Patents by Inventor Kazuhiro Matsukawa

Kazuhiro Matsukawa 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: 7069947
    Abstract: A fluid control valve includes a valve body, an annular groove portion formed in an outer periphery of the valve body, a filter provided in the groove portion. The filter includes a plate with a plural of perforations and formed into a cylindrical shape. The filter further includes a snap ring formed from a thin bar bent into a loop. Both ends of the snap ring extending in an axial direction and freely contacting with opposed side surfaces defining the groove portion.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: July 4, 2006
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazuhiko Maeda, Shigeki Niimi, Kazuhiro Matsukawa, Hiroshi Isogai
  • Publication number: 20040182450
    Abstract: A fluid control valve includes a valve body, an annular groove portion formed in an outer periphery of the valve body, a filter provided in the groove portion. The filter includes a plate with a plural of perforations and formed into a cylindrical shape. The filter further includes a snap ring formed from a thin bar bent into a loop. Both ends of the snap ring extending in an axial direction and freely contacting with opposed side surfaces defining the groove portion.
    Type: Application
    Filed: February 25, 2004
    Publication date: September 23, 2004
    Inventors: Kazuhiko Maeda, Shigeki Niimi, Kazuhiro Matsukawa, Hiroshi Isogai
  • Patent number: 6527249
    Abstract: An electromagnetic valve comprises a case having a cylindrical portion, a yoke having a large diameter portion and a small diameter portion, and a sleeve having at least two ports and receiving a valve member therein so as to perform reciprocating motion. The large diameter portion of the yoke is fluid-tightly pressed into the inner circumferential surface of the cylindrical portion of the case, and the inner circumferential surface of the sleeve is fluid-tightly pressed onto the outer circumferential surface of the small diameter portion of the yoke.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: March 4, 2003
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Shigeki Niimi, Masahiro Yoshida, Kazuhiro Matsukawa
  • Publication number: 20010052584
    Abstract: An electromagnetic valve compromises a case having a cylindrical portion, a yoke having a large diameter portion and a small diameter portion, and a sleeve having at least two ports and receiving a valve member therein so as to perform reciprocating motion. The large diameter portion of the yoke is fluid-tightly pressed into the inner circumferential surface of the cylindrical portion of the case, and the inner circumferential surface of the sleeve is fluid-tightly pressed onto the outer circumferential surface of the small diameter portion of the yoke.
    Type: Application
    Filed: May 25, 2001
    Publication date: December 20, 2001
    Inventors: Shigeki Niimi, Masahiro Yoshida, Kazuhiro Matsukawa
  • Patent number: 5045736
    Abstract: An actuator end cap is provided for an actuator having a housing and a cover connected together and defining a joint therebetween. The end cap has a skirt portion disposed in overlying relation to the joint to provide a fluid-tight seal for the joint. A breather hole is formed in the side of the cover and a semi-cylindrical groove is formed on the inner surface of the skirt of the end cap. One end of the groove is disposed in communication with the breather hole in the cover and the other end of the groove is in communication with a vent hole extending outwardly through the end cap.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: September 3, 1991
    Assignee: Aisin Seiki K.K.
    Inventors: Hiroyuki Amano, Kouji Hirao, Shinichiro Iwasaki, Kazuhiro Matsukawa, Hiroyuki Takagi