Patents by Inventor Koichi Tamatsu

Koichi Tamatsu 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).

  • Hollow stabilizer and method of manufacturing the same
    Patent number: 7896983
    Abstract: In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: March 1, 2011
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hiroshi Koyama, Koichi Tamatsu, Masato Sugawara, Jun Umeno, Hiroshi Machida, Hiroshi Masuya, Fumiaki Kimura, Yasuaki Tsuji, Akihiro Katsuya, Takahiro Nakamura
  • Hollow stabilizer and method of manufacturing the same
    Publication number: 20060200990
    Abstract: In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.
    Type: Application
    Filed: May 9, 2006
    Publication date: September 14, 2006
    Inventors: Hiroshi Koyama, Koichi Tamatsu, Masato Sugawara, Jun Umeno, Hiroshi Machida, Hiroshi Masuya, Fumiaki Kimura, Yasuaki Tsuji, Akihiro Katsuya, Takahiro Nakamura
  • Hollow stabilizer
    Patent number: 6871865
    Abstract: A hollow stabilizer made of a steel pipe, comprises: a torsion portion extending in a width direction of a vehicle body; a pair of right and left arm portions positioned at both end sides of the torsion portion; and a plurality of curved portions which are bent in an arc shape in any of the torsion portion, the arm portions and portions therebetween. Bending radii of the plurality of curved portions are different from each other.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: March 29, 2005
    Assignee: NHK Spring Co., Ltd.
    Inventors: Tsutomu Furuyama, Hiroshi Koyama, Yoshihiro Koshita, Jun Umeno, Koichi Tamatsu
  • Ball joint and assembling method therefor
    Patent number: 6736565
    Abstract: A ball joint comprises: a ball stud having a spherical head at an end thereof; a ball seat into which the spherical head is slidably fitted so as to universally support the ball stud; and a housing for accommodating the ball seat. The ball seat and the housing have surfaces opposing each other, and recesses communicated with each other are formed on the surfaces. The recesses are filled with a resin, so that relative movement of the ball seat with respect to the housing is restricted.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: May 18, 2004
    Assignees: NHK Spring Co., Ltd., Beyonz Corp.
    Inventors: Koichi Tamatsu, Tadayuki Kojima, Mitsuhiro Dekune
  • Hollow stabilizer
    Publication number: 20030075895
    Abstract: A hollow stabilizer made of a steel pipe, comprises: a torsion portion extending in a width direction of a vehicle body; a pair of right and left arm portions positioned at both end sides of the torsion portion; and a plurality of curved portions which are bent in an arc shape in any of the torsion portion, the arm portions and portions therebetween. Bending radii of the plurality of curved portions are different from each other.
    Type: Application
    Filed: October 22, 2002
    Publication date: April 24, 2003
    Inventors: Tsutomu Furuyama, Hiroshi Koyama, Yoshihiro Koshita, Jun Umeno, Koichi Tamatsu
  • Ball joint and assembling method therefor
    Publication number: 20030049072
    Abstract: A ball joint comprises: a ball stud having a spherical head at an end thereof; a ball seat into which the spherical head is slidably fitted so as to universally support the ball stud; and a housing for accommodating the ball seat. The ball seat and the housing have surfaces opposing each other, and recesses communicated with each other are formed on the surfaces. The recesses are filled with a resin, so that relative movement of the ball seat with respect to the housing is restricted.
    Type: Application
    Filed: September 11, 2001
    Publication date: March 13, 2003
    Inventors: Koichi Tamatsu, Tadayuki Kojima, Mitsuhiro Dekune
  • Hollow stabilizer and method of manufacturing the same
    Publication number: 20020170177
    Abstract: In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.
    Type: Application
    Filed: March 7, 2002
    Publication date: November 21, 2002
    Inventors: Hiroshi Koyama, Koichi Tamatsu, Masato Sugawara, Jun Umeno, Hiroshi Machida, Hiroshi Masuya, Fumiaki Kimura, Yasuaki Tsuji, Akihiro Katsuya, Takahiro Nakamura