Patents by Inventor Masaaki Iijima
Masaaki Iijima 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).
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Patent number: 7541712Abstract: A fuel pump forming part of a fuel supply system for an automotive internal combustion engine. The fuel pump includes a hollow casing in which a pump section and an electric motor for driving the pump section are disposed. A connector is provided for connecting the electric motor to an external power source, and has a terminal. A brush is slidably contacted with a rotor of the electric motor so as to supply power to a coil of the rotor. A lead wire is provided for electrically connecting the terminal of the connector to the brush. A plating layer of tin is formed on the lead wire by a tin-electroplating.Type: GrantFiled: April 11, 2006Date of Patent: June 2, 2009Assignee: Hitachi, Ltd.Inventors: Masaaki Iijima, Junichi Motojima
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Patent number: 7455496Abstract: A turbine fuel pump includes an impeller having blades, each including a linear blade portion extending linearly in the radial direction of the impeller and a curved blade portion extending circularly curvedly from the head of the linear blade portion to the forward side of the impeller as viewed in the direction of rotation of the impeller. The linear blade portion has a length of (? to ?)×H, where H is an overall length of the impeller.Type: GrantFiled: August 11, 2005Date of Patent: November 25, 2008Assignee: Hitachi, Ltd.Inventors: Junichi Motojima, Masaaki Iijima
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Patent number: 7367354Abstract: A check valve includes a housing formed with a valve hole through which fluid flows, a valve seat formed on the peripheral wall of the valve hole, a valve element disposed in the valve hole to be movable between a valve closed position where the valve element makes close contact with the valve seat to close the valve hole and a valve open position where the valve element moves away from the valve seat in the downstream direction to open the valve hole, a coil spring for biasing the valve element toward the valve closed position wherein the coil spring is larger in outer diameter than valve element, and a pressure acting portion provided to the coil spring so as to undergo the pressure of fluid.Type: GrantFiled: March 15, 2005Date of Patent: May 6, 2008Assignee: Hitachi, Ltd.Inventors: Junichi Motojima, Masaaki Iijima
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Publication number: 20070086882Abstract: A turbine fuel pump includes an impeller having blades, each including a linear blade portion extending linearly in the radial direction of the impeller and a curved blade portion extending circularly curvedly from the head of the linear blade portion to the forward side of the impeller as viewed in the direction of rotation of the impeller. The linear blade portion has a length of (? to ?)×H, where H is an overall length of the impeller.Type: ApplicationFiled: August 11, 2005Publication date: April 19, 2007Inventors: Junichi Motojima, Masaaki Iijima
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Patent number: 7160079Abstract: A turbine fuel pump including a cylindrical casing, an electric motor accommodated in the casing, a pump housing mounted into the casing, and an impeller disposed within the pump housing and driven around an axis in a rotational direction by the electric motor. The impeller includes a plurality of vanes each formed into a generally rectangular plate including a tip end face that extends circumferentially to define an outer peripheral surface of the impeller, and front and rear faces respectively located on forward and rearward sides in the rotational direction of the impeller. The front face is curved such that a tip end portion thereof is positioned forwardly in the rotational direction of the impeller relative to a root portion thereof. A chamfer portion is disposed between the tip end face and a tip end portion of the front face.Type: GrantFiled: March 17, 2006Date of Patent: January 9, 2007Assignee: Hitachi, Ltd.Inventors: Masaaki Iijima, Junichi Motojima
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Publication number: 20060236985Abstract: A fuel pump forming part of a fuel supply system for an automotive internal combustion engine. The fuel pump includes a hollow casing in which a pump section and an electric motor for driving the pump section are disposed. A connector is provided for connecting the electric motor to an external power source, and has a terminal. A brush is slidably contacted with a rotor of the electric motor so as to supply power to a coil of the rotor. A lead wire is provided for electrically connecting the terminal of the connector to the brush. A plating layer of tin is formed on the lead wire by a tin-electroplating.Type: ApplicationFiled: April 11, 2006Publication date: October 26, 2006Inventors: Masaaki Iijima, Junichi Motojima
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Publication number: 20060159546Abstract: A turbine fuel pump including a cylindrical casing, an electric motor accommodated in the casing, a pump housing mounted into the casing, and an impeller disposed within the pump housing and driven around an axis in a rotational direction by the electric motor. The impeller includes a plurality of vanes each formed into a generally rectangular plate including a tip end face that extends circumferentially to define an outer peripheral surface of the impeller, and front and rear faces respectively located on forward and rearward sides in the rotational direction of the impeller. The front face is curved such that a tip end portion thereof is positioned forwardly in the rotational direction of the impeller relative to a root portion thereof. A chamfer portion is disposed between the tip end face and a tip end portion of the front face.Type: ApplicationFiled: March 17, 2006Publication date: July 20, 2006Inventors: Masaaki Iijima, Junichi Motojima
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Patent number: 7048494Abstract: A turbine fuel pump including a cylindrical casing, an electric motor accommodated in the casing, a pump housing mounted into the casing, and an impeller disposed within the pump housing and driven around an axis in a rotational direction by the electric motor. The impeller includes a plurality of vanes each formed into a generally rectangular plate including a tip end face that extends circumferentially to define an outer peripheral surface of the impeller, and front and rear faces respectively located on forward and rearward sides in the rotational direction of the impeller. The front face is curved such that a tip end portion thereof is positioned forwardly in the rotational direction of the impeller relative to a root portion thereof. A chamfer portion is disposed between the tip end face and a tip end portion of the front face.Type: GrantFiled: February 24, 2004Date of Patent: May 23, 2006Assignee: Hitachi Ltd.Inventors: Masaaki Iijima, Junichi Motojima
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Patent number: 6974302Abstract: A turbine fuel pump includes an impeller having blades, each including a linear blade portion extending linearly in the radial direction of the impeller and a curved blade portion extending circularly curvedly from the head of the linear blade portion to the forward side of the impeller as viewed in the direction of rotation of the impeller. The linear blade portion has a length of (? to ?)×H, where H is an overall length of the impeller.Type: GrantFiled: April 22, 2003Date of Patent: December 13, 2005Assignee: Hitachi Unisia Automotive, Ltd.Inventors: Junichi Motojima, Masaaki IIjima
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Publication number: 20050205135Abstract: A check valve includes a housing formed with a valve hole through which fluid flows, a valve seat formed on the peripheral wall of the valve hole, a valve element disposed in the valve hole to be movable between a valve closed position where the valve element makes close contact with the valve seat to close the valve hole and a valve open position where the valve element moves away from the valve seat in the downstream direction to open the valve hole, a coil spring for biasing the valve element toward the valve closed position wherein the coil spring is larger in outer diameter than valve element, and a pressure acting portion provided to the coil spring so as to undergo the pressure of fluid.Type: ApplicationFiled: March 15, 2005Publication date: September 22, 2005Inventors: Junichi Motojima, Masaaki Iijima
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Patent number: 6913002Abstract: A fuel feed system for an internal combustion engine includes a fuel tank for accumulating fuel, a fuel/air switchable pump for sucking and discharging accumulated fuel and air outside the fuel tank, a first device that allows accumulated fuel to be discharged to the engine, a second device that allows outside air to be sucked into the fuel tank, and an ECU for controlling the switchable pump.Type: GrantFiled: December 2, 2003Date of Patent: July 5, 2005Assignee: Hitachi, Ltd.Inventors: Toru Mashimo, Hironori Ohhashi, Masaaki Iijima, Satoru Watanabe
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Patent number: 6796764Abstract: A turbine fuel pump includes: a casing for casing an electric motor; a pump housing disposed at the casing, and an impeller rotatably disposed in the pump housing. The pump housing includes a fuel passage between an intake port and a delivery port. The fuel passage includes a flow path defining a cross section S. The impeller has an outer periphery formed with a vane which force feeds the fuel in the fuel passage when the impeller is rotated with the electric motor. The vane defines a height H and a thickness T. The fuel passage defines the following typical dimension Rm: Rm=S/(2H+T). A wall of the flow path defining the cross section S is profiled by a profile length Lp. The profile length Lp divided by the typical dimension Rm makes a dimension ratio Lp/Rm in a first range from 11 to 16.Type: GrantFiled: April 28, 2003Date of Patent: September 28, 2004Assignee: Hitachi Unisia Automotive, Ltd.Inventors: Junichi Motojima, Masaaki Iijima
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Publication number: 20040165981Abstract: A turbine fuel pump including a cylindrical casing, an electric motor accommodated in the casing, a pump housing mounted into the casing, and an impeller disposed within the pump housing and driven around an axis in a rotational direction by the electric motor. The impeller includes a plurality of vanes each formed into a generally rectangular plate including a tip end face that extends circumferentially to define an outer peripheral surface of the impeller, and front and rear faces respectively located on forward and rearward sides in the rotational direction of the impeller. The front face is curved such that a tip end portion thereof is positioned forwardly in the rotational direction of the impeller relative to a root portion thereof. A chamfer portion disposed between the tip end face and a tip end portion of the front face.Type: ApplicationFiled: February 24, 2004Publication date: August 26, 2004Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.Inventors: Masaaki Iijima, Junichi Motojima
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Publication number: 20040112341Abstract: A fuel feed system for an internal combustion engine includes a fuel tank for accumulating fuel, a fuel/air switchable pump for sucking and discharging accumulated fuel and air outside the fuel tank, a first device that allows accumulated fuel to be discharged to the engine, a second device that allows outside air to be sucked into the fuel tank, and an ECU for controlling the switchable pump.Type: ApplicationFiled: December 2, 2003Publication date: June 17, 2004Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.Inventors: Toru Mashimo, Hironori Ohhashi, Masaaki Iijima, Satoru Watanabe
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Publication number: 20030228212Abstract: A turbine fuel pump includes: a casing for casing an electric motor; a pump housing disposed at the casing, and an impeller rotatably disposed in the pump housing. The pump housing includes a fuel passage between an intake port and a delivery port. The fuel passage includes a flow path defining a cross section S. The impeller has an outer periphery formed with a vane which force feeds the fuel in the fuel passage when the impeller is rotated with the electric motor. The vane defines a height H and a thickness T.Type: ApplicationFiled: April 28, 2003Publication date: December 11, 2003Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.Inventors: Junichi Motojima, Masaaki Iijima
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Patent number: 5763687Abstract: An improved preparation process for an aromatic mononitro compound comprising reacting an aromatic compound with mixed acid consisting of nitric acid, sulfuric acid or phosphoric acid and water, wherein these flow to react with each other in a reactor comprising a tube inside of which more than one twisted tabular members are aligned in sequence in a manner that a front margin of a twisted tabular member is substantially perpendicular to an back margin of the preceding member, can resolve a number of problems such as an inadequate mixing efficiency, reduction of a reaction rate, associated voluminal increase/complication of a reactor and difficulty in securing safety as well as provide the aromatic mononitro compound with minimal amount of by-products in a considerably short period.Type: GrantFiled: December 10, 1996Date of Patent: June 9, 1998Assignee: Mitsui Chemicals, Inc.Inventors: Jyoji Morisaki, Masaaki Iijima, Kouki Oogaki, Hiroaki Matsuno, Takashi Yamaguchi, Katsuharu Miyata
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Patent number: 5364958Abstract: The hue of a methylene-crosslinked polyphenylene polyisocyanate continuously produced by the reaction with phosgene in an inert solvent of a polyamine mixture obtained by condensation of aniline and formaldehyde in the presence of an acid catalyst is improved by first removing any residual phosgene followed by heat treatment in the presence of hydrogen chloride gas.Type: GrantFiled: June 22, 1993Date of Patent: November 15, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Noritoshi Ishida, Zunzi Tashima, Naoki Sato, Michiya Takasaki, Masaaki Iijima, Kazuyuki Kuroda, Kazunari Nitta