Patents by Inventor Katsuyuki Kawamura

Katsuyuki Kawamura 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: 10180376
    Abstract: A ball bearing inspection device includes: an arbor supporting an inner ring on the outer circumferential surface; a rotary drive unit driving the arbor; a first pressing unit applying a preload to a ball bearing; a second pressing unit applying a preload in an opposite direction of the pressing direction; and a vibration detection unit detecting vibration from the ball bearing. The arbor includes an abutting section that protrudes outward from the outer circumferential surface, a movable flange arranged apart from the abutting section, and a flange drive mechanism switching the movable flange between a first state in which the movable flange protrudes from the outer circumferential surface and a second state in which the movable flange is accommodated within the arbor. The flange drive mechanism is additionally provided with a drive force supply unit that applies drive force for switching to the first or the second state.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: January 15, 2019
    Assignee: NSK LTD.
    Inventors: Daisuke Kondo, Taito Shibuya, Kentarou Kachi, Katsuyuki Kawamura, Shinichi Takamura
  • Publication number: 20170089807
    Abstract: A ball bearing inspection device includes: an arbor supporting an inner ring on the outer circumferential surface; a rotary drive unit driving the arbor; a first pressing unit applying a preload to a ball bearing; a second pressing unit applying a preload in an opposite direction of the pressing direction; and a vibration detection unit detecting vibration from the ball bearing. The arbor includes an abutting section that protrudes outward from the outer circumferential surface, a movable flange arranged apart from the abutting section, and a flange drive mechanism switching the movable flange between a first state in which the movable flange protrudes from the outer circumferential surface and a second state in which the movable flange is accommodated within the arbor. The flange drive mechanism is additionally provided with a drive force supply unit that applies drive force for switching to the first or the second state.
    Type: Application
    Filed: May 20, 2015
    Publication date: March 30, 2017
    Applicant: NSK LTD.
    Inventors: Daisuke KONDO, Taito SHIBUYA, Kentarou KACHI, Katsuyuki KAWAMURA, Shinichi TAKAMURA
  • Patent number: 8462240
    Abstract: An imaging system may include an image sensor array and column randomizing multiplexers. The imaging system may include a data output circuit and image readout circuitry such as analog amplifiers, analog-to-digital converters, and memory circuits. The column randomizing multiplexers may include a first column randomizing multiplexer between the image sensor array and at least some of the image readout circuitry. The first column randomizing multiplexer may randomly connect columns of the image sensor array to the image readout circuitry. The connections made by the first column randomizing multiplexer may be randomized as each row of the image sensor array is read out. The column randomizing multiplexers may include a second column randomizing multiplexer between at least some of the image readout circuitry and the data output circuit. The second column randomizing multiplexer may reorder image data for the image readout circuitry.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: June 11, 2013
    Assignee: Aptina Imaging Corporation
    Inventors: Shinji Osawa, Isao Takayanagi, Katsuyuki Kawamura, Toshiaki Sato, Norio Yoshimura, Shinichiro Matsuo, Hidenari Honda
  • Patent number: 8341844
    Abstract: With respect to an outer ring 2b in which a diameter DB1 of a first outer ring raceway 10c is greater than a diameter DB2 of a second outer ring raceway 10b (DB1>DB2), a method is realized which facilitates the entry of a grinding tool 12 into an inner side of the outer ring when these both outer ring raceways 10c and 10b are subjected to a grinding process. The grinding tool 12 is made to enter the inner side of the outer ring 2b through an opening on a side close to the first outer ring raceway 10c.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: January 1, 2013
    Assignee: NSK Ltd.
    Inventors: Shigemi Tsukamoto, Katsuyuki Kawamura, Hirohide Ishida, Tatsuo Wakabayashi
  • Publication number: 20120062772
    Abstract: An imaging system may include an image sensor array and column randomizing multiplexers. The imaging system may include a data output circuit and image readout circuitry such as analog amplifiers, analog-to-digital converters, and memory circuits. The column randomizing multiplexers may include a first column randomizing multiplexer between the image sensor array and at least some of the image readout circuitry. The first column randomizing multiplexer may randomly connect columns of the image sensor array to the image readout circuitry. The connections made by the first column randomizing multiplexer may be randomized as each row of the image sensor array is read out. The column randomizing multiplexers may include a second column randomizing multiplexer between at least some of the image readout circuitry and the data output circuit. The second column randomizing multiplexer may reorder image data for the image readout circuitry.
    Type: Application
    Filed: September 15, 2010
    Publication date: March 15, 2012
    Inventors: Shinji Osawa, Isao Takayanagi, Katsuyuki Kawamura, Toshiaki Sato, Norio Yoshimura, Shinichiro Matsuo, Hidenari Honda
  • Publication number: 20090199404
    Abstract: With respect to an outer ring 2b in which a diameter DB1 of a first outer ring raceway 10c is greater than a diameter of a second outer ring raceway 10b (DB1>DB2), a method is realized which facilitates the entry of a grinding tool 12 into an inner side of the outer ring when these both outer ring raceways 10c and 10b are subjected to a grinding process. As shown in (A) to (B), the grinding tool 12 is made to enter the inner side of the outer ring 2b through an opening on a side close to the first outer ring raceway 10c between the openings at both ends of this outer ring 2b. This resolves the above-described problem.
    Type: Application
    Filed: April 24, 2007
    Publication date: August 13, 2009
    Applicant: NSK LTD.
    Inventors: Shigemi Tsukamoto, Katsuyuki Kawamura, Hirohide Ishida, Tatsuo Wakabayashi
  • Publication number: 20080190775
    Abstract: A method is realized for easily performing, without using a masking tape, an operation to accurately form a coating film 31 only on a coated section (?8) partly formed on the surface of a hub main body 13a. The upper end face of a rubber closed end cylindrical masking cover 32 is elastically pressed against the outside end surface of a cylindrical section 16 forming the hub main body 13a. As a result a border section between the coated section (?8) and the portion adjacent to the coated section (?8) can be made liquid-tight. In this state, coating particles are electrodeposited on the coated section (?8) by bringing a coating liquid 28 discharged from a liquid supply tube 29 into contact with the coated section (?8). By adopting such a method, the problems can be solved.
    Type: Application
    Filed: June 20, 2007
    Publication date: August 14, 2008
    Inventors: Katsuyuki Kawamura, Yoshio Inoue, Satoru Endo, Hiroyuki Okuno
  • Patent number: 7321530
    Abstract: A decoder circuit of the present invention, mounted on an integrated circuit, decodes input voltage Vin supplied to a single external input terminal into three or more control outputs, and an object of the present invention is to reduce the size of a chip. The foregoing decoder circuit includes: a P-type transistor in which an emitter is connected to a power source line of high level, a base is connected to the external input terminal, and a collector is an output terminal of a first control output; and an N-type transistor in which an emitter is connected to a power source line of low level, a base is connected to the external input terminal, and a collector is an output terminal of a second control output, and decodes the control outputs to three or more sets of data by carrying out logic operations.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: January 22, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuyuki Kawamura, Yasuyuki Shirasaka
  • Publication number: 20070059577
    Abstract: A solid proton exchange membrane and a membrane-electrode assembly (MEA) for use in fabricating an inexpensive and efficient proton exchange fuel cell (PEFC) which enables direct use of an organic fuel without a reformer and use of hydrogen gas. In particular, an electrochemical cell including a solid electrolyte membrane made of one or plural kinds of layered silicate minerals or intercalation compounds. The layered silicate minerals can be easily fabricated into a solid electrolyte membrane which shows a “molecular sieve effect” on the target fuel if the density and impregnated liquid contents are properly controlled. The catalyst can be selected from a wide range of candidate materials. The use of the layered silicate mineral allows to fabricate an inexpensive direct methanol fuel cell (DMFC) and a realistic direct ethanol fuel cell (DEFC). Furthermore, an energy-efficient PEFC using hydrogen gas can also be produced therefrom.
    Type: Application
    Filed: October 20, 2003
    Publication date: March 15, 2007
    Inventors: Yasuaki Takeuchi, Satoru Suzuki, Katsuyuki Kawamura, Mitsuru Sano
  • Publication number: 20040264335
    Abstract: A decoder circuit of the present invention, mounted on an integrated circuit, decodes input voltage Vin supplied to a single external input terminal into three or more control outputs, and an object of the present invention is to reduce the size of a chip. The foregoing decoder circuit includes: a P-type transistor in which an emitter is connected to a power source line of high level, a base is connected to the external input terminal, and a collector is an output terminal of a first control output; and an N-type transistor in which an emitter is connected to a power source line of low level, a base is connected to the external input terminal, and a collector is an output terminal of a second control output, and decodes the control outputs to three or more sets of data by carrying out logic operations.
    Type: Application
    Filed: April 21, 2004
    Publication date: December 30, 2004
    Inventors: Katsuyuki Kawamura, Yasuyuki Shirasaka
  • Patent number: 6639345
    Abstract: To realize a high-quality flat-face type of color cathode ray tube by combining a tint panel with a pressed mask, the outer surface of the panel of the color cathode ray tube is made nearly flat and the inner surface of the panel is curved in a concave shape, and the long-length direction pitch of slots formed in an aperture region 2 of a pressed mask 1 to be disposed close to the inner surface and the connection-direction width of each of bridges which connect the slots are made different between a central portion (A) and a peripheral portion (B) in the apertured region 2 of the pressed mask 1, whereby the ratio of bridges per unit area is made larger in the central portion (A) than in the peripheral portion (B) or the opening rate of slots per unit area is made larger in the peripheral portion (B) than in the central portion (A).
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: October 28, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yuichi Inoue, Katsuyuki Kawamura
  • Publication number: 20030152015
    Abstract: A photoreceiver amplifier circuit has an amplifier for amplifying the detection signal of a photoreceiver device, a plurality of negative feedback circuits connected between the input terminal and the output terminal of the amplifier in parallel with one another so as to form different negative feedback loops, and a switch circuit for selecting one among the plurality of negative feedback circuits. The frequency band and/or the gain of the photoreceiver amplifier circuit is varied according to the detection signal of the photoreceiver device. This makes it possible to switch the frequency band without degradation in amplification characteristics.
    Type: Application
    Filed: February 5, 2003
    Publication date: August 14, 2003
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Katsuyuki Kawamura
  • Patent number: 6449832
    Abstract: A predetermined number of sprags 21 are consecutively inserted into sprag pockets 45 in a boss 44 on a rotary index table by a sprag inserting section 50. Then, a ribbon spring 22 is fitted to the boss 44 by a ribbon-spring fitting section 60, and an outer retainer 23 is fitted thereto by an outer-retainer fitting section 70. At the same time, the boss 44 is continuously rotated to move the sprags 21 radially outward by centrifugal force, thereby allowing the sprags 21 to be inserted and fitted into sprag inserting windows 28 and 30 of the ribbon spring 22 and the outer retainer 23. Further, an inner retainer 24 is fitted to the boss 44 by an inner-retainer fitting section 80 to insert and fit the sprags 21 into the sprag pockets 45 of the inner retainer 24.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 17, 2002
    Assignee: NSK Ltd.
    Inventor: Katsuyuki Kawamura
  • Patent number: 6448706
    Abstract: A color picture tube has a panel which is substantially flat on its outer surface, while an inner surface of the panel is curved, and a shadow mask having a curved plane with a curvature that is greater than that of the curved plane on the inner panel surface. The panel is made of glass, such as a tint material, a ring-like magnet assembly (PCM) for convergence adjustment is provided outside of the neck, a first electromagnetic quadrupole coil is further attached to a portion outside of the neck for causing an electron beam spacing to change or vary in accordance with the deflection angle, and a second electromagnetic quadrupole coil is attached to a deflection yoke. The distance between adjacent ones of three cathodes of an electron gun is determined to be greater than or equal to 6.0 millimeters (mm).
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: September 10, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Katsuyuki Kawamura, Yuichi Inoue, Hiroki Taga
  • Publication number: 20010020817
    Abstract: To realize a high-quality flat-face type of color cathode ray tube by combining a tint panel with a pressed mask, the outer surface of the panel of the color cathode ray tube is made nearly flat and the inner surface of the panel is curved in a concave shape, and the long-length direction pitch of slots formed in an aperture region 2 of a pressed mask 1 to be disposed close to the inner surface and the connection-direction width of each of bridges which connect the slots are made different between a central portion (A) and a peripheral portion (B) in the apertured region 2 of the pressed mask 1, whereby the ratio of bridges per unit area is made larger in the central portion (A) than in the peripheral portion (B) or the opening rate of slots per unit area is made larger in the peripheral portion (B) than in the central portion (A).
    Type: Application
    Filed: March 7, 2001
    Publication date: September 13, 2001
    Inventors: Yuichi Inoue, Katsuyuki Kawamura
  • Patent number: 6212485
    Abstract: A method for analyzing behavior of a structure made of a micro-inhomogeneous material, whose micro-structure includes plural constituent materials, and for optimally designing the micro-structure, uses a unified procedure of a molecular simulation method and a homogenization analysis.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: April 3, 2001
    Assignee: E.R.C. Co., Ltd.
    Inventors: Masashi Nakano, Katsuyuki Kawamura, Yasuaki Ichikawa
  • Patent number: 6151768
    Abstract: A predetermined number of sprags 21 are consecutively inserted into sprag pockets 45 in a boss 44 on a rotary index table by means of a sprag inserting section 50. Then, a ribbon spring 22 is fitted to the boss 44 by means of a ribbon-spring fitting section 50, and an outer retainer 23 is fitted to the boss 44 by means of an outer-retainer fitting section 70. At the same time, the boss 44 is continuously rotated to move the sprags 21 toward the radially outward side of the boss 44 by the centrifugal force acting in the sprags 21, thereby allowing the sprags 21 to be inserted and fitted into sprag inserting windows 28 and 30 of the ribbon spring 22 and the outer retainer 23. Further, an inner retainer 24 is fitted to the boss 44 by means of an inner-retainer fitting section 80 to insert and fit the sprags 21 into the sprag pockets 45 of the inner retainer 24.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: November 28, 2000
    Assignee: NSK Ltd.
    Inventor: Katsuyuki Kawamura
  • Patent number: 5421088
    Abstract: In a method of assembling a double-row ball bearing of a preload-type, which includes a step of inserting a plurality of balls in a crescent-shaped gap formed between an outer race and an inner race which is deviated with respect to the outer race, a step of distributing the balls between the outer and inner races at equal intervals, and a step of disposing the outer race and the inner race concentrically with respect to each other, a step of producing a temperature difference is performed before the step of distributing the balls at equal intervals. In the step of producing temperature difference, the outer race is heated by a heating coil surrounding the outer race to expand the outer race.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: June 6, 1995
    Assignee: Nippon Seiko Kabushiki Kaisha
    Inventor: Katsuyuki Kawamura