Patents by Inventor Hideo Koizumi

Hideo Koizumi 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: 8113155
    Abstract: A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: February 14, 2012
    Assignee: Husqvarna Zenoah Co., Ltd.
    Inventors: Takashi Ooniwa, Hideo Koizumi
  • Publication number: 20090050124
    Abstract: A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved.
    Type: Application
    Filed: March 6, 2007
    Publication date: February 26, 2009
    Applicant: Husqvarna Zehoah Co., Ltd
    Inventors: Takashi Ooniwa, Hideo Koizumi
  • Patent number: 5983951
    Abstract: A wear-resistant and corrosion-resistant loom part comprises a Fe--Cr based alloy or a Fe--Cr--Ni based alloy, which has a substantially dual-phase structure comprising a ferrite phase and a martensite phase. The Fe--Cr based alloy preferably contains 10 to 20% by weight Cr, and contains 5 to 70 volume % of the ferrite phase in its structure. The Fe--Cr--Ni based alloy preferably contains 10 to 30% by weight of Cr, 0.01 to 15% by weight of Ni, and 5 to 70 volume % of the ferrite phase in its structure. The maximum crystal particle diameter of the Fe--Cr based alloy or the Fe--Cr--Ni based alloy is preferably 20 .mu.m or less. The loom part is preferably formed of either a dent of a reed or a heddle.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: November 16, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junji Taniguchi, Kazuya Tsujimoto, Hideo Koizumi, Yasuhisa Shiraishi
  • Patent number: 5397682
    Abstract: Disclosed is a novel polyimide precursor having an aromatic polyamide ester structure containing amido groups and carboxylic acid ester groups composed of carboxylic groups and organic groups bonded thereto by ester linkage, wherein the ester groups comprise 20 to 80 mole %, based on the total molar amount of the ester groups, of groups each independently selected from the group consisting of a methyl group, an ethyl group, an n-propyl group, an isopropyl group and an allyl group and 20 to 80 mole %, based on the total molar amount of the ester groups, of organic groups each independently selected from organic groups having 4 to 11 carbon atoms and containing a terminal ethylenic double bond.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: March 14, 1995
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshio Matsuoka, Yoshiaki Kawai, Hideo Koizumi
  • Patent number: 5129125
    Abstract: A cleaning machine includes a frame having wheels, a suction blower having an inlet and an outlet mounted on the frame, an intake opening communicated with the inlet of the suction blower for sucking dirt containing relatively large dirt such as fallen leaves and relatively small dirt such as dust together with air, a main separator for separating the relatively large dirt, a subseparator for separating the relatively small dirt from the air having passed through the main separator, and a dirt receptacle made of an air-impermable material detachably attached under the main separator through a pivoting rod which is pivotably mounted to the frame so as to support the receptacle to the main separator and a clamp member for securing the dirt receptacle to the main separator.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: July 14, 1992
    Assignee: Komatsu Zenoah Company
    Inventors: Akira Gamou, Yoshiaki Kanoh, Shoji Sakai, Kenichi Osonoe, Akio Terai, Masayoshi Tsuchiya, Hideo Koizumi
  • Patent number: 4671696
    Abstract: A shaft assembly comprises a shaft having at least one small diameter portion located on the way in the axial direction thereof, and at least one member mounted to the outer periphery of the small diameter portion of the shaft rotatably and/or movably in the axial direction. The shaft assembly is produced by first forming the member on a large diameter portion of the shaft and then moving the member from the large diameter portion to the small diameter portion. The member moved to the small diameter portion is mounted to the small diameter portion rotatably and/or movably in the axial direction by the shrinkage thereof.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: June 9, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Suzuki, Hideo Koizumi, Jun Takeyama, Kunitsugu Tsukui
  • Patent number: 4531227
    Abstract: The invention provides a rotary anode which has a graphite body having a plurality of radial slits and a target layer adhered to the upper surface of the graphite body. The target layer is a single layer of tungsten or a tungsten alloy, or a composite layer consisting of the single layer and a molybdenum layer. In the manufacturing process and in use of the rotary anode, a thermal stress which occurs in the graphite body is decreased, thus preventing cracking of the graphite body. The invention also provides a method for manufacturing the rotary anode.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: July 23, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Yoshio Fukuhara, Hideo Koizumi
  • Patent number: 4514234
    Abstract: A molybdenum board which has excellent strength at high temperatures. The molybdenum board consists essentially of molybdenum recrystallized grains having a ratio L/W (L: length; W: width) of 2 or more and the width W of 5 to 1,000 .mu.m and containing 0.005 to 0.75% by weight of at least one element selected from Al, Si and K.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: April 30, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Yoshiharu Fukasawa, Tatsuhiko Matsumoto, Mituo Kawai, Shigeru Ueda, Hideo Koizumi, Hiroyuki Saitou
  • Patent number: 4482837
    Abstract: The present invention provides a rotary anode for an X-ray tube which comprises an anode body formed of graphite, a preformed sheet formed of rhenium and bonded to the top surface of the anode body, and a target layer formed of tungsten or an alloy thereof and bonded to the top surface of the preformed sheet. This rotary anode may further comprise a preformed plate formed of molybdenum and interposed between and bonded to the preformed sheet and the target layer. Also disclosed is a method for manufacturing the rotary anode.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: November 13, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hideo Koizumi, Isamu Koseki, Tadashi Morita, Shu Yamazaki, Yoshio Fukuhara
  • Patent number: 4430296
    Abstract: A molybdenum-based alloy improved in mechanical strength and hot workability, which consists of 0.01 to 5.0% by weight of vanadium, 10 to 100 ppm of boron, 10 to 1,000 ppm of carbon, and the balance of molybdenum.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: February 7, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hideo Koizumi, Hideo Ishihara, Tatsuhiko Matsumoto, Katsuhiko Kawakita
  • Patent number: 4168449
    Abstract: A rotary anode for an X-ray tube comprising an anode body formed of graphite, a target layer formed of tungsten or alloy thereof, and an intermediate layer containing rhenium and molybdenum, the intermediate layer being interposed between and bonded with the anode body and target layer. This rotary anode may be obtained by forming over a target area of the graphite anode body a paste layer containing rhenium powder and molybdenum powder, laminating over the paste layer a layer formed of tungsten or alloy thereof, and then hot-pressing the resultant laminated body under vacuum or in an inert gas by means of a pressure transmitting powder.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: September 18, 1979
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Hideo Koizumi, Shigeharu Nishino, Michiyasu Komatsu, Tadashi Miyano
  • Patent number: D638856
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: May 31, 2011
    Assignee: Husqvarna Zenoah Co., Ltd.
    Inventors: Hideo Koizumi, Takashi Nakamura