Patents by Inventor Akira Doi

Akira Doi 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: 20020039626
    Abstract: The present invention provides a plasma CVD method for forming a plasma from a deposition material gas by application of an electric power, and thereby forming a film on a deposition target object in the plasma, wherein the formation of the plasma from the material gas is performed by applying an RF power and a DC power, and the DC power is applied to an electrode carrying the deposition target object. The present invention also provides a plasma CVD apparatus for forming a plasma from a deposition material gas by applying an electric power from the power applying means, and thereby forming a film on a deposition target object by exposing the deposition target object to the plasma, wherein the power applying means includes RF power applying means and DC power applying means, and the DC power applying means applies an electric power to the electrode carrying the deposition target object.
    Type: Application
    Filed: October 18, 2001
    Publication date: April 4, 2002
    Applicant: Nissin Electric Co., Ltd.
    Inventors: Takahiro Nakahigashi, Akira Doi, Yoshihiro Izumi, Hajime Kuwahara
  • Publication number: 20010042595
    Abstract: A plasma is generated by feeding an antenna with radio-frequency electric power generated by a radio-frequency power source, and one end of the antenna is grounded to the earth through a capacitor of variable capacitance. A Faraday shield is electrically isolated from the earth, and the capacitance of the variable capacitor is determined to be such a value that the voltage at the two ends of the antenna may be equal in absolute values and inverted to reduce the partial removal of the wall after the plasma ignition. At the time of igniting the plasma, the capacitance of the capacitor is adjusted to a larger or smaller value than that minimizing the damage of the wall.
    Type: Application
    Filed: July 23, 2001
    Publication date: November 22, 2001
    Inventors: Hideyuki Kazumi, Tsutomu Tetsuka, Ryoji Nishio, Masatsugu Arai, Ken Yoshioka, Tsunehiko Tsubone, Akira Doi, Manabu Edamura, Kenji Maeda, Saburo Kanai
  • Publication number: 20010040009
    Abstract: A plasma is generated by feeding an antenna with radio-frequency electric power generated by a radio-frequency power source, and one end of the antenna is grounded to the earth through a capacitor of variable capacitance. A Faraday shield is electrically isolated from the earth, and the capacitance of the variable capacitor is determined to be such a value that the voltage at the two ends of the antenna may be equal in absolute values and inverted to reduce the partial removal of the wall after the plasma ignition. At the time of igniting the plasma, the capacitance of the capacitor is adjusted to a larger or smaller value than that minimizing the damage of the wall.
    Type: Application
    Filed: July 23, 2001
    Publication date: November 15, 2001
    Inventors: Hideyuki Kazumi, Tsutomu Tetsuka, Ryoji Nishio, Masatsugu Arai, Ken Yoshioka, Tsunehiko Tsubone, Akira Doi, Manabu Edamura, Kenji Maeda, Saburo Kanai
  • Publication number: 20010037861
    Abstract: A plasma is generated by feeding an antenna with radio-frequency electric power generated by a radio-frequency power source, and one end of the antenna is grounded to the earth through a capacitor of variable capacitance. A Faraday shield is electrically isolated from the earth, and the capacitance of the variable capacitor is determined to be such a value that the voltage at the two ends of the antenna may be equal in absolute values and inverted to reduce the partial removal of the wall after the plasma ignition. At the time of igniting the plasma, the capacitance of the capacitor is adjusted to a larger or smaller value than that minimizing the damage of the wall.
    Type: Application
    Filed: July 23, 2001
    Publication date: November 8, 2001
    Inventors: Hideyuki Kazumi, Tsutomu Tetsuka, Ryoji Nishio, Masatsugu Arai, Ken Yoshioka, Tsunehiko Tsubone, Akira Doi, Manabu Edamura, Kenji Maeda, Saburo Kanai
  • Publication number: 20010037857
    Abstract: A plasma is generated by feeding an antenna with radio-frequency electric power generated by a radio-frequency power source, and one end of the antenna is grounded to the earth through a capacitor of variable capacitance. A Faraday shield is electrically isolated from the earth, and the capacitance of the variable capacitor is determined to be such a value that the voltage at the two ends of the antenna may be equal in absolute values and inverted to reduce the partial removal of the wall after the plasma ignition. At the time of igniting the plasma, the capacitance of the capacitor is adjusted to a larger or smaller value than that minimizing the damage of the wall.
    Type: Application
    Filed: December 8, 2000
    Publication date: November 8, 2001
    Inventors: Hideyuki Kazumi, Tsutomu Tetsuka, Ryoji Nishio, Masatsugu Arai, Ken Yoshioka, Tsunehiko Tsubone, Akira Doi, Manabu Edamura, Kenji Maeda, Saburo Kanai
  • Patent number: 6180019
    Abstract: A plasma is generated by feeding an antenna with radio-frequency electric power generated by a radio-frequency power source, and one end of the antenna is grounded to the earth through a capacitor of variable capacitance. A Faraday shield is electrically isolated from the earth, and the capacitance of the variable capacitor is determined to be such a value that the voltage at the two ends of the antenna may be equal in absolute values and inverted to reduce the partial removal of the wall after the plasma ignition. At the time of igniting the plasma, the capacitance of the capacitor is adjusted to a larger or smaller value than that minimizing the damage of the wall.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 30, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Kazumi, Tsutomu Tetsuka, Ryoji Nishio, Masatsugu Arai, Ken Yoshioka, Tsunehiko Tsubone, Akira Doi, Manabu Edamura, Kenji Maeda, Saburo Kanai
  • Patent number: 6136386
    Abstract: An object such as an automobile part, an image forming apparatus part, a bicycle part, other machine parts, a sport article or its part, a toy or its part, or a rain article or its part has a portion to be in contact with a contact object. The contact portion is made of at least one kind of material selected from a group including polymer material such as resin or rubber as well as glass, and the contact portion has a surface entirely or partially coated with a carbon film (typically, a DLC film) having a wear resistance as well as at least one of a lubricity, a water repellency and a gas barrier property. The carbon film is formed on the object with a good adhesion.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: October 24, 2000
    Assignee: Nissin Electric Co., Ltd.
    Inventors: Takahiro Nakahigashi, Akira Doi, Yoshihiro Izumi, Hajime Kuwahara
  • Patent number: 6076598
    Abstract: An opposed flow heat exchanger comprising partitions including a corrugated portion for forming passages in a wavefront direction, and flat portions for taking in or out air flows from a predetermined direction at opposite ends of the corrugated portion in the wavefront direction; and flat shape holding plates having a length in a direction of the passages which is not longer than a length of the partitions; wherein the partitions and the shape holding plates are alternately layered so that the corrugated portion of each of the partitions and the shape holding plates contact together, and the flat portion of each of the partitions faces to the flat portion of a partition adjacent thereto, thereby independently forming the passages through the partitions.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: June 20, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Doi, Kunihiko Kaga, Hiroyuki Akita, Hidemoto Arai, Youichi Sugiyama
  • Patent number: 6032730
    Abstract: A heat exchanger, in which an alternating flow of supply air and exhaust air are supplied in opposite directions between a plurality of stacked heat exchanging members, is characterized in that the heat exchanging members each is composed of a first paper member having a moisture permeability and corrugated in the width direction and having flat portions at the longitudinally opposite ends flattened under pressure, and a pair of second paper members having one end joined to the flat portions and the other end side extending flatly in the longitudinal direction to define a header defining portion for defining a header portion, so that the number of the parts can be decreased and the assembly can be made easier, whereby a heat exchanger with an improved productivity can be provided. A method for manufacturing a heat exchanger is also disclosed.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: March 7, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Akita, Hidemoto Arai, Akira Doi, Yoichi Sugiyama, Shinji Nakamoto, Kunihiko Kaga
  • Patent number: 6023025
    Abstract: An electric wire in which a carbon film having abrasion resistance and lubricity is formed on the outer surface of an insulation cover made from at least one kind of material selected from rubber and resin, and covering an electric wire body, and a manufacturing method of the electric wire.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: February 8, 2000
    Assignee: Nissin Electric Co., Ltd.
    Inventors: Takahiro Nakahigashi, Akira Doi
  • Patent number: 5938527
    Abstract: An air ventilation or supply system includes a blower for generating a primary flow and an induction nozzle for inducing a secondary flow produced by entrainment of the primary flow. An inlet of the blower and an inlet for the induction nozzle are adjacent each other.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: August 17, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takeharu Oshima, Satoru Kotoh, Akira Doi, Yachiyo Imamura, Isao Tachibana, Shigeki Kobayashi
  • Patent number: 5843293
    Abstract: The arc-type evaporator of the present invention includes an anode and a cathode for generating arc discharging, a trigger electrode and a gas supply pipe. The trigger electrode is contacted with the cathode to cause a first spark, and thereafter is separated from the cathode to occur the arc discharge between the anode and the cathode. The gas supply pipe is provided independently of the trigger electrode, and supplies the cathode a reactive gas which reacts with a substance forming the cathode to produce a chemical compound. The gas supply pipe includes a gas blow-out port formed in the neighborhood of the side portion or rear side portion of the cathode to face the cathode. The reactive gas is supplied from the gas blow-out port to an area including the front surface of the cathode.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: December 1, 1998
    Assignee: Nissin Electric Co., Ltd.
    Inventors: Hiroshi Murakami, Tadashi Kitagawa, Haruo Hiratsuka, Takaya Ishii, Koji Okamoto, Akira Doi
  • Patent number: 5653106
    Abstract: An exothermic heat generating apparatus is preferably used as a heat source for rapidly heating in a vehicle or the like, to enable repetition of stable exothermic reaction for long terms.In the apparatus, a closed cycle includes a reactor filled with alkali earth oxide, a water tank, a water supply pipe to supply water from the water tank into the reactor, and a reflux pipe to return the water from the reactor to the water tank. Reversible reaction between the alkali earth oxide and the water is carried out in the closed system. A pump supplies the reactor with water, and a solenoid valve controls a water supply. The exothermic heat generating apparatus uses heat generated by hydration reaction of the alkali earth oxide to rapidly heat a catalytic section, a cooling water section, an air intake section and the like at a time of engine start-up.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: August 5, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideaki Katashiba, Ryoji Nishiyama, Hiroshi Kimura, Tsuneo Yumikura, Akira Doi, Yoshiaki Akase, Tomoko Masuda
  • Patent number: 5565070
    Abstract: A method for recovering solvent vapor in a manner which requires less power using an apparatus which is smaller in size, has a longer life, and is capable of being operated without reducing recovering efficiency, including locating an inlet of a suction pipe at a position within the container between the liquid surface of the solvent and an upper edge of the container, wherein the opening of the suction pipe is open downward, and drawing the vapor from the upper surface of the solvent in the container.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: October 15, 1996
    Assignee: Morikawa Industries Corporation
    Inventors: Akira Doi, Hiroshi Obinata, Yoshikazu Takano, Osamu Matsumura
  • Patent number: 5503591
    Abstract: The present invention is directed to an apparatus for decontaminating radioactive items such as parts and machinery including means for shotblasting or sandblasting to remove the radioactivity, means for cleaning the substance with a cleaning solution, means for washing the grit used to shotblast or sandblast with a washing solution, means for filtering the washing solution, and means for decontaminating the filtered washing solution by purifying it. The apparatus includes means for decontaminating washing solution to allow reuse thereof.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: April 2, 1996
    Assignee: Morikawa Sangyo Kabushiki Kaisha
    Inventors: Kenji Morikawa, Yasuo Shimizu, Akira Doi
  • Patent number: 5356661
    Abstract: A heat transfer insulated part including a heat transfer substrate formed of a sintered metal of Cu-W or Cu-Mo, an insulating ceramic layer for electrically insulating the heat transfer substrate, formed of ceramic such as Al.sub.2 O.sub.3, SiO.sub.2 and Si.sub.3 N.sub.4, and a barrier layer provided between the heat transfer substrate and an insulating ceramic layer composed of at least either one of metal layers of W and Mo. Furthermore, preferably, an intermediate layer composed of titanium carbide and/or titanium nitride and so forth for enhancing the adhesive property between the insulating ceramic layer and the barrier layer is provided.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 18, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Akira Doi, Shosaku Yamanaka, Hiromu Kawai
  • Patent number: 5302324
    Abstract: Applying shotblast or sandblast to a substance contaminated with radioactivity, cleaning the substance with a liquid, washing the grit of shotblast or sandblast with an organic solvent, filtering the resulting organic solvent, decontaminating the organic solvent itself by distilling the organic solvent filtered, and using this decontaminated solvent for washing said grit.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: April 12, 1994
    Assignee: Morikawa Sangyo Kabushiki Kaisha
    Inventors: Kenji Morikawa, Yasuo Shimizu, Akira Doi
  • Patent number: 5126077
    Abstract: A radioactive decontamination method for decontaminating a radioactive-contaminated object by using methylene chloride in place of conventionally used hydrocarbon fluoride or perchloroethylene. The radioactive-contaminated object is impacted by methylene chloride solution. Before the impacting, a preparatory step is executed as required in which radioactive contaminant, which is usually radioactive-contaminated epoxy-resin paint layer on a part used in a nuclear facility, is impregnated with methylene chloride solution so as to swell, thus facilitating exfoliation of the contaminant from the object. The methylene chloride solution is filtered and distilled so as to be decontaminated and subjected to a repeated use for impacting the radioactive-contaminated object.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: June 30, 1992
    Assignee: Morikawa Sangyo Kabushiki Kaisha
    Inventors: Kenji Morikawa, Toshio Tenjin, Yasuo Shimizu, Akira Doi
  • Patent number: 5023101
    Abstract: Shortening for a hard butter product which comprises crystallized fat composed of as a main ingredient 1,3-saturated-2-unsaturated triglyceride the total carbon atoms of the constituent fatty acid residues of which are not less than 50, and main crystals thereof being of their stable type. There is also disclosed aspect of the present invention is a process for producing a hard butter product which comprises adding the above shortening to a molten mixture of hard butter ingredients during cooling and solidifying of the mixture without melting crystals of the shortening.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: June 11, 1991
    Assignee: Fuji Oil Company, Limited
    Inventors: Hirosi Sugihara, Hiroshi Hidaka, Akira Doi, Toshitaka Okawauchi, Yasushi Kawabata, Hideki Baba
  • Patent number: 4882238
    Abstract: The present invention relates to a die for use in forming optical lenses made of glass or synthetic resin used in OA instruments, VTR, cameras and the like. In order to lengthen the useful life of the die by suppressing the oxidation or deterioration of the die surface due to temperature and atmosphere and reaction of materials of which lenses are made, when lenses are formed, the die is coated with a single-layer or multi-layer thin film of Si.sub.3 N.sub.4 or SiC or compounds thereof, which are superior in wear and corrosion resistance at high temperatures, by the vapor coating method.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: November 21, 1989
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yoshioka, Akira Doi