Patents by Inventor Junichi Aizawa

Junichi Aizawa 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).

  • Spiral wound gasket and fabrication method thereof
    Patent number: 5082296
    Abstract: A spiral wound gasket is formed by winding combinedly and spirally a metal strip having at least one bend along its lateral direction and a belt-shaped filler in such a way that the metal strip and the filler are laminated together along their longitudinal direction and the filler protrudes from both lateral edges of the metal strip. The spiral wound gasket employs, as the filler, a flexible tape of carbon/carbon composites having a structure in which a carbon fiber, in the form of a bundle or string, is contained in the interior of an expanded graphite tape and the carbon fiber is located at the bend of the flexible tape formed when the laminate of the flexible tape and the metal strip in is wound. The spiral wound gasket is used as a pipe fitting etc. under high temperature and pressure conditions.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: January 21, 1992
    Assignee: extra-ministerial bureau of Ministry of International Trade and Industry, Japan Agency for Industrial Science and Technology
    Inventors: Junichi Aizawa, Yasushi Omata, Tatsuo Shimoyama, Kakuichi Kodama
  • Timepiece with mobile decorations
    Patent number: 5047998
    Abstract: A timepiece with mobile decorations comprises: a roof disposed over a case body having a timepiece unit built therein; driving means to make said roof up and down while turning the same in response to a signal from the said timepiece unit; and mobile decorations disposed inside of the roof to operate and become visible from the outside while the roof is in a raised position.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: September 10, 1991
    Assignee: Seikosha Co., Ltd.
    Inventors: Junichi Aizawa, Shoichiro Kumazawa, Tomohiro Wada
  • Method of spot welding parts of an electromagnetic bell unit
    Patent number: 4968971
    Abstract: A miniaturized electromagnetic bell unit suitable for use with an alarm clock and the like is provided.The bell unit of the present invention is characterized in that it is miniaturized in such a way that a yoke to which a coil and a bell hammer are attached is incorporated within a bell and the bell is fixed to the yoke.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: November 6, 1990
    Assignee: Seikosha Co., Ltd.
    Inventors: Junichi Aizawa, Satoru Yamauchi, Shoichiro Kumazawa, Natsuki Hashiba, Tomohiro Wada
  • Electromagnetic bell unit, its fitting structure and a method of welding the bell and the yoke of the unit
    Patent number: 4912453
    Abstract: A miniaturized electromagnetic bell unit suitable for use with an alarm clock and the like is provided.The bell unit of the present invention is characterized in that it is miniaturized in such a way that a yoke to which a coil and a bell hammer are attached is incorporated within a bell and the bell is fixed to the yoke.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: March 27, 1990
    Assignee: Seikosha Co., Ltd.
    Inventors: Junichi Aizawa, Satoru Yamauchi, Shoichiro Kumazawa, Natsuki Hashiba, Tomohiro Wada
  • Method of connecting coil
    Patent number: 4745682
    Abstract: A method of connecting a coil as mounted in an electric watch or clock in which a lead wire of the coil is made to cross a conductor near the terminal portion of the coil. The lead wire is drawn so as to traverse beyond a conductor to which it is to be attached, and the lead wire is anchored by an anchoring device so as to hold it against the conductor. The lead wire is then bonded to the conductor at the point of traverse.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: May 24, 1988
    Assignee: Seikosha Co,, Ltd.
    Inventors: Tsuyoshi Hayakawa, Isato Watanabe, Satoru Yamauchi, Isao Kondo, Junichi Aizawa
  • Electromagnetic bell
    Patent number: D304163
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: October 24, 1989
    Assignee: Seikosha Co., Ltd.
    Inventors: Junichi Aizawa, Shoichiro Kumazawa, Satoru Yamauchi, Isao Kondo
  • Clock movement
    Patent number: D323130
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: January 14, 1992
    Assignee: Seikosha Co., Ltd.
    Inventor: Junichi Aizawa