Patents by Inventor Hiroshi Shirataki

Hiroshi Shirataki 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: 10422392
    Abstract: A one-way clutch 1 includes: an inner race 3; an outer race 5; a plurality of cams 7 interposed between an inner race outer peripheral surface 11 and an outer race inner peripheral surface 13 and serving to transfer a torque to between the inner race 3 and the outer race 5; a retaining mechanism retaining the plurality of cams 7; and a spring member 15 biasing the plurality of cams 7 to torque non-transfer positions, and the retaining mechanism includes a first retainer 9 fixed to the outer race 5 and having a cylindrical retaining portion 21 retaining the plurality of cams 7 at a predetermined interval in a circumferential direction, and a second retainer 29 disposed on an inner diametrical side of the cylindrical retaining portion 21, retaining the plurality of cams 7 in a swingable manner, and elastically deformable corresponding to the swings of the plurality of cams 7 when swinging in a torque transferring direction upon engagements of the plurality of cams 7 with the inner race outer peripheral surface
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: September 24, 2019
    Assignee: NSK-WARNER K.K.
    Inventors: Hiroshi Shibata, Tomoharu Andou, Hiroki Segawa, Hirobumi Shirataki
  • Publication number: 20090097159
    Abstract: A manufacturing method for a perpendicular magnetic recording head includes the steps of forming a groove in a first nonmagnetic layer, forming a side shield, forming a second nonmagnetic layer, forming a main-magnetic-pole front end portion and forming a main-magnetic-pole yoke portion. The groove extends in a front-rear direction orthogonal to an air bearing surface. The side shield of soft magnetic material, the second nonmagnetic layer and the main-magnetic-pole front end portion of soft magnetic material are formed on an inner wall of the groove. The main-magnetic-pole front end portion is not magnetostatically coupled to the side shield. The main-magnetic-pole yoke portion magnetically is insulated from the side shield and magnetically connected to the main-magnetic-pole front end portion. The main-magnetic-pole yoke portion widens from the main-magnetic-pole front end portion toward a rear side.
    Type: Application
    Filed: September 23, 2008
    Publication date: April 16, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Mitsuru Otagiri, Hiroshi Shirataki, Yuko Miyake
  • Publication number: 20080002306
    Abstract: The magnetic head is capable of preventing variation of magnetic fields working to a read-element, stably generating output signals and improving production yield. The magnetic head comprises: a read-head including a read-element; and a shield for magnetic-shielding the read-element, the shield has a hexagonal planar shape, and one side of the shield is flush with an air bearing surface of the magnetic head.
    Type: Application
    Filed: September 7, 2006
    Publication date: January 3, 2008
    Inventors: Mitsuru Otagiri, Hideyuki Akimoto, Masaya Kato, Hiroshi Shirataki
  • Publication number: 20070211380
    Abstract: The perpendicular magnetic head is capable of solving the problems of side track erasing and pole erasing. The perpendicular magnetic head of the present invention comprises a write-head, which includes a main magnetic pole emitting magnetic fluxes toward a recording medium. An end face of a pole end is formed into a T-shape. A longitudinal pole section of the pole end is made of a low Bs magnetic thin film, whose end face is formed into a rectangle. A transverse pole section of the pole end is made of a high Bs magnetic thin film, whose end face is formed into a rectangle. The low Bs magnetic thin film and the high Bs magnetic thin film are determined by the formula: (area of the end face of the low Bs magnetic thin film)×(saturation magnetic flux density of the low Bs magnetic thin film)>(area of the end face of the high Bs magnetic thin film)×(saturation magnetic flux density of the high Bs magnetic thin film).
    Type: Application
    Filed: July 7, 2006
    Publication date: September 13, 2007
    Inventors: Hideyuki Akimoto, Mitsuru Otagiri, Hiroshi Shirataki
  • Publication number: 20070211379
    Abstract: The perpendicular magnetic head is capable of solving the problem of pole-erasing and performing high density recording by a main magnetic pole. The perpendicular magnetic head comprises a write-head including a main magnetic pole, and the main magnetic pole is a magnetic thin film having magnetic anisotropy, in which a magnetizing direction is parallel to a recording surface of a recording medium.
    Type: Application
    Filed: June 2, 2006
    Publication date: September 13, 2007
    Inventors: Masaya Kato, Hiroshi Shirataki, Hideyuki Akimoto, Koichi Hirose
  • Patent number: 6605414
    Abstract: A method for manufacturing a magnetoresistance head of the present invention comprises the steps of forming an organic film on a multilayered film constituting a magnetoresistance device, forming an upper film formed of resist or inorganic film on the organic film, patterning the organic film and the upper film, cutting into edges of the organic film patterns from edges of the upper film patterns inwardly to such an extent that particles of the thin film being formed on the upper film and the multilayered film do not contact to side portions of the organic film patterns.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: August 12, 2003
    Assignee: Fujitsu Limtied
    Inventors: Keiji Watanabe, Koji Nozaki, Miwa Igarashi, Yoko Kuramitsu, Ei Yano, Takahisa Namiki, Hiroshi Shirataki, Keita Ohtsuka, Michiaki Kanamine, Yuji Uehara
  • Publication number: 20020110756
    Abstract: A method for manufacturing a magnetoresistance head of the present invention comprises the steps of forming an organic film on a multilayered film constituting a magnetoresistance device, forming an upper film formed of resist or inorganic film on the organic film, patterning the organic film and the upper film, cutting into edges of the organic film patterns from edges of the upper film patterns inwardly to such an extent that particles of the thin film being formed on the upper film and the multilayered film do not contact to side portions of the organic film patterns.
    Type: Application
    Filed: November 12, 1999
    Publication date: August 15, 2002
    Inventors: KEIJI WATANABE, KOJI NOZAKI, MIWA IGARASHI, YOKO KURAMITSU, EI YANO, TAKAHISA NAMIKI, HIROSHI SHIRATAKI, KEITA OHTSUKA, MICHIAKI KANAMINE, YUJI UEHARA
  • Patent number: 6052261
    Abstract: A method for manufacturing a magnetoresistance head of the present invention comprises the steps of forming an organic film on a multilayered film constituting a magnetoresistance device, forming an upper film formed of resist or inorganic film on the organic film, patterning the organic film and the upper film, cutting into edges of the organic film patterns from edges of the upper film patterns inwardly to such an extent that particles of the thin film being formed on the upper film and the multilayered film do not contact to side portions of the organic film patterns.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: April 18, 2000
    Assignee: Fujitsu Limited
    Inventors: Keiji Watanabe, Koji Nozaki, Miwa Igarashi, Yoko Kuramitsu, Ei Yano, Takahisa Namiki, Hiroshi Shirataki, Keita Ohtsuka, Michiaki Kanamine, Yuji Uehara