Patents by Inventor Satoru Oikawa

Satoru Oikawa 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: 10562559
    Abstract: Rack bar 10 for transmitting a steering operation to steered wheels while converting a rotational movement of a pinion shaft rotatably connected to a steering wheel into an axial movement, the rack bar being formed by conducting a die forging process on a material having an approximately circular cross section. A pair of face width-enlarged portions 15 is provided at both ends that rack teeth 14 have in face width direction. With this, it becomes possible to ensure face width dimension W of rack teeth 14 larger than outer shape S of a circular cross section of rack main body 13 (material), which results in an improvement of a contact gear ratio between the pinion teeth and the rack teeth.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: February 18, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Satoru Oikawa, Shuuji Nakasuka, Shinichi Yamanaka
  • Publication number: 20170225703
    Abstract: Rack bar 10 for transmitting a steering operation to steered wheels while converting a rotational movement of a pinion shaft rotatably connected to a steering wheel into an axial movement, the rack bar being formed by conducting a die forging process on a material having an approximately circular cross section. A pair of face width-enlarged portions 15 is provided at both ends that rack teeth 14 have in face width direction. With this, it becomes possible to ensure face width dimension W of rack teeth 14 larger than outer shape S of a circular cross section of rack main body 13 (material), which results in an improvement of a contact gear ratio between the pinion teeth and the rack teeth.
    Type: Application
    Filed: May 25, 2015
    Publication date: August 10, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Satoru OIKAWA, Shuuji NAKASUKA, Shinichi YAMANAKA
  • Patent number: 6146775
    Abstract: A magnetoresistive film is disclosed which has a layered structure comprising a first ferromagnetic layer, a second ferromagnetic layer, a nonmagnetic conductive layer interposed between the first and second ferromagnetic layers, and an antiferromagnetic layer coupled with one of the first and second ferromagnetic layers. The antiferromagnetic layer comprises an antiferromagnetic material selected from an antimony-base alloy, fluoride, an FeRh-base alloy, FeS, an IrMnCo-base alloy and a CrAl-base alloy.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: November 14, 2000
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masayuki Fujita, Atsushi Maeda, Satoru Oikawa, Koji Yamano, Minoru Kume
  • Patent number: 5955211
    Abstract: Disclosed is a magnetoresistive film which includes an antiferromagnetic layer, a first amorphous ferromagnetic layer, a crystalline ferromagnetic interlayer disposed between the antiferromagnetic layer and the first amorphous ferromagnetic layer, a nonmagnetic conductive layer provided on the first amorphous ferromagnetic layer and a ferromagnetic layer provided on the nonmagnetic conductive layer.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: September 21, 1999
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Maeda, Satoru Oikawa
  • Patent number: 5818323
    Abstract: A magnetoresistive device has an alloy film, including a ferromagnetic substance and a non-magnetic substance which is not soluble in solid phase in the ferromagnetic substance or is in a eutectic relation with the ferromagentic substance. The ferromagnetic substance forms grains in the non-magnetic substance, and the grains preferably have anisotropic shapes. The non-magnetic substance is conducting. The alloy film is composed of a plurality of alloy film stripes. Alternatively the magneto-resistive device includes a non-magnetic layer arranged between first and second magnetic layers, wherein the non-magnetic layer has 10 to 50 weight percent of grains of a magnetic substance dispersed therein.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: October 6, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Maeda, Satoru Oikawa, Toshio Tanuma, Minoru Kume, Kazuhiko Kuroki
  • Patent number: 5738929
    Abstract: A magnetoresistance effect element includes a non-magnetic substrate, a ferromagnetic dispersion layer or a ferromagnetic layer, and a non-magnetic metal film. The ferromagnetic dispersion layer is a layer of a ferromagnetic metal or alloy that is independently and dispersedly formed on the substrate. The alternative ferromagnetic layer is a layer of a ferromagnetic metal or alloy that is formed on the substrate with a textured surface. The non-magnetic metal film is made of at least one atomic element having a non-soluble relation with the ferromagnetic metal or alloy, and is formed on the non-magnetic substrate and the ferromagnetic dispersion layer or the ferromagnetic layer.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: April 14, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Maeda, Satoru Oikawa, Minoru Kume
  • Patent number: 5736921
    Abstract: A magnetoresistive element includes a substrate, a magnetoresistive film arranged on the substrate and prepared from a non-magnetic conductive metal film containing grains consisting of a ferromagnetic metal atom or a ferromagnetic metal alloy dispersed therein so that the grain concentration is varied along the film thickness direction, a pair of current feeding electrodes arranged on the magnetoresistive film, and a pair of voltage reading electrodes arranged on the magnetoresistive film.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: April 7, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Maeda, Satoru Oikawa, Minoru Kume
  • Patent number: 5585198
    Abstract: A magnetoresistance effect element includes a non-magnetic substrate, a ferromagnetic dispersion layer or a ferromagnetic layer, and a non-magnetic metal film. The ferromagnetic dispersion layer is a layer of a ferromagnetic metal or alloy that is independently and dispersedly formed on the substrate. The alternative ferromagnetic layer is a layer of a ferromagnetic metal or alloy that is formed on the substrate with a textured surface. The non-magnetic metal film is made of at least one atomic element having a non-soluble relation with the ferromagnetic metal or alloy, and is formed on the non-magnetic substrate and the ferromagnetic dispersion layer or the ferromagnetic layer.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: December 17, 1996
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Maeda, Satoru Oikawa, Minoru Kume
  • Patent number: 5240389
    Abstract: In a scroll type compressor, a revolving scroll having a disc portion and a blade portion is engaged with a stationary scroll having a disc portion and a blade portion. A gas is introduced from the outer peripheral portions of these scrolls and compressed in a pair of compression chambers defined between the scrolls, and a compressed gas is discharged. A first inlet and a second inlet, which are connected by a communication path, are formed at positions corresponding to the compression chambers, where the gas is compressed. Release means is provided between one of the compression chambers and a gas suction unit. The release means returns part of the gas in one of the compression chambers directly to, and part of the gas in the other compression chamber via the first and second inlets, the communication path and the one of the compression chambers to, the gas suction unit simultaneously by equal degrees.
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: August 31, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoru Oikawa, Toshinobu Inoue, Akira Morishima, Yutaka Sasahara
  • Patent number: 5174737
    Abstract: Disclosed is a fluid compressor which comprises a closed case having an inlet for a fluid at one end thereof and an outlet for a fluid at the other, a cylinder fixed in the case, and a rotary member which orbits in and relatively to the cylinder, wherein the rotary member has a compression unit for compressing a fluid supplied into the closed case from the inlet thereof on the orbit movement of the rotary member, then discharging it outside from the outlet of the closed case.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: December 29, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hirotsugu Sakata, Tsugio Itami, Masayuki Okuda, Takuya Hirayama, Satoru Oikawa
  • Patent number: 5080566
    Abstract: A fluid scroll machine comprises a fluid mechanism including first and second spiral blades located in a frame to eccentrically rotate and a compression chamber defined by the spiral blades, and an Oldham's coupling movably supported by the frame and including a ring-shaped plate having one side facing the first spiral blade and an axis center, a pair of first projections projected from the one side of the ring-shaped plate, and a pair of second projections projected from the one side of the ring-shaped plate. The first spiral blade includes a pair of first guide passages extended in a same direction as a first radial direction of the ring-shaped plate and into which the first projections are fitted to slide in a first radial direction of the plate. The second spiral blade includes a pair of second guide passages extended in a same direction as a second radial direction of the ring-shaped plate and into which the second projections are fitted to slide in the second radial direction of the plate.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: January 14, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hirotsugu Sakata, Toshinobu Inoue, Satoru Oikawa
  • Patent number: 5040952
    Abstract: A scroll-type compressor includes a hermetic case in which a compression section having a pair of spiral scrolls and a motor section for driving the compression section are arranged. The motor section has a rotating shaft coupled to the compression section. A flow passage is formed in the shaft and communicates at its one end with the compression chamber of the compression section and at its other end with a muffler chamber defined above the motor section. An operating fluid compressed in the compression chamber is guided into the muffler chamber through the flow passage, flows around the motor section, and then is discharged from the case.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: August 20, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinobu Inoue, Satoru Oikawa, Katutoshi Kumashiro, Hirotsugu Sakata