Patents by Inventor Aya Hamano

Aya Hamano 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).

  • Sintered plunger and production method therefor
    Patent number: 7541906
    Abstract: A sintered plunger is used for electromagnetic actuators. The sintered member includes: an outer member composed of a soft magnetic material and having an inner hole formed therein, and a shaft having an end portion which is fitted into the outer member. The shaft is composed of a ferromagnetic steel, the outer member peripheral is composed of a sintered member, and the shaft and the outer member are integrally bonded by sintering. As a result, the overall sintered plunger can have good magnetic properties, a good magnetic attraction, a good wear resistance, and a good fatigue strength. Electromagnetic actuators having high responsiveness required in recent years can be produced.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: June 2, 2009
    Assignees: Hitachi Powdered Metals Co., Ltd., Denso Corporation
    Inventors: Kazuo Asaka, Tsuyoshi Akao, Aya Hamano
  • Sintered plunger and production method therefor
    Publication number: 20070085644
    Abstract: A sintered plunger is used for electromagnetic actuators. The sintered member includes: an outer member composed of a soft magnetic material and having an inner hole formed therein, and a shaft having an end portion which is fitted into the outer member. The shaft is composed of a ferromagnetic steel, the outer member peripheral is composed of a sintered member, and the shaft and the outer member are integrally bonded by sintering. As a result, the overall sintered plunger can have good magnetic properties, a good magnetic attraction, a good wear resistance, and a good fatigue strength. Electromagnetic actuators having high responsiveness required in recent years can be produced.
    Type: Application
    Filed: September 15, 2004
    Publication date: April 19, 2007
    Applicants: HITACHI POWDERED METALS CO., LTD., DENSO CORPORATION
    Inventors: Kazuo Asaka, Tsuyoshi Akao, Aya Hamano