Patents by Inventor Akihiko Hemmi

Akihiko Hemmi 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).

  • Contact head, probe pin including the same, and electrical connector using the probe pin
    Patent number: 8591267
    Abstract: The contact head includes a head base, and at least two elastic contact pieces located on an upper end portion of the head base and configured to electrically contact a contact target object. A dent having a circular horizontal cross-sectional shape is formed at a central portion surrounded by the at least two elastic contact pieces. Additionally, each of the elastic contact pieces is formed with a tip end serving as a free end of the elastic contact piece located on a circumference of at least one virtual circle which is a circle concentric with an inscribed circle inscribed in a horizontal cross-sectional shape of the head base and which has a diameter being the same as or smaller than a diameter of the inscribed circle. Moreover, the contact piece is formed to be elastically deformable in a vertical direction by being formed to extend spirally.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: November 26, 2013
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventor: Akihiko Hemmi
  • CONTACT HEAD, PROBE PIN INCLUDING THE SAME, AND ELECTRICAL CONNECTOR USING THE PROBE PIN
    Publication number: 20120122355
    Abstract: The contact head includes a head base, and at least two elastic contact pieces located on an upper end portion of the head base and configured to electrically contact a contact target object. A dent having a circular horizontal cross-sectional shape is formed at a central portion surrounded by the at least two elastic contact pieces. Additionally, each of the elastic contact pieces is formed with a tip end serving as a free end of the elastic contact piece located on a circumference of at least one virtual circle which is a circle concentric with an inscribed circle inscribed in a horizontal cross-sectional shape of the head base and which has a diameter being the same as or smaller than a diameter of the inscribed circle. Moreover, the contact piece is formed to be elastically deformable in a vertical direction by being formed to extend spirally.
    Type: Application
    Filed: March 25, 2011
    Publication date: May 17, 2012
    Applicant: YAMAICHI ELECTRONICS CO., LTD.
    Inventor: Akihiko Hemmi