Patents by Inventor Yoshio Fujii

Yoshio Fujii 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: 7830062
    Abstract: A straight line portion of a substantially U-shaped angular wire having a substantially rectangular cross section and a straight line portion of a substantially U-shaped round wire having a substantially circular cross section are accommodated at a slot arranged at a stator of a motor. The round wire is arranged at a more radially inward portion of the slot than the angular wire is. The connecting portion of the round wire is arranged radially inwardly of the straight line portion thereof. The connecting portion of the angular wire is arranged radially outwardly of the straight line portion thereof.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: November 9, 2010
    Assignee: Nidec Corporation
    Inventors: Yoshio Fujii, Yosuke Yamada, Hideaki Suzuki
  • Patent number: 7748189
    Abstract: A tile having a self-interlocking mechanism urges rain water running on the surface of the tile to run downward thus making it for rain water to leak less through a joint. The tile includes a tile base, an underlap portion on each of an upper side area and one of a left-hand side area and a right-hand side area of the tile base, and an overlap portion on each of a lower side area and the other of the left-hand side area and the right-hand side area of the tile base. The tile may be arranged horizontally and vertically in a plain in a self-interlocking manner. The tile includes a tilt portion tapered thinner toward the lower end of the tile base.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 6, 2010
    Assignee: Cosmic Garden Co., Ltd.
    Inventor: Yoshio Fujii
  • Patent number: 7737592
    Abstract: In a motor, an upper surface of a flange portion of a shaft is arranged axially below a bottom end surface of a rotor core. A spacer having an axial thickness slightly greater than that of the flange portion is arranged on a radially outer side of the flange portion. A bottom surface of the spacer makes contact with an end plate whose inner circumferential surface has a radius, centered about a central axis, smaller than a radius of the flange portion. The end plate is secured to the rotor core via a fixing member.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: June 15, 2010
    Assignee: Nidec Corporation
    Inventors: Yusuke Makino, Yoshio Fujii
  • Patent number: 7723879
    Abstract: A stator of a motor includes a plurality of busbar plates, each laminated above a stator core in an axial direction and connected to a plurality of wires having a substantially U-shaped configuration. Each busbar plate includes a plurality of busbars arranged in a circumferential direction, and a busbar holder of insulating quality to which the plurality of busbars are integrally affixed. The wires include a line portion, and a connecting end portion having a substantially columnar shape protruding from an end surface of the line portion. The busbar makes contact with the end surface of the line portion and is connected by welding to the connecting end portion.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 25, 2010
    Assignee: Nidec Corporation
    Inventors: Yoshio Fujii, Yosuke Yamada, Hideaki Suzuki
  • Patent number: 7646127
    Abstract: In a stator of a motor, a first winding of each coil is arranged around three teeth next to one another and a second winding of each coil is arranged around three teeth with a tooth which is arranged at an end of the three teeth for the first winding at a center thereof. By virtue of such configuration, each coil is arranged around four teeth in a distributed manner.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: January 12, 2010
    Assignee: Nidec Corporation
    Inventors: Yoshio Fujii, Hideaki Suzuki
  • Patent number: 7612480
    Abstract: A rotor portion of a motor includes a rotor core and a plurality of field magnets arranged in a circumferential direction at the rotor core. The rotor core includes at a flux barrier portion thereof arranged between a pair of field magnets of opposite magnetic polarities arranged next to one another a flux barrier hole. The flux barrier hole is independent of a magnet retaining hole in which the field magnet is retained. The magnet retaining hole includes a concave portion extending from a side thereof nearest to the flux barrier hole toward the corresponding flux barrier hole.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: November 3, 2009
    Assignee: Nidec Corporation
    Inventors: Yoshio Fujii, Hideaki Suzuki
  • Patent number: 7605467
    Abstract: An upper sealing ring and a lower sealing ring are adhered by sealing solder. The width of tip end of sealing projection is narrower than the width of the lower sealing ring. Therefore, the sealing solder is placed on lower sealing ring and on the side surface of upper sealing ring. Further, an upper connection pad and a lower connection pad are adhered by connecting solder. The width of a tip end of a connection projection is narrower than the width of lower connection pad. Therefore, the connecting solder is placed on the lower connection pad and on the side surface of upper connection pad. Thus, a package is provided, which attains satisfactory electrical connection and hermetic seal after solder joint of the upper and lower substrates.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: October 20, 2009
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshio Fujii, Hiroshi Fukumoto, Shinpei Ogawa, Yoshinori Yokoyama
  • Publication number: 20090062151
    Abstract: A method for analyzing a plurality of amino acids in a fluid sample by a user is provided comprising the steps of introducing the sample into a buffer solution, passing the sample in the buffer solution through a separation column and setting a lithium ion concentration in the buffer to no more than 0.3 mols/L up to a time before ?-aminoisobutyric acid (?-AiBA) is eluted.
    Type: Application
    Filed: August 22, 2008
    Publication date: March 5, 2009
    Inventors: Yoshio Fujii, Masahito Ito, Kimiyoshi Koda
  • Publication number: 20080277845
    Abstract: A motor used in a hydraulic shock absorber which absorbs the vibrations generated by an engine of a vehicle includes a rotor portion, a stator portion, and a bearing mechanism. The bearing mechanism includes a sleeve, a sleeve holder, and a chip member. The sleeve holder includes a single component having a cylindrical portion which covers an outer circumferential surface of the sleeve, and a bottom portion which covers a lower portion of the cylindrical portion.
    Type: Application
    Filed: May 8, 2008
    Publication date: November 13, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Takahiro HIWA, Hisashi FUJIHARA
  • Patent number: 7432108
    Abstract: A method for analyzing a plurality of amino acids in a fluid sample by a user is provided comprising the steps of introducing the sample into a buffer solution, passing the sample in the buffer solution through a separation column and setting a lithium ion concentration in the buffer to no more than 0.3 mols/L up to a time before ?-aminoisobutyric acid (?-AiBA) is eluted.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: October 7, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yoshio Fujii, Masahito Ito, Kimiyoshi Koda
  • Publication number: 20080174203
    Abstract: In a motor, an upper surface of a flange portion of a shaft is arranged axially below a bottom end surface of a rotor core. A spacer having an axial thickness slightly greater than that of the flange portion is arranged on a radially outer side of the flange portion. A bottom surface of the spacer makes contact with an end plate whose inner circumferential surface has a radius, centered about a central axis, smaller than a radius of the flange portion. The end plate is secured to the rotor core via a fixing member.
    Type: Application
    Filed: January 18, 2008
    Publication date: July 24, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yusuke Makino, Yoshio Fujii
  • Publication number: 20080136274
    Abstract: A stator of a motor includes a plurality of busbar plates, each laminated above a stator core in an axial direction and connected to a plurality of wires having a substantially U-shaped configuration. Each busbar plate includes a plurality of busbars arranged in a circumferential direction, and a busbar holder of insulating quality to which the plurality of busbars are integrally affixed. The wires include a line portion, and a connecting end portion having a substantially columnar shape protruding from an end surface of the line portion. The busbar makes contact with the end surface of the line portion and is connected by welding to the connecting end portion.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 12, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Yosuke YAMADA, Hideaki SUZUKI
  • Publication number: 20080136284
    Abstract: A straight line portion of a substantially U-shaped angular wire having a substantially rectangular cross section and a straight line portion of a substantially U-shaped round wire having a substantially circular cross section are accommodated at a slot arranged at a stator of a motor. The round wire is arranged at a more radially inward portion of the slot than the angular wire is. The connecting portion of the round wire is arranged radially inwardly of the straight line portion thereof. The connecting portion of the angular wire is arranged radially outwardly of the straight line portion thereof.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 12, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Yosuke YAMADA, Hideaki SUZUKI
  • Publication number: 20080136283
    Abstract: In a stator of a motor, a first winding of each coil is arranged around three teeth next to one another and a second winding of each coil is arranged around three teeth with a tooth which is arranged at an end of the three teeth for the first winding at a center thereof. By virtue of such configuration, each coil is arranged around four teeth in a distributed manner.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 12, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Hideaki SUZUKI
  • Publication number: 20080136281
    Abstract: A rotor portion of a motor includes a rotor core and a plurality of field magnets arranged in a circumferential direction at the rotor core. The rotor core includes at a flux barrier portion thereof arranged between a pair of field magnets of opposite magnetic polarities arranged next to one another a flux barrier hole. The flux barrier hole is independent of a magnet retaining hole in which the field magnet is retained. The magnet retaining hole includes a concave portion extending from a side thereof nearest to the flux barrier hole toward the corresponding flux barrier hole.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 12, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Hideaki SUZUKI
  • Publication number: 20080080975
    Abstract: An electric pump for use with an engine in a vehicle is provided. The electric pump has an impeller having a plurality of blades for moving coolant. A working surface of each blade is formed to be a flat plane which extends generally straight in both an axial direction and a radial direction. The electric pump is formed by a centrifugal pump. When the electric pump is not operating and is used as a portion of a coolant passage, flowing resistance can be reduced as compared with a case where the working surface of each blade is curved.
    Type: Application
    Filed: September 25, 2007
    Publication date: April 3, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshio FUJII, Kenichirou HAMAGISHI, Toshinobu SHINOHARA
  • Patent number: 7346975
    Abstract: A method of manufacturing a stator core for an inner rotor type of motor. The core back of the stator core in the motor has an arc shaped inner circumferential surface therein that is offset from the center thereof. The stator core is produced from a laminated body having a stator core, a chuck frame that is integral with and surrounds the stator core, and connector arms that connect the stator core and the chuck frame and integral therewith. After the windings are wound around the stator teeth, the stator core is cut from each connecting arm and the stator core is removed from the chuck frame.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 25, 2008
    Assignee: Nidec Corporation
    Inventors: Yoshio Fujii, Susumu Terada
  • Publication number: 20080016813
    Abstract: A tile having a self-interlocking mechanism urges rain water running on the surface of the tile to run downward thus making it for rain water to leak less through a joint. The tile includes a tile base, an underlap portion on each of an upper side area and one of a left-hand side area and a right-hand side area of the tile base, and an overlap portion on each of a lower side area and the other of the left-hand side area and the right-hand side area of the tile base. The tile may be arranged horizontally and vertically in a plain in a self-interlocking manner. The tile includes a tilt portion tapered thinner toward the lower end of the tile base.
    Type: Application
    Filed: May 27, 2005
    Publication date: January 24, 2008
    Inventor: Yoshio Fujii
  • Patent number: D581434
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: November 25, 2008
    Assignee: Nidec Corporation
    Inventors: Kenichirou Hamagishi, Yoshio Fujii
  • Patent number: D592681
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 19, 2009
    Assignee: Nidec Corporation
    Inventors: Kenichirou Hamagishi, Yoshio Fujii