Patents by Inventor Kazuhiko Yoshida
Kazuhiko Yoshida 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).
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Publication number: 20090215969Abstract: Disclosed is an epoxy resin composition which is solid at ordinary room temperature, cures with excellent light resistance and heat resistance and minimal shrinkage, and is useful for encapsulating LEDs. The epoxy resin composition is characterized by comprising as an essential component an epoxy resin having an epoxy equivalent of 300-1000 g/eq and a softening point of 65-110° C. obtained by reacting a nonaromatic polycarboxylic acid (A) having an acid value of 100-250 mgKOH/g with a nonaromatic epoxy resin (B) having an epoxy equivalent of 100-400 g/eq. The nonaromatic polycarboxylic acid (A) may be obtained by reacting 1,4-cyclohexanedimethanol, 2,2-bis(4-hydroxycyclohexyl)propane, or 3,9-bis(1,1-dimethyl-2-hydroxyethyl)-2,4,8,10-tetraoxaspiro[5,5]undecane with methylhexahydrophthalic acid or hexahydrophthalic acid.Type: ApplicationFiled: August 23, 2006Publication date: August 27, 2009Applicant: NIPPON STEEL CHEMICAL CO., LTDInventors: Kazumasa Kobayashi, Chiaki Asano, Hiroshi Sato, Yasuyuki Takeda, Kazuhiko Yoshida
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Publication number: 20090177098Abstract: The blood flow is examined by making multifractal analysis of a blood flow velocity distribution in a vascular network and detecting a deviation of the blood flow velocity distribution from the multifractal distribution. The blood flow velocity distribution is provided as an image by irradiating laser light to the vascular network, converging, by an imaging lens, scattered laser light rays by blood cells in the blood flowing through blood vessels, detecting, by a photodetector, a speckle pattern produced owing to random interference between the scattered laser light rays and calculating the rate of change with time lapse of each speckle in the speckle pattern.Type: ApplicationFiled: December 8, 2006Publication date: July 9, 2009Inventors: Kousuke Yakubo, Kazuhiko Yoshida, Hitoshi Fujii, Kazuhiko Oka, Satoshi Tanda, Ryuuji Morita
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Publication number: 20090137326Abstract: A joint outer ring (4) of a constant-velocity joint (1) has a stem portion (10) protruding from of a cup portion (9) and inserted to a through hole (31) of a hub (27) in a bearing device (2). The joint outer ring (4) has an abutment face (9aa) abutting against an end face of a bearing inner ring (28) fitted to an outer periphery of the hub (27) in an outer bottom face (9a) of the cup portion, and is composed of a forged product of a steel material. The joint outer ring (4) has a base material portion composed of a standard structure and an outer surface layer partially formed as a non-standard structure portion (30). The non-standard structure may be any one of an upper bainite structure, a lower bainite structure and a tempered martensite structure, or a mixed structure of at least two of the structures.Type: ApplicationFiled: August 9, 2006Publication date: May 28, 2009Inventors: Isao Hirai, Kazuhiko Yoshida
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Patent number: 7533881Abstract: A sheet feeding device including: a sheet feeding roller for sending sheets out one-by-one; a sheet stacking section in which a plurality of sheets can be stacked, and which pushes a sheet against the sheet feeding roller; an upper guide member able to move between a guiding position at which, at a time of double-sided printing, the upper guide member re-feeds to the image forming section an inverted sheet which is sent-in by a sheet re-feeding section, and a withdrawn position, at which sheet feeding of the sheet stacking section is possible; and a lower guide member which is rotatable and which abuts leading ends of sheets stacked in the sheet stacking section, wherein a guide path, which guides a sheet which is re-fed at the time of double-sided printing, is formed due to the upper guide member and the lower guide member rotating interlockingly.Type: GrantFiled: November 1, 2005Date of Patent: May 19, 2009Assignee: Fuji Xerox Co., Ltd.Inventor: Kazuhiko Yoshida
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Publication number: 20090106980Abstract: A method is directed to a production of a bearing device for a wheel including an inner member (1) and an outer member (2) rotatable relative to each other through a plurality of rolling elements (3), in which a component part forming one of the inner member (1) and the outer member (2) is a hot forged product. In the practice of this method, during or at the end of a hot forging step for hot forging the component part, a portion of the component part is cooled by spraying a coolant or by controlling an atmospheric temperature, to thereby render a matrix of the component part to represent a standard structure and render a surface portion of the component part to represent a non-standard structure (30).Type: ApplicationFiled: July 10, 2006Publication date: April 30, 2009Inventors: Isao Hirai, Kohei Yoshino, Takayasu Takubo, Kazuhiko Yoshida, Kazukuni Hase, Hideto Kimura, Kiyoshi Uwai, Takaaki Toyooka
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Publication number: 20090104752Abstract: The present invention relates to a method for producing an SOI wafer, having at least a step of a bonding heat treatment for increasing bonding strength by heat-treating a bonded wafer obtained by bonding a base wafer and a bond wafer, in which argon is ion-implanted from a surface of either the base wafer or the bond wafer at a dosage of 1×1015 atoms/cm2 or more at least before the bonding step, the surface ion-implanted with argon is used as a bonding surface in the bonding step, and an increase rate of temperature to a treatment temperature of the bonding heat treatment is 5° C./minute or higher. Thus the present invention provides a method for producing an SOI wafer facilitating the efficient production of an SOI wafer having in the neighborhood of a buried insulator layer thereof a polycrystalline silicon layer uniform in thickness introduced and having high gettering ability toward metal contaminations in the SOI layer by a simple and low-cost method.Type: ApplicationFiled: April 16, 2007Publication date: April 23, 2009Inventors: Kazuhiko Yoshida, Masao Matsumine, Hiroshi Takeno
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Patent number: 7503559Abstract: A sheet supplying device, which supplies a sheet to an image forming section, has a sheet feeding roller, a sheet stacking section, and a guiding member. The sheet feeding roller sends sheets out one-by-one. The sheet stacking section can be stacked with plural sheets and pushes a sheet against the sheet feeding roller. The guiding member is able to move between a guiding position and a withdrawn position. At the guiding position, at a time of double-sided printing, the guiding member re-supplies to the image forming section an inverted sheet which is sent-in by a sheet re-supplying section. At the withdrawn position, the guiding member is moved toward the sheet feeding roller and feeding of the sheet of the sheet stacking section is possible.Type: GrantFiled: December 5, 2005Date of Patent: March 17, 2009Assignee: Fuji Xerox Co., Ltd.Inventor: Kazuhiko Yoshida
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Patent number: 7476935Abstract: A semiconductor device is configured to prevent destruction of elements and/or miss-operation of the circuit by parasitic effects produced by parasitic transistors when a MOSFET of a bridge circuit is formed on a single chip. A Schottky junction is formed by providing an anode electrode in an n well region where a source region, a drain region, and a p well region of a lateral MOSFET. A Schottky barrier diode constituting a majority carrier device is connected in parallel with a PN junction capable of being forward-biased so that the PN junction is not forward-biased so that minority carriers are not generated, and thereby suppressing parasitic effects.Type: GrantFiled: February 10, 2005Date of Patent: January 13, 2009Assignee: Fuji Electric Co., Ltd.Inventors: Naoki Kumagai, Yuuichi Harada, Shinichi Jimbo, Yoshihiro Ikura, Tatsuhiko Fujihira, Kazuhiko Yoshida
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Publication number: 20080285188Abstract: A composite integrated semiconductor device. In one embodiment, an input surge/noise absorbing circuit absorbs surge from an input signal, an attenuating circuit attenuates the input signal, and an electrical signal converting circuit converts the input signal to an output signal. The input surge/noise absorbing circuit, the attenuating circuit, and the electrical signal converting circuit together form a unit, and a plurality of these units are arranged in parallel in one semiconductor substrate to form the composite integrated semiconductor device, resulting in a reduction in the number of discrete components mounted on a printed circuit board.Type: ApplicationFiled: February 22, 2008Publication date: November 20, 2008Inventors: Shin Kiuchi, Kazuhiko Yoshida, Takeshi Ichimura, Naoki Yaezawa, Shoichi Furuhata
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Patent number: 7452136Abstract: A vehicle wheel bearing apparatus which can increase the strength and durability of the hub wheel under rotary bending conditions as well as lighten the apparatus without changing the configuration and dimension of the wheel mounting flange and without causing surface run-out has an outer member formed with double row outer raceway surfaces on its inner peripheral surface. An inner member is formed with double row inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces, respectively, of the outer and inner members. A wheel mounting flange is integrally formed with either one of the outer or inner members. At least one of the outer and inner members, on which the wheel mounting flange is formed, is heat treated and their raceway surfaces are hardened by quenching to a predetermined surface hardness.Type: GrantFiled: June 10, 2004Date of Patent: November 18, 2008Assignee: NTN CorporationInventors: Isao Hirai, Takayasu Takubo, Kazuhiko Yoshida
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Patent number: 7352548Abstract: A composite integrated semiconductor device. In one embodiment, an input surge/noise absorbing circuit absorbs surge from an input signal, an attenuating/level-shifting circuit attenuates or level-shifts the input signal, and an electrical signal converting circuit converts the input signal to an output signal. The input surge/noise absorbing circuit, the attenuating or level-shifting circuit, and the electrical signal converting circuit together form a unit, and a plurality of these units are arranged in parallel in one semiconductor substrate to form the composite integrated semiconductor device, resulting in a reduction in the number of discrete components mounted on a printed circuit board.Type: GrantFiled: March 19, 2007Date of Patent: April 1, 2008Assignee: Fuji Electric Co., Ltd.Inventors: Shin Kiuchi, Kazuhiko Yoshida, Takeshi Ichimura, Naoki Yaezawa, Shoichi Furuhata
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Publication number: 20070285855Abstract: A composite integrated semiconductor device. In one embodiment, an input surge/noise absorbing circuit absorbs surge from an input signal, an attenuating/level-shifting circuit attenuates or level-shifts the input signal, and an electrical signal converting circuit converts the input signal to an output signal. The input surge/noise absorbing circuit, the attenuating or level-shifting circuit, and the electrical signal converting circuit together form a unit, and a plurality of these units are arranged in parallel in one semiconductor substrate to form the composite integrated semiconductor device, resulting in a reduction in the number of discrete components mounted on a printed circuit board.Type: ApplicationFiled: March 19, 2007Publication date: December 13, 2007Applicant: FUJI ELECRIC CO., LTD.Inventors: Shin Kiuchi, Kazuhiko Yoshida, Takeshi Ichimura, Naoki Yaezawa, Shoichi Furuhata
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Publication number: 20070278734Abstract: An image forming apparatus includes: an image forming part; a sheet container that contains sheets fed to the image forming part in a stacked state; a feed roller that feeds the sheet from the sheet container; a separation member in press-contact with the feed roller that separates the sheet at a contact point formed between the feed roller and the separation member; and a press-contact force reducing unit that reduces a press contact force of the separation member to the feed roller while maintaining an approximately constant sheet separating force with the separation member.Type: ApplicationFiled: December 14, 2006Publication date: December 6, 2007Inventor: Kazuhiko Yoshida
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Patent number: 7263904Abstract: To provide a torque detecting device having a sufficient mechanical strength, capable of accomplishing an accurate torque measurement, having a processability excellent for mass-production, and effective to eliminate problems associated with damages which would be brought about during a heat treatment. This torque detecting device includes a target area subject to torque detection (3) provided in a surface region of a torque transmitting shaft (2) made of a steel material; a detecting coil (4) provided in a non-contact fashion in face-to-face relation to an outer periphery of the target area subject to torque detection (3); and a detection signal processing circuit (5). The target area subject to torque detection (3) is a layer of magnetostrictive material comprised of an Al diffusion layer. This diffusion layer contains Al diffused in a steel material in a concentration which gradually decreases from the surface in a direction radially inwardly of the torque transmitting shaft (2).Type: GrantFiled: May 10, 2004Date of Patent: September 4, 2007Assignee: NTN CorporationInventors: Kazuhiko Yoshida, Takashi Koike, Kenichi Iwamoto
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Publication number: 20070201783Abstract: A bearing device for a wheel enabling the easy control of quality since there is no possibility of cracking even if caulking is applied thereto. The bearing device comprises an outer ring having double rows of raceway surfaces on the inner periphery thereof, an inner member having raceway surfaces opposed to the raceway surfaces, and balls interposed between the double rows of raceway surfaces opposed to each other. The inner member further comprises a HUB ring and an inner ring. Caulking is applied to the HUB ring to join it to the inner ring. The grain size number of the austenite grains of a caulked section is at least 6.Type: ApplicationFiled: March 3, 2005Publication date: August 30, 2007Inventors: Isao Hirai, Takayasu Takubo, Kazuhiko Yoshida
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Publication number: 20070187004Abstract: A hub ring and/or an outer ring constituting a bearing device for a wheel, which is formed of a steel which contains 0.45 to 0.70 mass % of C and at least one of V, Nb and Ti in a total amount of 0.3 mass % or less, wherein a micro structure of a part being not surface-hardening-treated contains a ferrite in 15 to 30 area % and contains a particulate ferrite.Type: ApplicationFiled: March 3, 2005Publication date: August 16, 2007Inventors: Isao Hirai, Takayasu Takubo, Kazuhiko Yoshida
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Patent number: 7247923Abstract: A semiconductor device realizes a high electrostatic discharge withstanding capability and a high surge withstanding capability within the narrow chip area of a lateral MOSFET used in integrated intelligent switching devices, double-integration-type signal input and transfer IC's, and combined power IC's. The semiconductor device includes a vertical bipolar transistor in which a base is electrically connected to an emitter and a collector, and a lateral MOSFET including a drain electrode connected to a surface electrode. The vertical bipolar transistor absorbs electrostatic discharge or surge energy when a high electrostatic discharge voltage or a high surge voltage is applied and limits the electrostatic discharge voltage or the surge voltage to be lower than the breakdown voltage of the lateral MOSFET.Type: GrantFiled: September 26, 2005Date of Patent: July 24, 2007Assignee: Fuji Electric Co., Ltd.Inventors: Kazuhiko Yoshida, Takeshi Ichimura, Tatsuhiko Fujihira, Naoki Kumagai
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Publication number: 20070140768Abstract: An image forming apparatus includes: an image forming part; a first conveyance roller that conveys a recording medium to the image forming part; a forward/reverse-rotatable second conveyance roller, located between the first conveyance roller and the image forming part in a conveyance direction of the recording medium; a contact member, in contact with the second conveyance roller, that forms a nip between the second conveyance roller and the contact member; a first conveyance roller driver that rotate-drives the first conveyance roller in the same direction as the conveyance direction of the recording medium; and a drive transmission mechanism that performs drive transmission from the first conveyance roller driver to the second conveyance roller so as to start rotation of the second conveyance roller in a reverse direction of the conveyance direction of the recording medium before a lead edge of the recording medium arrives at the nip.Type: ApplicationFiled: December 12, 2006Publication date: June 21, 2007Inventor: Kazuhiko Yoshida
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Publication number: 20070022809Abstract: To provide a torque detecting device having a sufficient mechanical strength, capable of accomplishing an accurate torque measurement, having a processability excellent for mass-production, and effective to eliminate problems associated with damages which would be brought about during a heat treatment. This torque detecting device includes a target area subject to torque detection (3) provided in a surface region of a torque transmitting shaft (2) made of a steel material; a detecting coil (4) provided in a non-contact fashion in face-to-face relation to an outer periphery of the target area subject to torque detection (3); and a detection signal processing circuit (5). The target area subject to torque detection (3) is a layer of magnetostrictive material comprised of an Al diffusion layer. This diffusion layer contains Al diffused in a steel material in a concentration which gradually decreases from the surface in a direction radially inwardly of the torque transmitting shaft (2).Type: ApplicationFiled: May 10, 2004Publication date: February 1, 2007Inventors: Kazuhiko Yoshida, Takashi Koike, Kenichi Iwamoto
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Publication number: 20070007715Abstract: A sheet feeding device relating to the present invention includes: a sheet feeding roller for sending sheets out one-by-one; a sheet stacking section in which a plurality of sheets can be stacked, and which pushes a sheet against the sheet feeding roller; an upper guide member able to move between a guiding position at which, at a time of double-sided printing, the upper guide member re-feeds to the image forming section an inverted sheet which is sent-in by a sheet re-feeding section, and a withdrawn position, at which sheet feeding of the sheet stacking section is possible; and a lower guide member which is rotatable and which abuts leading ends of sheets stacked in the sheet stacking section, wherein a guide path, which guides a sheet which is re-fed at the time of double-sided printing, is formed due to the upper guide member and the lower guide member rotating interlockingly.Type: ApplicationFiled: November 1, 2005Publication date: January 11, 2007Inventor: Kazuhiko Yoshida