Patents by Inventor Tomoyuki Kojima

Tomoyuki Kojima 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: 11209765
    Abstract: A power supply device includes a rectification circuit that is supplied with AC power from an AC power supply, a power factor improvement circuit that boosts an output voltage of the rectification circuit, smooths a boosted voltage with a capacitor, and thereby generates a DC output voltage outputted to a load circuit, a DC-DC converter that steps down the DC output voltage to a prescribed first voltage, a DC output voltage detection circuit that detects whether or not the DC output voltage satisfies a prescribed condition, and a switch circuit that temporarily puts the power factor improvement circuit in an operating state by use of the first voltage each time the prescribed condition is satisfied in a period in which the power factor improvement circuit is in a stopped state due to an energy saving mode of the load circuit.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: December 28, 2021
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Tomoyuki Kojima, Taku Oryoji
  • Publication number: 20210099077
    Abstract: A power supply device includes a rectification circuit that is supplied with AC power from an AC power supply, a power factor improvement circuit that boosts an output voltage of the rectification circuit, smooths a boosted voltage with a capacitor, and thereby generates a DC output voltage outputted to a load circuit, a DC-DC converter that steps down the DC output voltage to a prescribed first voltage, a DC output voltage detection circuit that detects whether or not the DC output voltage satisfies a prescribed condition, and a switch circuit that temporarily puts the power factor improvement circuit in an operating state by use of the first voltage each time the prescribed condition is satisfied in a period in which the power factor improvement circuit is in a stopped state due to an energy saving mode of the load circuit.
    Type: Application
    Filed: September 18, 2020
    Publication date: April 1, 2021
    Applicant: Oki Data Corporation
    Inventors: Tomoyuki KOJIMA, Taku Oryoji
  • Patent number: 10720828
    Abstract: A power supply device includes a rectifying/smoothing circuit that receives an AC voltage input and converts the AC voltage into a DC voltage by rectification and smoothing, an AC voltage cut-off detection circuit that detects a cut-off of the AC voltage, and a voltage processing circuit that is connected to a post-stage of the rectifying/smoothing circuit wherein the post-stage means a downstream side from the rectifying/smoothing circuit and operates when the AC voltage cut-off detection circuit has detected a cut-off of the AC voltage. The AC voltage cut-off detection circuit is provided with a signal transmitting element that is connected to the post-stage of the rectifying/smoothing circuit, and receives power supplied from the rectifying/smoothing circuit and sends a signal to the voltage processing circuit when the AC voltage is cut off.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: July 21, 2020
    Assignee: Oki Data Corporation
    Inventors: Tomoyuki Kojima, Hideki Shinyama
  • Publication number: 20190267887
    Abstract: A power supply device includes a rectifying/smoothing circuit that receives an AC voltage input and converts the AC voltage into a DC voltage by rectification and smoothing, an AC voltage cut-off detection circuit that detects a cut-off of the AC voltage, and a voltage processing circuit that is connected to a post-stage of the rectifying/smoothing circuit wherein the post-stage means a downstream side from the rectifying/smoothing circuit and operates when the AC voltage cut-off detection circuit has detected a cut-off of the AC voltage. The AC voltage cut-off detection circuit is provided with a signal transmitting element that is connected to the post-stage of the rectifying/smoothing circuit, and receives power supplied from the rectifying/smoothing circuit and sends a signal to the voltage processing circuit when the AC voltage is cut off.
    Type: Application
    Filed: February 20, 2019
    Publication date: August 29, 2019
    Inventors: Tomoyuki KOJIMA, Hideki SHINYAMA
  • Patent number: 10281856
    Abstract: An image forming apparatus includes an image forming unit, first and second power terminals both coupled to a power supply, a fixing unit including a heater, a first switch, a first detector, a second switch, and a controller. The first switch includes a triac and is turned on and off on the basis of a first control signal. The first detector generates a first detection signal corresponding to the turning on and off of the first switch. The second switch includes a relay and is turned on and off on the basis of a second control signal. The controller generates the first control signal, and generates, on the basis of the first detection signal, the second control signal. Each of the heater, the first switch, and the second switch is provided in a power supply path that couples the first power terminal and the second terminal to each other.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: May 7, 2019
    Assignee: Oki Data Corporatian
    Inventor: Tomoyuki Kojima
  • Publication number: 20180314196
    Abstract: An image forming apparatus includes an image forming unit, first and second power terminals both coupled to a power supply, a fixing unit including a heater, a first switch, a first detector, a second switch, and a controller. The first switch includes a triac and is turned on and off on the basis of a first control signal. The first detector generates a first detection signal corresponding to the turning on and off of the first switch. The second switch includes a relay and is turned on and off on the basis of a second control signal. The controller generates the first control signal, and generates, on the basis of the first detection signal, the second control signal. Each of the heater, the first switch, and the second switch is provided in a power supply path that couples the first power terminal and the second terminal to each other.
    Type: Application
    Filed: April 20, 2018
    Publication date: November 1, 2018
    Inventor: Tomoyuki KOJIMA
  • Patent number: 9601891
    Abstract: A cable assembling apparatus for allowing a terminal and a electric wire to be accurately crimped and to resolve increase of facility cost incurred by separation of a press and a crimping machine, includes a press having a downside press mold having a plurality of types of dies arranged in parallel, an electric wire support jig arranged in parallel, having a metal plate guide at an end thereof entering into between the plurality of types of dies, and a feeder adapted to lift the electric wire support jig together with the metal plate above the dies of the downside press mold, and advance and descend the electric wire support jig to an adjacent die of next process. Furthermore, an electric wire chuck disposed in a midstream die of the plurality of types of dies and supplying the electric wire support jig with the electric wire is disposed.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: March 21, 2017
    Assignee: Yazaki Corporation
    Inventors: Yasuto Yamauchi, Keisuke Matsuura, Tomoyuki Kojima, Yuusuke Yamamoto
  • Publication number: 20140000102
    Abstract: A cable assembling apparatus for allowing a terminal and a electric wire to be accurately crimped and to resolve increase of facility cost incurred by separation of a press and a crimping machine, includes a press having a downside press mold having a plurality of types of dies arranged in parallel, an electric wire support jig arranged in parallel, having a metal plate guide at an end thereof entering into between the plurality of types of dies, and a feeder adapted to lift the electric wire support jig together with the metal plate above the dies of the downside press mold, and advance and descend the electric wire support jig to an adjacent die of next process. Furthermore, an electric wire chuck disposed in a midstream die of the plurality of types of dies and supplying the electric wire support jig with the electric wire is disposed.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: Yazaki Corporation
    Inventors: Yasuto Yamauchi, Keisuke Matsuura, Tomoyuki Kojima, Yuusuke Yamamoto
  • Patent number: 7931042
    Abstract: A vacuum suction system comprises a work conveyor table 2 having work receiving openings 5, and a table base 3 having vacuum suction channels 7 which communicate with the work receiving openings 5 of the conveyor table 2. The work receiving openings 5 and the vacuum suction channels 7 communicate with a vacuum generation source 17 via a vacuum pipe 9. A negative pressure sensor 10 is disposed on the vacuum pipe 9. Based on a signal from the negative pressure sensor 10, a compressed air generation source 20 supplies a compressed air to the vacuum pipe 9 and thereby stabilizes the vacuum level in the vacuum pipe 9.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: April 26, 2011
    Assignee: Tokyo Weld Co., Ltd.
    Inventors: Tomoyuki Kojima, Shigeru Matsukawa, Hiroaki Abe
  • Patent number: 7603073
    Abstract: An image forming apparatus includes an image supporting member; a belt; a belt drive unit for rotating the belt; an acceleration and deceleration information storage unit; and a belt speed control unit. The belt speed control unit determines a difference between a first moving amount corresponding to rotations of the image supporting member from a stationary state thereof to a specific speed and a second moving amount corresponding to rotations of the belt from a stationary state thereof to the specific speed. The belt speed control unit controls the belt drive unit, so that a third moving amount corresponding to rotations of the belt from the specific speed to the stationary state thereof becomes larger than a fourth moving amount corresponding to rotations of the image supporting member from the specific speed to the stationary state thereof according to the difference.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: October 13, 2009
    Assignee: Oki Data Corporation
    Inventor: Tomoyuki Kojima
  • Patent number: 7435899
    Abstract: A corrugated tube, an apparatus and method for perforating the corrugated tube. The corrugated tube includes a tubular body having large and small diameter portions and a longitudinal slit formed along a generating line of the tube body. The tube includes a communication hole formed generally in the large-diameter portions. A tube guide is provided in the apparatus for guiding the tubular body during the process of forming the perforations.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: October 14, 2008
    Assignee: Yazaki Corporation
    Inventors: Yoshitaka Okada, Hiromi Sugimoto, Kyoichi Yamamoto, Hideyuki Kaneda, Tomoyuki Kojima
  • Patent number: 7395012
    Abstract: A drum/belt drive starting procedure simultaneous starts the rotation of photosensitive drums and the conveyance of a belt. A drum/belt driving time calculating procedure sets a rotational drive stop time of each photosensitive drum and a conveyance drive stop time of the conveying belt on the basis of a detection result of a reference mark detecting unit. A drum/belt drive stopping procedure stops the rotation of each photosensitive drum and the conveyance of the conveying belt on the basis of a calculation result of the drum/belt driving time calculating procedure. Rotational phase differences of every plural photosensitive drums are set to a predetermined value in the state where rubbing with the belt is small.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: July 1, 2008
    Assignee: Oki Data Corporation
    Inventor: Tomoyuki Kojima
  • Publication number: 20080075508
    Abstract: An image forming apparatus includes an image supporting member; a belt; a belt drive unit for rotating the belt; an acceleration and deceleration information storage unit; and a belt speed control unit. The belt speed control unit determines a difference between a first moving amount corresponding to rotations of the image supporting member from a stationary state thereof to a specific speed and a second moving amount corresponding to rotations of the belt from a stationary state thereof to the specific speed. The belt speed control unit controls the belt drive unit, so that a third moving amount corresponding to rotations of the belt from the specific speed to the stationary state thereof becomes larger than a fourth moving amount corresponding to rotations of the image supporting member from the specific speed to the stationary state thereof according to the difference.
    Type: Application
    Filed: September 6, 2007
    Publication date: March 27, 2008
    Inventor: Tomoyuki Kojima
  • Publication number: 20070102182
    Abstract: To provide a corrugated tube and an apparatus for and method of perforating a corrugated tube, which are capable of rapidly discharging water, such as water intruding into the inside and condensation water, to the outside and in which a plurality of communication holes can be positively and efficiently formed respectively in predetermined portions of a peripheral surface of a tube body. For example, a wire harness or the like is inserted into a corrugated tube 10 through a slit 12 formed in a tube body 11 of a tubular shape along a generating line of the tube body, the tube body having larger-diameter portions 20 and smaller-diameter portions 30 which are arranged alternatively along the same axis. Usually, the corrugated tube 10, receiving the wire harness therein, is installed in such a manner that the slit 12 is disposed at a lower side, but there arises the case where the slit 12 can not be disposed at the lower side because of the installation direction and a change of the direction.
    Type: Application
    Filed: March 3, 2005
    Publication date: May 10, 2007
    Inventors: Yoshitaka Okada, Hiromi Sugimoto, Kyoichi Yamamoto, Hideyuki Kaneda, Tomoyuki Kojima
  • Patent number: 7119299
    Abstract: A work inspection system 2 includes: a conveyor table 7 vertically positioned, and conveying works W stored in work-storing pockets 9; a work inspection apparatus for inspecting the works stored in the work-storing pockets 9 of the conveyor table 7; and a sorting and ejecting apparatus 12 for sorting the inspected works stored in the work-storing pockets of the conveyor table in accordance with a property of the works and ejecting the same. The work-storing pockets 9 of the conveyor table 7 are positioned inside the periphery 7a of the conveyor table 7 to surround the works W. The work-storing pockets 9 are disposed along two concentric circles on the conveyor table 7.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: October 10, 2006
    Assignee: Tokyo Weld Co., Ltd.
    Inventors: Tomoyuki Kojima, Hiroaki Abe, Shigeru Matsukawa, Takahiko Iwazaki, Takayuki Yamauchi
  • Patent number: 6988609
    Abstract: A work measurement apparatus 1 comprises a base 2 and a conveyor table 3 which is slidably disposed on the base 2 and includes a work receiving opening 6. A guide plate 4 is fixedly disposed on the conveyor table 3. A guide entrance 5 is disposed in the guide plate 4 at the upper end of the work receiving opening 6. A measurement probe 8 is disposed on the upper side of the guide plate 4. The measurement probe 8 is urged towards the work W in the work receiving opening 6. The measurement probe 8 slides on the guide plate 4 as the conveyor table 3 is rotated. The measurement probe 8 is then directed by the guide entrance 5 to the work W in the work receiving opening 6 and makes contact with the work W. The measurement probe 8 exits from the guide entrance 5.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: January 24, 2006
    Assignee: Tokyo Weld Co., Ltd.
    Inventor: Tomoyuki Kojima
  • Publication number: 20050271418
    Abstract: A drum/belt drive starting procedure simultaneous starts the rotation of photosensitive drums and the conveyance of a belt. A drum/belt driving time calculating procedure sets a rotational drive stop time of each photosensitive drum and a conveyance drive stop time of the conveying belt on the basis of a detection result of a reference mark detecting unit. A drum/belt drive stopping procedure stops the rotation of each photosensitive drum and the conveyance of the conveying belt on the basis of a calculation result of the drum/belt driving time calculating procedure. Rotational phase differences of every plural photosensitive drums are set to a predetermined value in the state where rubbing with the belt is small.
    Type: Application
    Filed: June 3, 2005
    Publication date: December 8, 2005
    Inventor: Tomoyuki Kojima
  • Patent number: 6897172
    Abstract: The present invention provides a dielectric ceramic composition comprising: 30 to 90% by weight of a crystallized glass powder capable of depositing a diopside crystal, 1 to 40% by weight of a calcium titanate powder, a strontium titanate powder or a mixed powder thereof, and 0 to 60% by weight of at least one kind of a powder selected from the group consisting of Al2O3, TiO2, ZrO2, MgTiO3, BaTi4O9, La2Ti2O7, Nd2Ti2O7, Ca2Nb2O7, SrZrO3 and CaZrO3, and a dielectric ceramics obtained by firing the same.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: May 24, 2005
    Assignee: Kyocera Corporation
    Inventors: Tatsuji Furuse, Seiichiro Hirahara, Shuji Nakazawa, Yasushi Ode, Tomoyuki Kojima, Fumiaki Sekine, Hiroshi Makino, Manabu Yonekura
  • Publication number: 20040163927
    Abstract: A work measurement apparatus 1 comprises a base 2 and a conveyor table 3 which is sidably disposed on the base 2 and includes a work receiving opening 6. A guide plate 4 is fixedly disposed on the conveyor table 3. A guide entrance 5 is disposed in the guide plate 4 at the upper end of the work receiving opening 6. A measurement probe 8 is disposed on the upper side of the guide plate 4. The measurement probe 8 is urged towards the work W in the work receiving opening 6. The measurement probe 8 slides on the guide plate 4 as the conveyor table 3 is rotated. The measurement probe 8 is then directed by the guide entrance 5 to the work W in the work receiving opening 6 and makes contact with the work W. The measurement probe 8 exits from the guide entrance 5.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventor: Tomoyuki Kojima
  • Patent number: D543333
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: May 22, 2007
    Assignee: Tokyo Weld Co., Ltd.
    Inventor: Tomoyuki Kojima