Patents by Inventor Hirokazu Kawai

Hirokazu Kawai 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: 20190105724
    Abstract: A power supply system includes multiple power supply devices including a first power supply device and a second power supply device that are connected in common to a load. The first power supply device calculates control information for controlling voltage or current to be output to the load and controls the output to the load based on the calculated control information while transmitting the control information to the second power supply device. The second power supply device receives the control information and controls the output to the load based on the received control information while detecting current to be output from its own device to the load and transmitting current information to the first power supply device. The first power supply device receives the current information transmitted from the second power supply device and calculates control information based on the received current information and the current and voltage detected by its own device.
    Type: Application
    Filed: May 23, 2017
    Publication date: April 11, 2019
    Inventors: Hirokazu Kawai, Songjie Hou, Hideo Shiozaki, Haruhiko Manabe, Satoru Hata, Hiroyasu Mondori, Kazuki Yoshida
  • Publication number: 20190039163
    Abstract: A power supply system includes multiple power supply devices connected in common to a load. A first power supply device calculates control information for controlling voltage or current to be output to the load and controls the output to the load based on the calculated control information while transmitting the control information to a second power supply device. The second power supply device receives the control information transmitted from the first power supply device and control the output to the load based on the received control information while detecting current to be output from its own device to the load and transmitting current information to the first power supply device. The first power supply device receives the current information transmitted from the second power supply device and calculate control information based on the received current information and the current and voltage detected by its own device.
    Type: Application
    Filed: December 29, 2016
    Publication date: February 7, 2019
    Inventors: Hirokazu KAWAI, Songjie HOU, Hideo SHIOZAKI, Haruhiko MANABE, Satoru HATA, Hiroyasu MONDORI, Futoshi NISHISAKA, Takanori ONISHI
  • Publication number: 20190015922
    Abstract: An arc welding system of a consumable electrode type comprises: a wire feeding device that feeds welding wire from a wire feeding source to a welding torch; and a power supply device that supplies electric power between the welding wire fed to the welding torch and a base material, the system being configured to weld the base material by arc generated by the supplied electric power. The wire feeding device is provided with: an intermediate wire feeding source that is disposed between the wire feeding source and the welding torch and is configured to temporarily accommodate the welding wire fed from the wire feeding source and to feed the accommodated welding wire to the welding torch; a pull-out feeding part that feeds the welding wire at the wire feeding source to the intermediate wire feeding source; and a push-out feeding part that feeds the welding wire accommodated in the intermediate wire feeding source to the welding torch.
    Type: Application
    Filed: March 9, 2017
    Publication date: January 17, 2019
    Inventors: Masahiro Inoue, Yukiya Morita, Hisao Miyahara, Hirokazu Kawai, Songjie Hou, Hayato Baba, Hideo Shiozaki, Tetsuo Era, Tomoyuki Ueyama
  • Patent number: 8674702
    Abstract: A lithium-ion secondary battery includes an aluminum case, an electrolytic solution, a positive plate, a negative plate, a positive terminal, a negative terminal, and voltage sensors. The positive terminal and the negative terminal project to the outside of the case while being insulated from the case. The voltage sensor is connected between the case and the positive terminal and detects the potential of the positive terminal with respect to a potential VR of the case. The voltage sensor is connected between the case and the negative terminal and detects the potential of the negative terminal with respect to the potential VR of the case. From the detected results, the states of the positive plate and the negative plate are separately detected.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: March 18, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Panasonic EV Energy Co., Ltd.
    Inventors: Hirokazu Kawai, Yuichi Ibi, Kunio Kanamaru
  • Patent number: 8142919
    Abstract: A battery pack apparatus including at least one battery assembly, a plurality of medium feeding parts for adjusting temperatures of the battery assembly, at least one temperature detector, a storage unit, and a controller. The storage unit stores a relation between a temperature of the battery assembly and a revolution level of the medium feeding parts. The controller reads out a revolution level corresponding to the detected temperature of the battery assembly from the storage unit, and allocates the revolution level to the medium feeding parts. The controller changes the value of the revolution levels allocated to the respective medium feeding parts based on the allocated revolution levels so that any one of the revolution levels of the plurality of the medium feeding parts is different from the other revolution levels thereof, and controls the plurality of medium feeding parts at changed revolution levels.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: March 27, 2012
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventors: Hirokazu Kawai, Takaki Kobayashi, Jun Okuda
  • Publication number: 20110177264
    Abstract: A web (12) has resin coat layers (46, 47) on both surfaces of a base material (45), and one of the resin coat layer (47) is covered with an ink receiving layer (48). The web (12) is slit into narrow recording papers (14) by a slitter (13). This slitter (13) includes an upper rotary blade (21) having a sharp cutting edge, and a lower rotary blade (19) having a support (61) for the ink receiving layer (48) . After the slitting with the slitter (13), a cut face has a cross section in which one of the base material (45), the resin coat layer (47) and the ink receiving layer (47) projects outward relative to the resin coat layer (46).
    Type: Application
    Filed: September 18, 2009
    Publication date: July 21, 2011
    Applicant: FUJIFILM CORPORATION
    Inventor: Hirokazu Kawai
  • Publication number: 20100308834
    Abstract: A lithium-ion secondary battery includes an aluminum case, an electrolytic solution, a positive plate, a negative plate, a positive terminal, a negative terminal, and voltage sensors. The positive terminal and the negative terminal project to the outside of the case while being insulated from the case. The voltage sensor is connected between the case and the positive terminal and detects the potential of the positive terminal with respect to a potential VR of the case. The voltage sensor is connected between the case and the negative terminal and detects the potential of the negative terminal with respect to the potential VR of the case. From the detected results, the states of the positive plate and the negative plate are separately detected.
    Type: Application
    Filed: September 16, 2008
    Publication date: December 9, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, PANASONIC EV ENERGY CO., LTD.
    Inventors: Hirokazu Kawai, Yuichi Ibi, Kunio Kanamaru
  • Patent number: 7713580
    Abstract: The invention relates to a manufacturing method of an image recording medium wherein during the process of cutting a long roll body of the medium into sheet like product the curl tendency, a cause of poor printer feedability, is removed, and at the same time the generation of cracking in a recording layer is suppressed. In the manufacturing method a web of a long roll body, a sheet like material of a paper substrate with thermoplastic resin layers formed on both surfaces one of which also has a recording layer with the long roll body wound such that this recording layer surface is on the outside, is unwound into a cutting device whilst at the same time a straightening element of a roller of diameter between 8 mm and 16 mm is pressed against the side of the recording layer with a wrap angle that is less than 60 degrees.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: May 11, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Hiroshi Yamamoto, Hirokazu Kawai
  • Publication number: 20100071980
    Abstract: An electric power storage apparatus provided in a cabin includes a battery pack for storing electric power, and an air inlet duct for cooling the battery pack. The air inlet duct is formed to extend in the front-back direction of the car body. The air inlet duct includes an air inlet port formed in its end portion in the front-back direction of the car body and located within the cabin. The air inlet port is formed to let the air flow in a direction substantially perpendicular to the front-back direction of the car body.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 25, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jun Kokaji, Hirokazu Kawai
  • Patent number: 7654182
    Abstract: A discoid lower blade and a discoid upper blade, having a sharper knife angle compared with that of the lower blade, are arranged such that rotational axes thereof are parallel to each other, and portions of the blades overlap one another in the direction that the rotational axes extend. A sheet with a coating layer on one side is fed through and shear-cut between the upper and lower blades in the direction perpendicular to the rotational axes, with the surface of the sheet opposite the coating layer in contact with a periphery of the lower blade while the blades are rotated. When the sheet is shear-cut, a contact start position, where contact between the sheet and the upper blade starts, is positioned upstream in the feed direction of the sheet but outside a contacting area of the sheet, where the sheet contacts the periphery of the lower cutting blade.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: February 2, 2010
    Assignee: Fujifilm Corporation
    Inventor: Hirokazu Kawai
  • Patent number: 7573238
    Abstract: A voltage detection device for accurately correcting detection errors with voltage greater than an internal reference voltage. The device includes a first switch group of switches for obtaining the voltage across a battery block in a battery pack. A charge-discharge unit has two or more capacitors connected in series or in parallel. A voltage detector detects discharge voltage of the capacitors. In a first period, the capacitors are series-connected and charged with the voltage of the battery block. In a second period, the capacitors charged in the first period are series-connected and discharged, and the voltage detector detects the discharge voltage. In a third period, the capacitors are parallel-connected and each capacitor is charged with an internal reference voltage. In the fourth period, the capacitors charged in the third period are series-connected and discharged, and the detection error is corrected using the discharge voltage as a reference.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: August 11, 2009
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventor: Hirokazu Kawai
  • Publication number: 20090128158
    Abstract: A voltage detection device for accurately correcting detection errors with voltage greater than an internal reference voltage. The device includes a first switch group of switches for obtaining the voltage across a battery block in a battery pack. A charge-discharge unit has two or more capacitors connected in series or in parallel. A voltage detector detects discharge voltage of the capacitors. In a first period, the capacitors are series-connected and charged with the voltage of the battery block. In a second period, the capacitors charged in the first period are series-connected and discharged, and the voltage detector detects the discharge voltage. In a third period, the capacitors are parallel-connected and each capacitor is charged with an internal reference voltage. In the fourth period, the capacitors charged in the third period are series-connected and discharged, and the detection error is corrected using the discharge voltage as a reference.
    Type: Application
    Filed: August 8, 2006
    Publication date: May 21, 2009
    Applicant: PANASONIC EV ENERGY CO., LTD.
    Inventor: Hirokazu Kawai
  • Publication number: 20060259817
    Abstract: A battery pack apparatus including at least one battery assembly, a plurality of medium feeding parts for adjusting temperatures of the battery assembly, at least one temperature detector, a storage unit, and a controller. The storage unit stores a relation between a temperature of the battery assembly and a revolution level of the medium feeding parts. The controller reads out a revolution level corresponding to the detected temperature of the battery assembly from the storage unit, and allocates the revolution level to the medium feeding parts. The controller changes the value of the revolution levels allocated to the respective medium feeding parts based on the allocated revolution levels so that any one of the revolution levels of the plurality of the medium feeding parts is different from the other revolution levels thereof, and controls the plurality of medium feeding parts at changed revolution levels.
    Type: Application
    Filed: April 25, 2006
    Publication date: November 16, 2006
    Applicant: PANASONIC EV ENERGY CO., LTD
    Inventors: Hirokazu Kawai, Takaki Kobayashi, Jun Okuda
  • Publication number: 20050281964
    Abstract: The invention relates to a manufacturing method of an image recording medium wherein during the process of cutting a long roll body of the medium into sheet like product the curl tendency, a cause of poor printer feedability, is removed, and at the same time the generation of cracking in a recording layer is suppressed. In the manufacturing method a web of a long roll body, a sheet like material of a paper substrate with thermoplastic resin layers formed on both surfaces one of which also has a recording layer with the long roll body wound such that this recording layer surface is on the outside, is unwound into a cutting device whilst at the same time a straightening element of a roller of diameter between 8 mm and 16 mm is pressed against the side of the recording layer with a wrap angle that is less than 60 degrees.
    Type: Application
    Filed: June 22, 2005
    Publication date: December 22, 2005
    Inventors: Hiroshi Yamamoto, Hirokazu Kawai
  • Publication number: 20050270357
    Abstract: A preparation method for an inkjet recording paper obtained by cutting an inkjet recording sheet which has been formed in advance with an image wherein cutting is carried out by: providing a surface of the inkjet recording sheet before cutting with a cut location mark; detecting the cut location mark using a reading sensor; and cutting the inkjet recording sheet.
    Type: Application
    Filed: June 3, 2005
    Publication date: December 8, 2005
    Inventor: Hirokazu Kawai
  • Patent number: 6919707
    Abstract: A method for controlling and addressing a battery power source device having a plurality of battery pack systems connected in parallel or serially in parallel, each battery pack system having a battery pack block and a battery ECU connected thereto, is provided. The battery ECUs are connected to each other over communication lines, and a plurality of address setting terminals and address lines are connected to each other differently to provide a unique address to each battery ECU. When an abnormal state is detected in one of the battery pack blocks over the communication line, control is provided to the abnormal one of the battery pack blocks, identified by its address, to turn off its open/close relay contact to disconnect it from the parallel or the serial parallel connection, thereby preventing the function of the entire battery power source device from being stopped or degraded.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: July 19, 2005
    Assignee: Panasonic EV Energy Co., Ltd.
    Inventors: Hirokazu Kawai, Masahiro Kadono
  • Publication number: 20040255743
    Abstract: A discoid lower blade and a discoid upper blade, having a sharper knife angle compared with that of the lower blade, are arranged such that rotational axes thereof are parallel to each other, and portions of the blades overlap one another in the direction that the rotational axes extend. A sheet with a coating layer on one side is fed through and shear-cut between the upper and lower blades in the direction perpendicular to the rotational axes, with the surface of the sheet opposite the coating layer in contact with a periphery of the lower blade while the blades are rotated. When the sheet is shear-cut, a contact start position, where contact between the sheet and the upper blade starts, is positioned upstream in the feed direction of the sheet but outside a contacting area of the sheet, where the sheet contacts the periphery of the lower cutting blade.
    Type: Application
    Filed: June 17, 2004
    Publication date: December 23, 2004
    Inventor: Hirokazu Kawai
  • Patent number: 6612100
    Abstract: A protective cover that is pre-folded by a protective cover pre-folding apparatus is supplied to a pack producing apparatus. After sheets are stacked on the protective cover, the protective cover is fully folded onto the sheets to produce a pack, which is then inserted into a bag to produce a package. The package is then delivered from a package stacking apparatus.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: September 2, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideyuki Morimoto, Hirokazu Kawai, Yuji Okabe, Yasushi Kikuchi, Masao Tsuruta, Takao Asakura
  • Publication number: 20030129457
    Abstract: A method for controlling and addressing a battery power source device having a plurality of battery pack systems connected in parallel or serially in parallel, each battery pack system having a battery pack block and a battery ECU connected thereto, is provided. The battery ECUs are connected to each other over communication lines, and a plurality of address setting terminals and address lines are connected to each other differently to provide a unique address to each battery ECU. When an abnormal state is detected in one of the battery pack blocks over the communication line, control is provided to the abnormal one of the battery pack blocks, identified by its address, to turn off its open/close relay contact to disconnect it from the parallel or the serial parallel connection, thereby preventing the function of the entire battery power source device from being stopped or degraded.
    Type: Application
    Filed: December 31, 2002
    Publication date: July 10, 2003
    Applicant: PANASONIC EV ENERGY CO., LTD.
    Inventors: Hirokazu Kawai, Masahiro Kadono
  • Patent number: 4496824
    Abstract: A method and circuit for controlling the temperature of heat generating elements of a thermal transfer type thermal printing head is presented. The temperature of the thermal printing head is compared with preset low and high temperatures, within this range a normal thermal printing is effected. When the printer head temperature is high above the high preset temperature, a blower is energized in order to air-cool the printer head surface. When the printer head temperature goes lower than the preset low temperature, then the printing head is lifted up apart from the platen and thereafter all of the heat generating elements are heated up. The latter heating operation can be carried out prior to the start of the thermal transfer operation or during the thermal transfer operation by intermittently halting the operation.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: January 29, 1985
    Assignees: Shinko Electric Co., Ltd., Kanzaki Paper Mfg., Co., Ltd.
    Inventors: Hirokazu Kawai, Fumio Takahashi