Patents by Inventor Tatsuo Ikeda

Tatsuo Ikeda 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).

  • Patent number: 6005329
    Abstract: The case of a piezoelectric resonator in which a piezoelectric vibrator having a piezoelectric body and an electrode is flattened and a guard is provided protruding by the amount about the same as the thickness of the case on the hermetic terminal so that the open edge is received by insertion. Then the hermetic terminal in which one end of the piezoelectric vibrator is supported by the inner lead is inserted in the open edge of the case and the case is sealed by laser welding the welding area extending to the guard and to the open edge. By so doing, a thin piezoelectric resonator is provided which is desirable for surface mounting and being capable of maintaining the inside of the case in a stable vacuum state or sealed with nitrogen and the like for a long time. Moreover, by supporting the piezoelectric vibrator by the flattened inner lead inside the air tight case, a piezoelectric resonator is provided which has excellent frequency characteristics and long term aging characteristics.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: December 21, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Eiji Karaki, Takuo Kuwahara
  • Patent number: 5736710
    Abstract: The case of a piezoelectric resonator in which a piezoelectric oscillator piece having a piezoelectric body and an electrode is flattened and a guard is provided protruding by the amount about the same as the thickness of the case on the hermetic terminal so that the open edge is received by insertion. Then the hermetic terminal in which one end of the piezoelectric oscillator piece is supported by the inner lead is inserted in the open edge of the case and the case is sealed by laser welding the welding area extending to the guard and to the open edge. By so doing, a thin piezoelectric resonator is provided which is ideal for surface mounting and being capable of maintaining the inside of the case in a stable vacuum state or sealed with nitrogen and the like for a long time.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: April 7, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Eiji Karaki, Takuo Kuwahara
  • Patent number: 5592130
    Abstract: A resin mold type piezoelectric oscillator is provided comprising a piezoelectric oscillator having outer leads, a semiconductor integrated circuit for electrically oscillating the piezoelectric oscillator, and a lead frame formed substantially in a plane for mounting the piezoelectric oscillator and integrated circuit the lead frame having connection pads for connecting to the outer leads of the piezoelectric oscillator. The outer leads of the piezoelectric oscillator are bent at least twice in a plane substantially perpendicular to the lead frame so as to provide a clearance for crossing over inner leads of the lead frame.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 7, 1997
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Hiroyuki Ogiso, Kazushige Ichinose
  • Patent number: 5541557
    Abstract: A piezoelectric resonator is formed with a case and a stem for housing the piezoelectric vibrating portion thereof. The case and stem are coupled by press-fitting and the interface is coated with a high temperature solder containing at least 90% lead. An inner lead of the resonator is also coated with the solder and a portion of the vibrator is fixed to the lead by melting the solder. Alternative constructions employ a resin case or a metallic plate case and a configuration in which an integrated circuit and a piezoelectric vibrator are integrally molded to achieve a highly desirable mounting configuration.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 30, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Hiroyuki Ogiso, Kazushige Ichinose
  • Patent number: 5504460
    Abstract: A piezoelectric resonator is formed with a case and a stem for housing the piezoelectric vibrating portion thereof. The case and stem are coupled by press-fitting and the interface is coated with a high temperature solder containing at least 90% lead. An inner lead of the resonator is also coated with the solder and a portion of the vibrator is fixed to the lead by melting the solder. Alternative constructions employ a resin case or a metallic plate case and a configuration in which an integrated circuit and a piezoelectric vibrator are integrally molded to achieve a highly desirable mounting configuration.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: April 2, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Hiroyuki Ogiso, Kazushige Ichinose
  • Patent number: 5392006
    Abstract: A piezoelectric resonator is formed with a case and a stem for housing the piezoelectric vibrating portion thereof. The case and stem are coupled by press-fitting and the interface is coated with a high temperature solder containing at least 90% lead. An inner lead of the resonator is also coated with the solder and a portion of the vibrator is fixed to the lead by melting the solder. Alternative constructions employ a resin case or a metallic plate case and a configuration in which an integrated circuit and a piezoelectric vibrator are integrally molded to achieve a highly desirable mounting configuration.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: February 21, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Hiroyuki Ogiso, Kazushige Ichinose
  • Patent number: 5265316
    Abstract: The invention relates to a piezoelectric oscillator wherein a case and a stem are coated with a solder containing 90% and higher of lead, an inner lead is also coated with the solder thereby fixing a piece of piezoelectric oscillator by melting the solder. The invention further relates to a piezoelectric oscillator wherein the piezoelectric oscillator is performed casing by resin or metallic plate, and to a piezoelectric oscillating apparatus wherein IC and a piezoelectric oscillator are internally mold to achieve a molding of high efficiency without inferiority while surface mounting.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: November 30, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Ikeda, Hiroyuki Ogiso, Kazushige Ichinose
  • Patent number: 4378099
    Abstract: An outer escutcheon fixing structure for car stereo etc. which is characterized by channel-shaped fixing members fitted to the front face of an escutcheon body for a car stereo etc. through an instrument panel of a car and horizontal members on an outer escutcheon member defining spaces for receiving tip ends of the respective channel-shaped fixing members. Either the channel-shaped fixing members or the horizontal members are imparted with resiliency in the vertical direction, so that the channel-shaped fixing members are resiliently engaged with the horizontal members to fix the outer escutcheon member.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: March 29, 1983
    Assignee: Clarion Co., Ltd.
    Inventors: Tatsuo Ikeda, Shoji Ariga