Patents by Inventor Yoshio Okamoto

Yoshio Okamoto 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: 7387263
    Abstract: The heating injector in which the fuel is heated within a short time when starting and the size of a fuel atomized particle is very small h as casing 10 for a fuel injection valve which supplies fuel to an engine, orifice member 50 with an orifice through which fuel passes, plunger 20 which carries out switching action of orifice, swirl chip 30 which contacts the orifice member and the casing at a plurality of positions, and forms a fuel passage blocked by a plurality of narrow portions and a fuel heating space channel where entrance side was blocked by the narrow portion in the downstream side, and a heater which is arranged between fuel passage forming member and casing and supported by either of the fuel passage forming member or the casing in a plurality of parts in the fuel passage.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: June 17, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihito Yasukawa, Noriyuki Maekawa, Takehiko Kowatari, Yoshio Okamoto
  • Publication number: 20080081897
    Abstract: A separating agent which combines a high optical resolving power inherent in polysaccharide derivatives with sufficient solvent resistance and a method with which the separating agent can be produced efficiently in short steps. The separating agent for enantiomeric isomers is characterized in that a polymerizable polysaccharide derivative of a polysaccharide derivative having polymerizable functional groups and a polymerizable monomer having polymerizable unsaturated groups are copolymerized with a carrier having polymerizable functional groups to be chemically bound mutually. The separating agent is preferably used for high performance liquid chromatography (HPLC) and has an excellent solvent resistance.
    Type: Application
    Filed: November 15, 2007
    Publication date: April 3, 2008
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Takateru Kubota
  • Publication number: 20080050288
    Abstract: An air purification member is provided that can reduce the generation of unpleasant odor or the occurrence of air contamination without necessitating frequent cleaning or replacement. The air purification member can be part of an air purification unit or an air conditioning apparatus. A first photocatalytic filter of an air purifier is a filter for purifying air that contains particulates containing viruses or microbes, and is provided with a photocatalytic filter and a photocatalytic apatite. The photocatalytic filter collects the particulates. The photocatalytic apatite removes viruses or microbes that are contained in the particulates collected by the photocatalytic filter.
    Type: Application
    Filed: August 29, 2007
    Publication date: February 28, 2008
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshio Okamoto, Shigeharu Taira, Tarou Kuroda, Satoki Nakada
  • Patent number: 7334563
    Abstract: A fuel injector has a plunger for opening/closing a fuel path to control the amount of fuel to be injected; a seat portion for the plunger; and a plurality of nozzle holes for injecting fuel passed through between the plunger and the seat portion, A nozzle plate is provided with the seat portion, and a taper-fuel inlet hole has a diameter that gradually reduces from the seat toward its outlet, An orifice plate is arranged downstream from the taper-fuel inlet hole, and is provided with a concave portion opposite to the nozzle plate, with a plurality of nozzle holes being formed concentrically at a bottom of the concave portion. Each nozzle hole has an inclined angle in the direction of the plate thickness within the concave area.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: February 26, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Mifuji, Tohru Ishikawa, Atsushi Sekine, Yoshio Okamoto
  • Patent number: 7323101
    Abstract: A separating agent which combines a high optical resolving power inherent in polysaccharide derivatives with sufficient solvent resistance and a method with which the separating agent can be produced efficiently in short steps. The separating agent for enantiomeric isomers is characterized in that a polymerizable polysaccharide derivative of a polysaccharide derivative having polymerizable functional groups and a polymerizable monomer having polymerizable unsaturated groups are copolymerized with a carrier having polymerizable functional groups to be chemically bound mutually. The separating agent is preferably used for high performance liquid chromatography (HPLC) and has an excellent solvent resistance.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: January 29, 2008
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Takateru Kubota
  • Publication number: 20070295213
    Abstract: An air purification member is provided that can reduce the generation of unpleasant odor or the occurrence of air contamination without necessitating frequent cleaning or replacement. The air purification member can be part of an air purification unit or an air conditioning apparatus. A first photocatalytic filter of an air purifier is a filter for purifying air that contains particulates containing viruses or microbes, and is provided with a photocatalytic filter and a photocatalytic apatite. The photocatalytic filter collects the particulates. The photocatalytic apatite removes viruses or microbes that are contained in the particulates collected by the photocatalytic filter.
    Type: Application
    Filed: August 29, 2007
    Publication date: December 27, 2007
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshio OKAMOTO, Shigeharu TAIRA, Tarou KURODA, Satoki NAKADA
  • Publication number: 20070215549
    Abstract: The present invention provides a separating agent for enantiomeric isomers having no large UV absorption, as represented by an aromatic group, and having high asymmetric recognizability, particularly, high asymmetric recognizability in an aqueous mobile phase, or a separating agent for enantiomeric isomers containing a polysaccharide alicyclic ester derivative free from an aromatic group as an effective component.
    Type: Application
    Filed: May 22, 2007
    Publication date: September 20, 2007
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Takateru Kubota
  • Publication number: 20070213002
    Abstract: A cleaning treatment material has a mixture of a photosemiconductor catalyst and an apatite, which has a photocatalytic function. Secondary particles of the photosemiconductor catalyst are 0.1 to 1.0 ?m in diameter. In addition, secondary particles of the apatite are 1 to 10 ?m in diameter.
    Type: Application
    Filed: April 5, 2005
    Publication date: September 13, 2007
    Applicant: Daikin Industries, Ltd.
    Inventors: Yoshio Okamoto, Shigeharu Taira, Tarou Kuroda
  • Publication number: 20070209373
    Abstract: An air conditioner that can decompose and remove bacteria, viruses and the like, which are sources of odor, with efficiency is provided. The air conditioner includes a resin part and an apatite having a photocatalytic function. The resin part forms an air distribution path. The apatite is disposed on at least part of the resin part.
    Type: Application
    Filed: April 5, 2005
    Publication date: September 13, 2007
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shigeharu Taira, Tarou Kuroda, Yoshio Okamoto
  • Patent number: 7264181
    Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the positions thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: September 4, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Hiromasa Kubo, Toru Ishikawa, Yasuo Namaizawa
  • Patent number: 7231902
    Abstract: At an outlet portion of an injection hole (8) of a fuel injection valve (1), through removal of a part (A1, 7B) of a wall forming the injection hole (8), a restriction to a spray flow is released, thereby, a deflection spray is formed in which the spray is rich at the side of restriction released and is learn at the side of restricted, accordingly, ignition property of an internal combustion engine is improved, and an optimum spray is realized which reduces exhaust amount of unburnt gas components.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: June 19, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Ayumu Miyajima, Yoshio Okamoto, Yuzo Kadomukai, Shigenori Togashi, Kiyoshi Amo, Makoto Yamakado, Tohru Ishikawa, Hiromasa Kubo, Hiroshi Fujii
  • Patent number: 7223334
    Abstract: The present invention provides a separating agent for enantiomeric isomers having no large UV absorption, as represented by an aromatic group, and having high asymmetric recognizability, particularly, high asymmetric recognizability in an aqueous mobile phase, or a separating agent for enantiomeric isomers containing a polysaccharide alicyclic ester derivative free from an aromatic group as an effective component.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: May 29, 2007
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Takateru Kubota
  • Publication number: 20070075166
    Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very acc
    Type: Application
    Filed: December 5, 2006
    Publication date: April 5, 2007
    Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe
  • Publication number: 20070039890
    Abstract: The present invention provides a separating agent for enantiomeric isomers exhibiting high separation power. That is, the present invention provides a separating agent for enantiomeric isomers including, as an active ingredient, a polysaccharide derivative having at least part of hydrogen atoms of hydroxyl groups of a polysaccharide such as cellulose or amylose substituted by at least one of atomic groups represented by the following general formulae (I) and (II): (in the formulae, R represents a substituted or unsubstituted aromatic group, or a linear, branched, or cyclic aliphatic group).
    Type: Application
    Filed: April 22, 2004
    Publication date: February 22, 2007
    Inventors: Yoshio Okamoto, Chiyo Yamamoto
  • Publication number: 20070029242
    Abstract: The present invention provides a separating agent for enantiomeric isomers, which has an excellent ability to identify asymmetry. That is, the present invention relates to a separating agent for enantiomeric isomers which includes as an effective component a polysaccharide derivative having a bicyclic or more structure having an aromatic, alicyclic, or heterocyclic ring.
    Type: Application
    Filed: October 3, 2006
    Publication date: February 8, 2007
    Inventors: Yoshio Okamoto, Chiyo Yamamoto
  • Patent number: 7163162
    Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very acc
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: January 16, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe
  • Patent number: 7156989
    Abstract: The present invention provides a separating agent for enantiomeric isomers, which has an excellent ability to identify asymmetry. That is, the present invention relates to a separating agent for enantiomeric isomers which includes as an effective component a polysaccharide derivative having a bicyclic or more structure having an aromatic, alicyclic, or heterocyclic ring.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: January 2, 2007
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto
  • Publication number: 20060219615
    Abstract: A separating agent for chromatography which comprises a polysaccharide derivative having a structure in which part of the hydroxy groups present in the polysaccharide which have been crosslinked to each other through crosslinking molecules and the hydroxy groups present in the polysaccharide which have not been crosslinked have been modified with modifying molecules. The polysaccharide derivative is not in the state of being carried on a carrier, and has been formed into, e.g., beads. The separating agent is less likely to dissolve in elution solvent and enables a large amount of a compound to be optically resolved at a time. It can withstand a high pressure.
    Type: Application
    Filed: March 26, 2004
    Publication date: October 5, 2006
    Inventors: Yoshio Okamoto, Chiyo Yamamoto
  • Publication number: 20060191511
    Abstract: A fuel injector comprising: a plunger for opening/closing a fuel path to control the amount of fuel to be injected; a seat portion for the plunger; a plurality of nozzle holes for injecting fuel passed through between the plunger and the seat portion, and the fuel injector further comprising: a nozzle plate provided with the seat portion, and a taper-fuel inlet hole whose diameter is gradually reduced from the seat toward its outlet; and a orifice plate arranged downstream the taper-fuel inlet hole, and provided with a concave portion opposite to the nozzle plate, and a plurality of nozzle holes being formed concentrically at a bottom of the concave, wherein the plurality of nozzle holes are formed so that each nozzle hole has an inclined angle in the direction of the plate thickness within the concave area.
    Type: Application
    Filed: January 31, 2006
    Publication date: August 31, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Masanori Mifuji, Tohru Ishikawa, Atsushi Sekine, Yoshio Okamoto
  • Publication number: 20060189796
    Abstract: The present invention provides a separating agent for enantiomeric isomers which exhibits high optical resolving power together with solvent resistance. That is, the present invention provides a separating agent for enantiomeric isomers including a polysaccharide derivative such as a carbamate derivative or ester derivative of cellulose or amylose carried on a porous carrier such as silica gel, in which the porous carrier having an epoxy group and part of hydroxyl groups of the polysaccharide derivative are chemically bonded.
    Type: Application
    Filed: April 22, 2004
    Publication date: August 24, 2006
    Inventors: Yoshio Okamoto, Chiyo Yamamoto