Patents by Inventor Koichi Umezawa

Koichi Umezawa 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: 9061597
    Abstract: An object of the present invention is to provide a quick charger for an electric vehicle in which a quick charging cable can be compactly stored, which is excellent in safety, and in which the burden on a user in operations is lightened. Provided is a quick charger for an electric vehicle including: an operation panel provided on the front face of a body housing; an outlet for a charging cable provided on one side face of the body housing; a charging connector housing unit that is provided on the other side face of the body housing to hold a charging connector in the body housing; and a charging cable receiver that is provided at a lower part of the body housing, wherein the charging cable receiver has a function of holding an intermediate part of the charging cable.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: June 23, 2015
    Assignee: HITACHI, LTD.
    Inventors: Masaru Oda, Koichi Umezawa, Toshiyuki Utsuki, Yoshitomo Sakayori, Shoji Kawai, Masakatsu Horii
  • Publication number: 20130069588
    Abstract: An object of the present invention is to provide a quick charger for an electric vehicle in which a quick charging cable can be compactly stored, which is excellent in safety, and in which the burden on a user in operations is lightened. Provided is a quick charger for an electric vehicle including: an operation panel provided on the front face of a body housing; an outlet for a charging cable provided on one side face of the body housing; a charging connector housing unit that is provided on the other side face of the body housing to hold a charging connector in the body housing; and a charging cable receiver that is provided at a lower part of the body housing, wherein the charging cable receiver has a function of holding an intermediate part of the charging cable.
    Type: Application
    Filed: August 6, 2012
    Publication date: March 21, 2013
    Applicant: HITACHI, LTD.
    Inventors: Masaru ODA, Koichi UMEZAWA, Toshiyuki UTSUKI, Yoshitomo SAKAYORI, Shoji KAWAI, Masakatsu HORII
  • Patent number: 7276099
    Abstract: An object of the present invention is to provide an electric vacuum cleaner equipped with a compact and easy-to-operate cyclonic separation type dust collector. To accomplish the object, the present invention mounts a cyclonic separation cylinder (104) that centrifugally separates and captures dust and a dust collecting case (105) that contains a first auxiliary filter (106) detachably on the lower case (101) of the cleaner body (1) and part of air from the cyclonic separation cylinder (104) is fed to the motor-driven blower through the dust collecting case (105). The present invention mounts a cyclonic separation cylinder (104) that centrifugally separates and captures dust and a dust collecting case (105) that contains a first auxiliary filter (106) detachably on the lower case (101) of the cleaner body (1) and part of air from the cyclonic separation cylinder (104) is fed to the motor-driven blower through the dust collecting case (105) and a filter provided under it.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: October 2, 2007
    Assignee: Hitachi Home & Life Solutions, Inc.
    Inventors: Shoji Hayashi, Yukiji Iwase, Yasuyuki Hiruta, Kyouichi Kanno, Susumu Sato, Naofumi Kitagawa, Naruhiko Suzuki, Yasunori Kotaka, Hirofumi Tanaka, Koichi Umezawa
  • Patent number: 7207083
    Abstract: The electric vacuum cleaner is disclosed which includes a main body within which an electric blower and cyclonic separation cylinder are provided. A dust collecting case is provided in communication with the cyclonic separation cylinder to receive dust that has been separated from the inlet tube. The dust collecting case also includes a lifter arranged therein. Air received from the inlet tube is separated such that a portion is passed through the dust collecting case and a communicating passage. The air is subsequently merged and discharge through the electric blower.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: April 24, 2007
    Assignee: Hitachi Home & Life Solutions, Inc.
    Inventors: Shoji Hayashi, Yukiji Iwase, Yasuyuki Hiruta, Kyouichi Kanno, Susumu Sato, Naofumi Kitagawa, Naruhiko Suzuki, Yasunori Kotaka, Hirofumi Tanaka, Koichi Umezawa
  • Patent number: 7152978
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Hitachi, Ltd., and Hitachi Video and Information Systems, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Publication number: 20060218744
    Abstract: The electric vacuum cleaner is disclosed which includes a main body within which an electric blower and cyclonic separation cylinder are provided. A dust collecting case is provided in communication with the cyclonic separation cylinder to receive dust that has been separated from the inlet tube. The dust collecting case also includes a filter arranged therein. Air received from the inlet tube is separated such that a portion is passed through the dust collecting case and a communicating passage. The air is subsequently merged and discharge through the electric blower.
    Type: Application
    Filed: May 31, 2006
    Publication date: October 5, 2006
    Inventors: Shoji Hayashi, Yukiji Iwase, Yasuyuki Hiruta, Kyouichi Kanno, Susumu Sato, Naofumi Kitagawa, Naruhiko Suzuki, Yasunori Kotaka, Hirofumi Tanaka, Koichi Umezawa
  • Publication number: 20060123751
    Abstract: An object of the present invention is to provide an electric vacuum cleaner equipped with a compact and easy-to-operate cyclonic separation type dust collector. To accomplish the object, the present invention mounts a cyclonic separation cylinder (104) that centrifugally separates and captures dust and a dust collecting case (105) that contains a first auxiliary filter (106) detachably on the lower case (101) of the cleaner body (1) and part of air from the cyclonic separation cylinder (104) is fed to the motor-driven blower through the dust collecting case (105). The present invention mounts a cyclonic separation cylinder (104) that centrifugally separates and captures dust and a dust collecting case (105) that contains a first auxiliary filter (106) detachably on the lower case (101) of the cleaner body (1) and part of air from the cyclonic separation cylinder (104) is fed to the motor-driven blower through the dust collecting case (105) and a filter provided under it.
    Type: Application
    Filed: February 14, 2006
    Publication date: June 15, 2006
    Inventors: Shoji Hayashi, Yukiji Iwase, Yasuyuki Hiruta, Kyouichi Kanno, Susumu Sato, Naofumi Kitagawa, Naruhiko Suzuki, Yasunori Kotaka, Hirofumi Tanaka, Koichi Umezawa
  • Publication number: 20050083490
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 21, 2005
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Patent number: 6824273
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: November 30, 2004
    Assignees: Hitachi, Ltd., Hitachi Video Information System, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Patent number: 6783245
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: August 31, 2004
    Assignees: Hitachi Ltd., Hitachi Video and Information System, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Publication number: 20030226232
    Abstract: An object of the present invention is to provide an electric vacuum cleaner equipped with a compact and easy-to-operate cyclonic separation type dust collector.
    Type: Application
    Filed: February 25, 2003
    Publication date: December 11, 2003
    Inventors: Shoji Hayashi, Yukiji Iwase, Yasuyuki Hiruta, Kyouichi Kanno, Susumu Sato, Naofumi Hitagawa, Naruhiko Suzuki, Yasunori Kotaka, Hirofumi Tanaka, Koichi Umezawa
  • Publication number: 20030206276
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Application
    Filed: April 25, 2003
    Publication date: November 6, 2003
    Applicants: Hitachi, Ltd., Hitachi Video and Information System, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, MIkiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Patent number: 6290360
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: September 18, 2001
    Assignees: Hitachi, Ltd., Hitachi Video and Information System, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Publication number: 20010008439
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Application
    Filed: February 26, 2001
    Publication date: July 19, 2001
    Applicant: Hitachi, Ltd.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Patent number: D669026
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: October 16, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Masaru Oda, Koichi Umezawa, Toshiyuki Utsuki, Yoshitomo Sakayori, Shoji Kawai, Masakatsu Horii
  • Patent number: D690694
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: October 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Toshiyuki Utsuki, Sayuri Hashizume, Koichi Umezawa, Kenta Kumagai, Chikazu Yokoi, Yoshikatsu Kasahara
  • Patent number: D730894
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: June 2, 2015
    Assignee: HITACHI, LTD.
    Inventors: Junpei Hokari, Toshiyuki Utsuki, Koichi Umezawa, Kenta Kumagai, Chikazu Yokoi, Yoshikatsu Kasahara
  • Patent number: D733134
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: June 30, 2015
    Assignee: HITACHI, LTD.
    Inventors: Toshiyuki Utsuki, Junpei Hokari, Koichi Umezawa, Kenta Kumagai, Yoshikatsu Kasahara, Kenichi Miyamoto
  • Patent number: D733135
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: June 30, 2015
    Assignee: HITACHI, LTD.
    Inventors: Toshiyuki Utsuki, Junpei Hokari, Koichi Umezawa, Kenta Kumagai, Manabu Yamagata, Toru Kobayashi
  • Patent number: D809409
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: February 6, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Ishibashi, Koichi Umezawa, Masuyoshi Yamada, Hironori Wakana, Minoru Sakairi