshinobu Imasaka 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).

  • Ultrasonic motor
    Patent number: 5311094
    Abstract: Provided herein is an ultrasonic motor in which at least fluorocarbon polymer is present on the contact surface of at least either of the rotor or the stator. Since the fluorocarbon polymer provides a smooth contact surface, the ultrasonic motor generates no noise and produces a stable starting torque and holding torque. In addition, it has a long life with a minimum of wear.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: May 10, 1994
    Assignee: Matsushita Electric Industrial Co., Inc.
    Inventors: Yoshinobu Imasaka, Hiroshi Yoneno, Masanori Sumihara
  • Ultrasonic motor
    Patent number: 5150000
    Abstract: Provided herein is an ultrasonic motor in which at least fluorocarbon polymer is present on the contact surface of at least either of the rotor of the stator. Since the fluorocarbon polymer provides a smooth contact surface, the ultrasonic motor generates no noise and produces a stable starting torque and holding torque. In addition, it has a long life with a minimum of wear.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: September 22, 1992
    Assignee: Matsushita Electric Industrial Co., LTD
    Inventors: Yoshinobu Imasaka, Hiroshi Yoneno, Masanori Sumihara
  • Ultrasonic motor
    Patent number: 5059849
    Abstract: In an ultrasonic motor using a friction member having arrangements of reinforcing fibers between an driven member to be driven and a vibrating stator for generating travelling waves by the vibration of a piezoelectric element, the arrangements of the fibers are oriented in at least a predetermined direciton, such as parallel to the moving direction of the driven member.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: October 22, 1991
    Assignee: Matsushita Electrical Industrial Co., Ltd.
    Inventors: Masanori Sumihara, Yoshinobu Imasaka, Hiroshi Yoneno
  • Ultrasonic motor
    Patent number: 4963781
    Abstract: In an ultrasonic motor using a friction member having arrangements of reinforcing fibers between an driven member to be driven and a vibrating stator for generating travelling waves by the vibration of a piezoelectric element, the arrangements of the fibers are oriented in at least a predetermined direction parallel or vertical to the moving direction such as of the driven member.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: October 16, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masanori Sumihara, Yoshinobu Imasaka, Hiroshi Yoneno
  • Ultrasonic motor
    Patent number: 4739212
    Abstract: A contacting member of a composite material of organic fiber and resin is provided to an inner surface of either a rotor or a stator of an ultrasonic motor. Noise is suppressed, starting torque is better and wear is decreased.
    Type: Grant
    Filed: July 17, 1986
    Date of Patent: April 19, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinobu Imasaka, Hiroshi Yoneno, Masanori Sumihara, Akira Tokushima