Patents by Inventor Kiyoshi Narukawa

Kiyoshi Narukawa 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).

  • Publication number: 20030005821
    Abstract: A swash plate type compressor including; a rotary drive shaft having an axis of rotation; a swash plate supported by the drive shaft such that the swash plate is inclined or tiltable with respect to a plane perpendicular to the axis of rotation of the shaft; a housing which supports the drive shaft such that the drive shaft is rotatable and axially immovable relative to the housing, which has a plurality of cylinder bores which are located at respective circumferential portions radially spaced from the axis of rotation of the drive shaft and which extend in a direction parallel to the drive shaft; a plurality of pistons each including a head portion slidably engaging a corresponding one of the cylinder bores, and an engaging portion engaging a radially outer portion of opposite surfaces of the swash plate, each piston being reciprocated by the swash plate rotated with the drive shaft; and a plurality of shoes each of which is disposed between one of the opposite surfaces of the swash plate and the engaging po
    Type: Application
    Filed: May 20, 2002
    Publication date: January 9, 2003
    Inventors: Masaki Ota, Tomoji Tarutani, Hirotaka Kurakake, Osamu Hiramatsu, Kiyoshi Narukawa, Yoshinori Inoue
  • Publication number: 20020170425
    Abstract: A method of producing a shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor, the method comprising: a forming step of forming a steel blank into a shoe product including an end product shoe and a pre size-adjusted shoe; and a nitriding step of effecting a nitriding treatment on said shoe product; and wherein a quenching treatment is not effected after said forming step.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 21, 2002
    Inventors: Tomoji Tarutani, Tomohiro Wakita, Hirotaka Kurakake, Hidenori Iida, Naoki Usui, Masaki Ota, Osamu Hiramatsu, Kiyoshi Narukawa, Yoshinori Inoue
  • Publication number: 20020031433
    Abstract: Variable displacement compressor may include a swash plate inclinably coupled to a drive shaft. A piston may be disposed within a cylinder bore and an end portion of the piston may be connected to a peripheral edge of the swash plate by a shoe. The piston preferably reciprocates within the cylinder bore in order to compress a refrigerant in response to rotation of the inclined swash plate. The inclination angle of the swash plate can be changed to change the compressor output discharge capacity. A rotor is preferably coupled to the drive shaft so that the rotor rotates together with the rotating drive shaft. A hinge mechanism connects the swash plate with the rotor by means of a guide on a rotary disk of the rotor. The hinge mechanism transmits torque from the drive shaft to the swash plate regardless of the inclination angle of the swash plate.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 14, 2002
    Inventors: Takenori Sawa, Masahiro Kawaguchi, Masaki Ota, Osamu Hiramatsu, Hirohiko Tanaka, Naoki Usui, Yoshinori Inoue, Kiyoshi Narukawa, Tomoji Tarutani, Hidenori Iida