Patents by Inventor Youichi Kuwayama

Youichi Kuwayama 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).

  • Motor and turbo-molecular pump
    Patent number: 6815855
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor for rotating a rotor vane includes an air bearing. The air bearing has a rotary cylinder and a fixed surface surrounding the rotary cylinder. The material of the rotary cylinder has a coefficient of thermal expansion that is smaller than that of the material of the fixed surface. Thus, change in the dimensions of the rotary cylinder is smaller than that of the fixed surface even if the temperature of the air bearing rises during operation of the pump. Thus, the rotary cylinder avoids contact with the fixed surface.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: November 9, 2004
    Assignee: Ibiden Co., Ltd.
    Inventors: Hirokazu Yashiro, Youichi Kuwayama
  • Motor and pressure generating apparatus incorporating the motor
    Patent number: 6784580
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated integrally with the rotary shaft, and a fixed magnet, which is opposed to the rotated magnet. The rotated and fixed magnets repel each other. The diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that of the magnetic bearing at the basal end. This decreases movement of the rotary shaft toward its distal end when the pump operates.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: August 31, 2004
    Assignee: Ibiden Co., Ltd.
    Inventors: Hirokazu Yashiro, Youichi Kuwayama
  • Motor and turbo-molecular pump
    Publication number: 20040027019
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor for rotating a rotor vane includes an air bearing. The air bearing has a rotary cylinder and a fixed surface surrounding the rotary cylinder. The material of the rotary cylinder has a coefficient of thermal expansion that is smaller than that of the material of the fixed surface. Thus, change in the dimensions of the rotary cylinder is smaller than that of the fixed surface even if the temperature of the air bearing rises during operation of the pump. Thus, the rotary cylinder avoids contact with the fixed surface.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 12, 2004
    Applicant: Ibiden Co., Ltd.
    Inventors: Hirokazu Yashiro, Youichi Kuwayama
  • Motor and turbo-molecular pump
    Patent number: 6664683
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor for rotating a rotor vane includes an air bearing. The air bearing has a rotary cylinder and a fixed surface surrounding the rotary cylinder. The material of the rotary cylinder has a coefficient of thermal expansion that is smaller than that of the material of the fixed surface. Thus, change in the dimensions of the rotary cylinder is smaller than that of the fixed surface even if the temperature of the air bearing rises during operation of the pump. Thus, the rotary cylinder avoids contact with the fixed surface.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: December 16, 2003
    Assignee: Ibiden Co., LTD
    Inventors: Hirokazu Yashiro, Youichi Kuwayama
  • Motor and pressure generating apparatus incorporating the motor
    Publication number: 20030102748
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated integrally with the rotary shaft, and a fixed magnet, which is opposed to the rotated magnet. The rotated and fixed magnets repel each other. The diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that of the magnetic bearing at the basal end. This decreases movement of the rotary shaft toward its distal end when the pump operates.
    Type: Application
    Filed: November 5, 2002
    Publication date: June 5, 2003
    Applicant: Ibiden Co., Ltd.
    Inventors: Hirokazu Yashiro, Youichi Kuwayama
  • Motor and pressure generating apparatus incorporating the motor
    Patent number: 6498410
    Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated integrally with the rotary shaft, and a fixed magnet, which is opposed to the rotated magnet. The rotated and fixed magnets repel each other. The diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that of the magnetic bearing at the basal end. This decreases movement of the rotary shaft toward its distal end when the pump operates.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: December 24, 2002
    Assignee: Ibiden Co., Ltd.
    Inventors: Hirokazu Yashiro, Youichi Kuwayama