Patents by Inventor Keita Tanaka

Keita Tanaka 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).

  • Publication number: 20120056603
    Abstract: Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.
    Type: Application
    Filed: November 9, 2011
    Publication date: March 8, 2012
    Applicant: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Patent number: 8064141
    Abstract: An optical element includes an airtight container having opposing face walls in a thickness direction, and side walls connecting the end face walls; a first liquid sealed in the container and having polarity or conductivity; a second liquid sealed in the container and not mixed with the first liquid so as to define an interface between the first liquid and the second liquid; and voltage applying means for applying a voltage to the first liquid. Further, the first liquid and the second liquid have the same specific gravity and substantially the same refractive index, and minute particles made of a material that does not transmit light are mixed in the first liquid, such that the first liquid has less light transmittance than the second liquid.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: November 22, 2011
    Assignee: Sony Corporation
    Inventor: Keita Tanaka
  • Patent number: 8058739
    Abstract: In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: November 15, 2011
    Assignee: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Publication number: 20110217654
    Abstract: The invention pertains to a compound generating an acid of the formula I or II, for instance corresponding sulfonium and iodonium salts, as well as corresponding sulfonyloximes wherein X is CH2 or CO; Y is O, NR4, S, O(CO), O(CO)O, O(CO)NR4, OSO2, O(CS), or O(CS)NR4; R1 is for example C1-C18alkyl, C1-C10haloalkyl, C2-C12alkenyl, C4-C30cycloalkenyl, phenyl-C1-C3-alkyl, C3-C30cycloalkyl, C3-C30cycloalkyl-C1-C18alkyl, interrupted C2-C18alkyl, interrupted C3-C30cycloalkyl, interrupted C3-C30cycloalkyl-C1-C18alkyl, interrupted C4-C30cycloalkenyl, phenyl, naphthyl, anthracyl, phenanthryl, biphenylyl, fluorenyl or heteroaryl, all unsubstituted or are substituted; or R1 is NR12R13; R2 and R3 are for example C3-C30cycloalkylene, C3-C30cycloalkyl-C1-C18alkylene, C1-C18alkylene, C1-C10haloalkylene, C2-C12alkenylene, C4-C30cycloalkenylene, phenylene, naphthylene, anthracylene, phenanthrylene, biphenylene or heteroarylene; all unsubstituted or substituted; R4 is for example C3-C30cycloalkyl, C3-C30cycloalkyl-C1-C18al
    Type: Application
    Filed: February 16, 2011
    Publication date: September 8, 2011
    Applicant: BASF SE
    Inventors: Hitoshi Yamato, Toshikage Asakura, Akira Matsumoto, Keita Tanaka, Yuichi Nishimae
  • Patent number: 7944618
    Abstract: An optical element is disclosed. The optical element may include a container having a holding chamber, a polar or conductive first liquid filled in the holding chamber, a second liquid filled in the holding chamber and not mixing with the first liquid, first and second electrodes for applying an electric field to the first liquid, and voltage application means for applying voltage between the first electrode and the second electrode.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: May 17, 2011
    Assignee: Sony Corporation
    Inventors: Tadahiro Ohishi, Keita Tanaka, Masaki Ando, Kazuhiro Tanaka
  • Patent number: 7935239
    Abstract: A liquid moving apparatus is disclosed. The liquid moving apparatus may include a container having a holding chamber enclosed by first and second end walls facing against each other and side walls connecting the first and second end walls, a polarized or conductive first liquid filled in the holding chamber, a second liquid filled in the holding chamber and prevented from mixing with the first liquid, first and second electrodes for applying an electric field to the first liquid, and voltage application means for applying voltage between the first electrode and the second electrode.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: May 3, 2011
    Assignee: Sony Corporation
    Inventors: Tadahiro Ohishi, Keita Tanaka, Masaki Ando, Kazuhiro Tanaka
  • Publication number: 20110094545
    Abstract: An object of this invention is to provide a cleaner composition that has a desirable cleaning property and is easily separable from pre-rinsing water even when cleaning an object produced by using a lead-free soldering flux; and a lead-free soldering flux removal system using a pre-rinsing method that can reduce the amount of waste fluid. The invention uses a cleaner composition for lead-free soldering flux, comprising (A) specific glycol ethers; (B) a specific polyoxyalkylene amine; and (C) a chelating agent that is at least one member selected from the group consisting of (c1) aliphatic hydroxycarboxylic acid chelating agents and (c2) (poly)phosphoric acid chelating agents.
    Type: Application
    Filed: August 17, 2009
    Publication date: April 28, 2011
    Applicant: Arakawa Chemical Industries, Ltd.
    Inventors: Keita Tanaka, Takashi Tanaka
  • Publication number: 20110009607
    Abstract: The present invention provides a method for preparing a DNA fragment, in which a desired double-stranded DNA fragment having a sticky end is directly and easily obtained from an amplification product (an amplified fragment) after PCR without a restriction enzyme digestion. The method for preparing a DNA fragment having a sticky end of the present invention comprises: (i) a step of performing a PCR reaction using a template DNA and specific primers to obtain an amplified DNA fragment; and (ii) a step of performing a prescribed treatment on the amplified DNA fragment to dissociate a protecting group from the fragment.
    Type: Application
    Filed: March 10, 2009
    Publication date: January 13, 2011
    Inventors: Makoto Komiyama, Akinori Kuzuya, Keita Tanaka
  • Patent number: 7854302
    Abstract: A bicycle brake apparatus comprises a securing bracket with an axle opening dimensioned to receive a bicycle wheel hub axle therethrough, a braked member that has a braking surface and is adapted to rotate with a bicycle wheel hub rotatably supported by the hub axle, a braking member adapted to contact the braking surface, and an operating unit that selectively causes the braking member to contact the braking surface. A locking unit is structured for attachment to the securing bracket, wherein the locking unit extends in an axial direction of the hub axle and is dimensioned to nonrotatably engage the bicycle frame radially inwardly of a rotating portion of the brake apparatus.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: December 21, 2010
    Assignee: Shimano, Inc.
    Inventors: Seiji Fukui, Keiji Matsueda, Keita Tanaka
  • Publication number: 20100134861
    Abstract: An optical element is disclosed. The optical element may include a container having a holding chamber, a polar or conductive first liquid filled in the holding chamber, a second liquid filled in the holding chamber and not mixing with the first liquid, first and second electrodes for applying an electric field to the first liquid, and voltage application means for applying voltage between the first electrode and the second electrode.
    Type: Application
    Filed: January 25, 2010
    Publication date: June 3, 2010
    Applicant: SONY CORPORATION
    Inventors: Tadahiro Ohishi, Keita Tanaka, Masaki Ando, Kazuhiro Tanaka
  • Patent number: 7701644
    Abstract: An optical element is disclosed. The optical element may include a container having a holding chamber, a polar or conductive first liquid filled in the holding chamber, a second liquid filled in the holding chamber and not mixing with the first liquid, first and second electrodes for applying an electric field to the first liquid, and voltage application means for applying voltage between the first electrode and the second electrode.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: April 20, 2010
    Assignee: Sony Corporation
    Inventors: Tadahiro Ohishi, Keita Tanaka, Masaki Ando, Kazuhiro Tanaka
  • Patent number: 7697213
    Abstract: An optical element is disclosed. The optical element may include a container having a holding chamber, a polar or conductive first liquid filled in the holding chamber, a second liquid filled in the holding chamber and not mixing with the first liquid, first and second electrodes for applying an electric field to the first liquid, and voltage application means for applying voltage between the first electrode and the second electrode.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: April 13, 2010
    Assignee: Sony Corporation
    Inventors: Tadahiro Ohishi, Keita Tanaka, Masaki Ando, Kazuhiro Tanaka
  • Patent number: 7646545
    Abstract: An optical element includes an airtight container having opposing face walls in a thickness direction, and side walls connecting the end face walls; a first liquid sealed in the container and having polarity or conductivity; a second liquid sealed in the container and not mixed with the first liquid so as to define an interface between the first liquid and the second liquid; and voltage applying means for applying a voltage to the first liquid. Further, the first liquid and the second liquid have the same specific gravity and substantially the same refractive index, and minute particles made of a material that does not transmit light are mixed in the first liquid, such that the first liquid has less light transmittance than the second liquid.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: January 12, 2010
    Assignee: Sony Corporation
    Inventor: Keita Tanaka
  • Publication number: 20090310205
    Abstract: An optical element includes an airtight container having opposing face walls in a thickness direction, and side walls connecting the end face walls; a first liquid sealed in the container and having polarity or conductivity; a second liquid sealed in the container and not mixed with the first liquid so as to define an interface between the first liquid and the second liquid; and voltage applying means for applying a voltage to the first liquid. Further, the first liquid and the second liquid have the same specific gravity and substantially the same refractive index, and minute particles made of a material that does not transmit light are mixed in the first liquid, such that the first liquid has less light transmittance than the second liquid.
    Type: Application
    Filed: August 17, 2009
    Publication date: December 17, 2009
    Applicant: Sony Corporation
    Inventor: Keita Tanaka
  • Patent number: 7604406
    Abstract: A plurality of elements can be analyzed simultaneously with high sensitivity using a microchip. The microchip (1) comprises a substrate (30), a channel (23) formed in the substrate (30), and an analyzing part (10) consisting of a part of flat surface of the substrate (30), where the outlet of the channel (23) is formed as an opening (9c) and measurement object liquid overflowed from the opening (9c) stays on the flat surface of the substrate (30) to become a sample of analysis. The measurement object liquid is made to overflow as a sample of analysis to the analyzing part (10) using the microchip (1) and then the sample of analysis is preferably dried before a primary X-ray is made to enter under conditions of total reflection and fluorescent X-rays are detected.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: October 20, 2009
    Assignee: Japan Science and Technology Agency
    Inventors: Kouichi Tsuji, Takehiko Kitamori, Manabu Tokeshi, Keita Tanaka, Kazuhiko Nakano
  • Publication number: 20090243294
    Abstract: In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current.
    Type: Application
    Filed: September 15, 2006
    Publication date: October 1, 2009
    Applicant: Toyo Electric Mfg. Co., Ltd.
    Inventors: Takashi Shiota, Keita Tanaka, Tsutomu Isaka
  • Patent number: 7568558
    Abstract: A bicycle brake apparatus comprises a securing bracket with an axle opening dimensioned to receive a bicycle wheel hub axle therethrough, a braked member that has a braking surface and is adapted to rotate with a bicycle wheel hub rotatably supported by the hub axle, a braking member adapted to contact the braking surface, and an operating unit that selectively causes the braking member to contact the braking surface. A locking unit is structured for attachment to the securing bracket, wherein the locking unit extends in an axial direction of the hub axle and is dimensioned to nonrotatably engage the bicycle frame radially inwardly of a rotating portion of the brake apparatus.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: August 4, 2009
    Assignee: Shimano, Inc.
    Inventors: Seiji Fukui, Keiji Matsueda, Keita Tanaka
  • Patent number: 7558000
    Abstract: An optical device includes: a sealed container having edge walls facing each other in a thickness direction of the container and a side wall connecting both of the edge walls; a first liquid with polarity or electrical conductivity and sealed within the container; a second liquid that is sealed within the container and does not mixed with the first liquid; and a voltage applying unit for applying a voltage across the first liquid. The first and second liquid have equal specific gravity, and transmissivity of the first liquid is lower than the transmissivity of the second liquid. An interface between the first liquid and the second liquid changes shape in response to a voltage applied by the voltage applying unit. The first liquid is formed so as to have equal specific gravity to the second liquid by mixing three or more kinds of liquids each having a different specific gravity.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: July 7, 2009
    Assignee: Sony Corporation
    Inventors: Keita Tanaka, Toru Udaka, Yukihiro Sano
  • Publication number: 20090147912
    Abstract: A plurality of elements can be analyzed simultaneously with high sensitivity using a microchip. The microchip (1) comprises a substrate (30), a channel (23) formed in the substrate (30), and an analyzing part (10) consisting of a part of flat surface of the substrate (30), where the outlet of the channel (23) is formed as an opening (9c) and measurement object liquid overflowed from the opening (9c) stays on the flat surface of the substrate (30) to become a sample of analysis. The measurement object liquid is made to overflow as a sample of analysis to the analyzing part (10) using the microchip (1) and then the sample of analysis is preferably dried before a primary X-ray is made to enter under conditions of total reflection and fluorescent X-rays are detected.
    Type: Application
    Filed: August 30, 2006
    Publication date: June 11, 2009
    Inventors: Kouichi Tsuji, Takehiko Kitamori, Manabu Tokeshi, Keita Tanaka, Kazuhiko Nakano
  • Patent number: 7544002
    Abstract: An optical device includes: a sealed container having edge walls facing each other in a thickness direction of the container and a side wall connecting both of the edge walls; a first liquid with polarity or electrical conductivity and sealed within the container; a second liquid that is sealed within the container and does not mix with the first liquid; and a voltage applying unit for applying a voltage across the first liquid. The first liquid and the second liquid have equal specific gravity, and transmissivity of the first liquid is lower than the transmissivity of the second liquid. An interface between the first liquid and the second liquid changes shape in response to a voltage applied by the voltage applying unit. A light transmission path that passes through the edge walls and extends in a direction of the thickness of the container is formed.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: June 9, 2009
    Assignee: Sony Corporation
    Inventor: Keita Tanaka