Patents by Inventor Masakazu Nakayama
Masakazu Nakayama 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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Patent number: 8282802Abstract: Provided with a work electrodeposition coating method for immersing a work in a paint in an electrodeposition tank provided with a first positive electrode for supplying a low voltage and a second positive electrode for supplying a high voltage to carry out electrodeposition coating of a work surface.Type: GrantFiled: August 27, 2008Date of Patent: October 9, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kimihiro Sato, Hidetoshi Kato, Masakazu Nakayama
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Publication number: 20100200414Abstract: Provided with a work electrodeposition coating method for immersing a work in a paint in an electrodeposition tank provided with a first positive electrode for supplying a low voltage and a second positive electrode for supplying a high voltage to carry out electrodeposition coating of a work surface.Type: ApplicationFiled: August 27, 2008Publication date: August 12, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kimihiro Sato, Hidetoshi Kato, Masakazu Nakayama
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Patent number: 7711238Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: GrantFiled: September 28, 2007Date of Patent: May 4, 2010Assignee: Fujikura Ltd.Inventors: Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Masakazu Oohashi, Daiichiro Tanaka
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Patent number: 7508115Abstract: A horn that can suppress oscillation components other than the component in the horizontal direction, a horn unit, and a bonding apparatus using same are provided. The horn has a cross-section variable section in which a cross section perpendicular to the lengthwise direction (X direction) thereof has a first region extending in the Z direction and a pair of second regions sandwiching the first region from Y direction. In the position P3 corresponding to an anti-node of a standing wave of oscillations excited in the horn, a sectional area S1 of the first region assumes a maximum and a sectional area S2 of the second region assumes a minimum. With a transition from the position P3 to the other positions corresponding to nodes, the sectional area S1 decreases and the sectional area S2 increases. As a result, oscillation components other than those in the X direction are suppressed.Type: GrantFiled: December 18, 2006Date of Patent: March 24, 2009Assignee: TDK CorporationInventors: Norihiko Kawada, Yuji Saito, Masakazu Nakayama, Toru Mizuno, Toshinobu Miyagoshi, Junichi Kamata
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Patent number: 7496261Abstract: A dispersion compensating optical fiber for NZ-DSFs, includes: an uncovered dispersion compensating optical fiber; a double-layered resin coating disposed around the uncovered dispersion compensating optical fiber; and an outer coating layer having a thickness of 3 to 7 ?m, containing silicone in an amount of 1 to 5% by weight, and disposed around the double-layered resin coating. The outer diameter of the uncovered dispersion compensating optical fiber is in a range from 90 to 125 ?m, an outer diameter of the dispersion compensating optical fiber is in a range from 180 to 250 ?m, and the amount of silicone contained in the outer coating layer is determined such that an adhesive property of the outer coating layer is 1 gf/mm or less.Type: GrantFiled: August 15, 2005Date of Patent: February 24, 2009Assignee: Fujikura Ltd.Inventors: Kazuhiko Aikawa, Yutaka Nagasawa, Shogo Shimizu, Takaaki Suzuki, Masakazu Nakayama, Kuniharu Himeno, Ryozo Yamauchi, Keiji Ohashi, Munehisa Fujimaki
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Patent number: 7406236Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: GrantFiled: February 16, 2006Date of Patent: July 29, 2008Assignee: Fujikura Ltd.Inventors: Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Masakazu Oohashi, Daiichiro Tanaka
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Patent number: 7346258Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: GrantFiled: January 5, 2005Date of Patent: March 18, 2008Assignee: Fujikura Ltd.Inventors: Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Masakazu Oohashi, Daiichiro Tanaka
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Publication number: 20080025679Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: ApplicationFiled: September 28, 2007Publication date: January 31, 2008Applicant: FUJIKURA LTD.Inventors: Masashi IKEDA, Masakazu NAKAYAMA, Kuniharu HIMENO, Masaaki OHTSUKA, Masakazu OOHASHI, Daiichiro TANAKA
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Publication number: 20070144680Abstract: A horn that can suppress oscillation components other than the component in the horizontal direction, a horn unit, and a bonding apparatus using same are provided. In the horn 50 in accordance with the present invention, oscillations are applied by an oscillator 42. The horn 50 has a cross-section variable section 54 in which a cross section perpendicular to the lengthwise direction (X direction) of the horn 50 has a first region A1 extending in the Z direction and a pair of second regions A2 sandwiching the first region A1 from the direction (Y direction) perpendicular to the Z direction. In the position P3 corresponding to an anti-node of a standing wave of oscillations excited in the horn 50, a sectional area S1 of the first region A1 assumes a maximum and a sectional area S2 of the second region A2 assumes a minimum.Type: ApplicationFiled: December 18, 2006Publication date: June 28, 2007Applicant: TDK CORPORATIONInventors: Norihiko Kawada, Yuji Saito, Masakazu Nakayama, Toru Mizuno, Toshinobu Miyagoshi, Junichi Kamata
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Patent number: 7233728Abstract: A dispersion-compensated optical fiber which does not cause an increase in a loss if it is wound in a small reel and has a stable temperature characteristics is provided, wherein, in a wavelength range from. A dispersion-compensated optical fiber is formed such that, in at least a wavelength between 1.53 to 1.63 ?m, a bending loss of with a 20 mm bending diameter is 5 dB/m or lower, a wavelength dispersion is ?120 ps/nm/km or lower, a cut-off wavelength under a usage condition is 1.53 ?m or lower, an outer diameter of the cladding is 80 to 100 ?m, an outer diameter of a coating is 160 to 200 ?m, and a viscosity of a surface of a coating resin is 10 gf/mm or lower. It is set such that b/a is 1.5 to 3.5, c/b is 1.2 to 2.0, a radius of a core is 4 to 8 ?m, ?1 is +1.6% to +2.6%, ?2 is ?0.30% to ?1.4%, and ?3 is ?0.30% to +1.0%. Young's modulus of a first coating layer is 0.15 kgf/mm2 or lower and its thickness is 20 to 30 ?m.Type: GrantFiled: March 13, 2003Date of Patent: June 19, 2007Assignee: Fujikura Ltd.Inventors: Kazuhiko Aikawa, Shogo Shimizu, Ryuji Suzuki, Masakazu Nakayama, Kuniharu Himeno
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Publication number: 20060140565Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: ApplicationFiled: February 16, 2006Publication date: June 29, 2006Inventors: Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Masakazu Oohashi, Daiichiro Tanaka
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Publication number: 20060062534Abstract: A dispersion compensating optical fiber for NZ-DSFs, includes: an uncovered dispersion compensating optical fiber; a double-layered resin coating disposed around the uncovered dispersion compensating optical fiber; and an outer coating layer having a thickness of 3 to 7 ?m, containing silicone in an amount of 1 to 5% by weight, and disposed around the double-layered resin coating. The outer diameter of the uncovered dispersion compensating optical fiber is in a range from 90 to 125 ?m, an outer diameter of the dispersion compensating optical fiber is in a range from 180 to 250 ?m, and the amount of silicone contained in the outer coating layer is determined such that an adhesive property of the outer coating layer is 1 gf/mm or less.Type: ApplicationFiled: August 15, 2005Publication date: March 23, 2006Inventors: Kazuhiko Aikawa, Yutaka Nagasawa, Shogo Shimizu, Takaaki Suzuki, Masakazu Nakayama, Kuniharu Himeno, Ryozo Yamauchi, Keiji Ohashi, Munehisa Fujimaki
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Patent number: 6965719Abstract: A dispersion compensating optical fiber includes an uncovered dispersion compensating optical fiber containing a core and a cladding, and a resin coating which is disposed around the uncovered dispersion compensating optical fiber, wherein the resin coating has an adhesive property of 10 g/mm or less, and which includes an outer coating layer which is formed to have a thickness of 3 ?m or more, and the outer diameter of the uncovered dispersion compensating optical fiber is in a range from 90 to 125 ?m, and the outer diameter of the dispersion compensating optical fiber is in a range from 180 to 250 ?m.Type: GrantFiled: March 21, 2002Date of Patent: November 15, 2005Assignee: Fujikura Ltd.Inventors: Kazuhiko Aikawa, Yutaka Nagasawa, Shogo Shimizu, Takaaki Suzuki, Masakazu Nakayama, Kuniharu Himeno, Ryozo Yamauchi, Keiji Ohashi, Munehisa Fujimaki
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Publication number: 20050249471Abstract: A dispersion-compensated optical fiber which does not cause an increase in a loss if it is wound in a small reel and has a stable temperature characteristics is provided. A dispersion-compensated optical fiber is formed such that, in at least a wavelength between 1.53 to 1.63 ?m, a bending loss of 20 mm bending diameter is 5 dB/m or lower, a wavelength dispersion is ?120 ps/nm/km or lower, a cut-off wavelength under a usage condition is 1.53 ?m or lower, an outer diameter of the cladding is 80 to 100 ?m, an outer diameter of a coating is 160 to 200 ?m, a viscosity of a surface of a coating resin is 10 gf/mm or lower. It is set such that b/a is 1.5 to 3.5, c/b is 1.2 to 2.0, a radius of a core is 4 to 8 ?m, ?1 is +1.6% to +2.6%, ?2 is ?0.30% to ?1.4%, and ?3 is ?0.3 0% to +1.0%. Young's modulus of a first coating layer is 0.15 kgf/nun 2 or lower and its thickness is 20 to 30 ?m. Young's modulus of a second coating layer is 50 kgf/mm2 or lower and its thickness is 15 to 30 ?m.Type: ApplicationFiled: March 13, 2003Publication date: November 10, 2005Inventors: Kazuhiko Aikawa, Shogo Shimizu, Ryuji Suzuki, Masakazu Nakayama, Kuniharu Himeno
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Patent number: 6949902Abstract: A controller of a rotating electric machine for a vehicle has a magnetic field electric current command arithmetic device for commanding a magnetic field electric current by the command of a torque and electric power command arithmetic device, an electric power converter functioning as a rectifier or an inverter, and a magnetic field electric current command restraining device for restraining a three-phase line electric current by restraining and controlling an output of the magnetic field electric current command arithmetic device when the rotating electric machine functions as an electric generator.Type: GrantFiled: December 15, 2004Date of Patent: September 27, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masakazu Nakayama, Masaru Kobayashi, Masato Mori, Kiyoharu Anzai
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Patent number: 6940250Abstract: In a synchronous motor control device that corrects a deviation in rotational position which is related to a rotational position detector for a synchronous motor on which vector-control is performed, the synchronous motor control device includes: a current instruction generator that disables a torque instruction to set d-axis and q-axis current instructions as zero when a phase correction instruction is inputted; a current controller that outputs d-axis and q-axis voltage instructions based on the d-axis and q-axis current instructions; a phase correction quantity detector for determining the amount of offset in which the d-axis voltage instruction becomes zero when the phase correction instruction is inputted and the d-axis voltage instruction is not zero; an adder for adding a rotor positional angle and the amount of offset; and a voltage converter for determining three-phase voltage instructions based on the additional value, the d-axis and q-axis voltage instructions.Type: GrantFiled: February 25, 2004Date of Patent: September 6, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shinji Nishimura, Masakazu Nakayama
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Patent number: 6937805Abstract: A dispersion compensating fiber, which has a negative dispersion slope with a large absolute value while maintaining the absolute value of the chromatic dispersion, and which has sufficient dispersion slope compensation properties even for the non-zero dispersion shifted optical fiber requiring a large RDS for dispersion compensation. In this dispersion compensating fiber, the radius of a ring core region is set in a range from 6.7 ?m to 10.7 ?m, the radius ratio of a depressed core region relative to a central core region is set in a range from 2.0 to 3.0, and the radius ratio of the ring core region relative to the depressed core region is set in a range from 1.3 to 2.0, the relative refractive index difference of the central core region relative to the cladding is set in a range from +1.00% to +1.80%, the relative refractive index difference of the depressed core region relative to the cladding is set in a range from ?1.20% to ?1.Type: GrantFiled: October 16, 2002Date of Patent: August 30, 2005Assignee: Fujikura, Ltd.Inventors: Kazuhiko Aikawa, Shogo Shimizu, Takaaki Suzuki, Ryuji Suzuki, Masakazu Nakayama, Kuniharu Himeno
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Publication number: 20050135762Abstract: An optical fiber that includes a core containing a first concentration of germanium, an inner cladding arranged on the core, the inner cladding containing a second concentration of germanium and having a first diffusion coefficient, and an outer cladding arranged on the inner cladding, the outer cladding having a second diffusion coefficient, where the first diffusion coefficient is larger than the second diffusion coefficient, and where the first concentration of germanium is about 200% or more of the second concentration of germanium. An optical fiber constructed in this manner can be spliced with an optical fiber having a different MFD, such as a single-mode optical fiber or an erbium-doped optical fiber, with low splice loss and a sufficient splicing strength.Type: ApplicationFiled: January 5, 2005Publication date: June 23, 2005Inventors: Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Masakazu Oohashi, Daiichiro Tanaka
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Publication number: 20050104551Abstract: In a synchronous motor control device that corrects a deviation in rotational position which is related to a rotational position detector for a synchronous motor on which vector-control is performed, the synchronous motor control device includes: a current instruction generator that disables a torque instruction to set d-axis and q-axis current instructions as zero when a phase correction instruction is inputted; a current controller that outputs d-axis and q-axis voltage instructions based on the d-axis and q-axis current instructions; a phase correction quantity detector for determining the amount of offset in which the d-axis voltage instruction becomes zero when the phase correction instruction is inputted and the d-axis voltage instruction is not zero; an adder for adding a rotor positional angle and the amount of offset; and a voltage converter for determining three-phase voltage instructions based on the additional value, the d-axis and q-axis voltage instructions.Type: ApplicationFiled: February 25, 2004Publication date: May 19, 2005Inventors: Shinji Nishimura, Masakazu Nakayama
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Publication number: 20050093519Abstract: A controller of a rotating electric machine for a vehicle has a magnetic field electric current command arithmetic device for commanding a magnetic field electric current by the command of a torque and electric power command arithmetic device, an electric power converter functioning as a rectifier or an inverter, and a magnetic field electric current command restraining device for restraining a three-phase line electric current by restraining and controlling an output of the magnetic field electric current command arithmetic device when the rotating electric machine functions as an electric generator.Type: ApplicationFiled: December 15, 2004Publication date: May 5, 2005Inventors: Masakazu Nakayama, Masaru Kobayashi, Masato Mori, Kiyoharu Anzai