Patents by Inventor Kitaru Iwata
Kitaru Iwata 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: 8760038Abstract: A vibration actuator includes a roller, a vibrating element having a contact portion that is in contact with the roller, a vibrator for vibrating the vibrating element, a pressing device for pressing the roller against the vibrating element, and a lubricator disposed close to the contact portion and in contact with the roller.Type: GrantFiled: June 30, 2011Date of Patent: June 24, 2014Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Shinya Asai, Hiroyuki Takei, Kazuo Seiki, Kitaru Iwata, Mikiya Kurita, Masaki Takasan
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Publication number: 20120001519Abstract: A vibration actuator includes a roller, a vibrating element having a contact portion that is in contact with the roller, a vibrator for vibrating the vibrating element, a pressing device for pressing the roller against the vibrating element, and a lubricator disposed close to the contact portion and in contact with the roller.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: Kabushiki Kaisha Toyota JidoshokkiInventors: Shinya ASAI, Hiroyuki Takei, Kazuo Seiki, Kitaru Iwata, Mikiya Kurita, Masaki Takasan
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Patent number: 7638927Abstract: Provided is a vibration actuator in which a plurality of rotors can be driven by a single vibration unit. Two rotors (A) and (B) are attracted toward corresponding stators to be contacted with and pressurized against the corresponding stators (3) and (4), respectively, through a tension of a wire member (8). A composite vibration combining a plurality of vibrations is generated by a composite vibrator (2) to cause elliptical movements in corner portions of the stators (3) and (4). As a result, the two rotors (A) and (B) abutting onto and pressurized against the two stators (3) and (4) are rotated about rotation centers (C1) and (C2) thereof, respectively, at the same time.Type: GrantFiled: February 14, 2007Date of Patent: December 29, 2009Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Masaki Takasan, Hirohiko Ishikawa, Kazuo Seiki, Tsuyoshi Kodera, Kitaru Iwata
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Publication number: 20090267455Abstract: Provided is a vibration actuator in which a plurality of rotors can be driven by a single vibration unit. Two rotors (A) and (B) are attracted toward corresponding stators to be contacted with and pressurized against the corresponding stators (3) and (4), respectively, through a tension of a wire member (8). A composite vibration combining a plurality of vibrations is generated by a composite vibrator (2) to cause elliptical movements in corner portions of the stators (3) and (4). As a result, the two rotors (A) and (B) abutting onto and pressurized against the two stators (3) and (4) are rotated about rotation centers (C1) and (C2) thereof, respectively, at the same time.Type: ApplicationFiled: February 14, 2007Publication date: October 29, 2009Inventors: Masaki Takasan, Hirohiko Ishikawa, Kazuo Seiki, Tsuyoshi Kodera, Kitaru Iwata
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Patent number: 6927656Abstract: An electromagnetic actuator includes a cylinder, a stationary core and a movable core arranged in the cylinder, and a coil located about the cylinder. The movable core moves in the cylinder in accordance with an electromagnetic force, which is generated between the stationary core and the movable core based on the current supply to the coil. The cylinder includes a first cylindrical member made of nonmagnetic material, and a second cylindrical member made of magnetic material. The first cylindrical member surrounds the stationary core and the movable core. A part of the first cylindrical member in the vicinity of the movable core is made thin to form a small diameter portion. The small diameter portion is fitted to the second cylindrical member.Type: GrantFiled: February 22, 2002Date of Patent: August 9, 2005Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Kitaru Iwata, Hiroshi Fukasaku, Hirohito Hayashi, Izuru Shimizu, Naoya Yokomachi
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Publication number: 20050063836Abstract: An electric compressor includes a gas compression mechanism accommodated in a compressor housing and an electric motor for driving the compression mechanism. A circuit cover is joined to the outer surface of the compressor housing. The compressor housing and the circuit cover define an accommodating space. A motor driving circuit or driving the electric motor is accommodated in the accommodating space. The motor driving circuit is attached to the circuit cover. Accordingly, the compressor reduces manufacturing costs.Type: ApplicationFiled: February 17, 2004Publication date: March 24, 2005Inventors: Kazuya Kimura, Masanori Sonobe, Kitaru Iwata
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Publication number: 20040045307Abstract: A hybrid compressor system in a vehicle air conditioner includes a variable displacement hybrid compressor, a detector for detecting information for air conditioning, a thermal load calculator and a controller. The compressor is selectively driven by an engine and an electric motor. The calculator calculates a thermal load based on the detected information. The controller compares the thermal load with a predetermined value. The controller changes displacement of the compressor to a first predetermined displacement value and selects the engine as a drive source of the compressor when the thermal load is larger than the predetermined value. The controller changes the displacement of the compressor to a second predetermined displacement value that is smaller than the first predetermined displacement value and selects the electric motor as the drive source of the compressor when the thermal load is equal to, or smaller than the predetermined value.Type: ApplicationFiled: June 12, 2003Publication date: March 11, 2004Inventors: Kitaru Iwata, Masahiro Kawaguchi, Yasuharu Odachi, Hirohito Hayashi, Masanori Sonobe, Jiro Iwasa, Masao Iguchi, Akihito Yamanouchi
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Patent number: 6702251Abstract: A control valve for a variable displacement compressor is provided. A retainer cylinder in the control valve includes a first cylindrical member made of non-magnetic material and a second cylindrical member having a bottom portion made of magnetic material. A shim is intervened a bottom surface of a plunger and inner bottom surface of the second cylindrical member. The retainer cylinder has good magnetic permeability between a coil and the plunger, even though the wall of the cylinder thickens to improve the withstanding pressure to internal refrigerant pressure.Type: GrantFiled: February 25, 2002Date of Patent: March 9, 2004Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Kitaru Iwata, Naoya Yokomachi, Izuru Shimizu, Hirohito Hayashi, Hiroshi Fukasaku
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Patent number: 6684654Abstract: A control valve includes an accommodation cylinder, a coil, a stator, a plunger, and a valve body. Electromagnetic force is generated between the stator and the plunger and the plunger moves relative to the stator. The valve body adjusts the opening degree of a valve hole. A flat surface and a peripheral wall are formed in an end of the stator. The peripheral wall has a tapered cross-section with an inclined inner surface. The inclined inner surface and the flat surface define a recess. The plunger has a frustum portion. The frustum portion includes a flat distal surface and an annular inclined surface. The taper angle of the peripheral wall is equal to or less than twenty degrees. The diameter of the flat distal surface of the frustum portion is equal to or greater than eighty percent of the largest diameter of the annular inclined surface.Type: GrantFiled: May 9, 2002Date of Patent: February 3, 2004Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Hiroshi Fukasaku, Hirohito Hayashi, Kitaru Iwata, Satoshi Umemura, Ryo Matsubara, Taku Adaniya
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Publication number: 20040013544Abstract: An electric compressor has a compressor housing, a compression mechanism, an electric motor, a circuit cover and a motor drive circuit. The compression mechanism is arranged in the compressor housing for compressing fluid. The electric motor is arranged in the compressor housing for driving the compression mechanism. The circuit cover is connected to an outer surface of the compressor housing. The circuit cover and the compressor housing define an accommodating space. The motor drive circuit is arranged in the accommodating space for driving the electric motor and includes a substrate and a switching device that is mounted on the substrate on the far side relative to the circuit cover. The switching device is pressed against the compressor housing as the motor drive circuit is fastened between the compressor housing and the circuit cover in the accommodating space due to connection of the circuit cover to the compressor housing.Type: ApplicationFiled: July 14, 2003Publication date: January 22, 2004Inventors: Kazuya Kimura, Masanori Sonobe, Kitaru Iwata, Ken Suitou, Hiroyuki Gennami, Kazuhiro Kuroki
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Publication number: 20040009078Abstract: A motor drive circuit for driving an electric motor in an electric compressor has a substrate and a plurality of electrical components. The compressor includes a compressor housing having a circumferential wall around a central axis of the compressor. The circumferential wall has a substantially cylindrical surface. The substrate is arranged outside the circumferential wall and includes a first portion and a second portion. The first portion is closer to the central axis than the second portion. The electrical components are mounted on the substrate on the near side relative to the central axis and include short electrical components that have relatively short height from the substrate and tall electrical components that have relatively tall height from the substrate. The electrical components line the cylindrical surface of the circumferential wall in such a manner that the short and tall electrical components are respectively arranged at the first and second portions.Type: ApplicationFiled: July 14, 2003Publication date: January 15, 2004Inventors: Kazuya Kimura, Ken Suitou, Hiroyuki Gennami, Kazuhiro Kuroki, Kitaru Iwata, Masanori Sonobe
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Publication number: 20030014990Abstract: A control valve includes an accommodation cylinder, a coil, a stator, a plunger, and a valve body. Electromagnetic force is generated between the stator and the plunger and the plunger moves relative to the stator. The valve body adjusts the opening degree of a valve hole. A flat surface and a peripheral wall are formed in an end of the stator. The peripheral wall has a tapered cross-section with an inclined inner surface. The inclined inner surface and the flat surface define a recess. The plunger has a frustum portion. The frustum portion includes a flat distal surface and an annular inclined surface. The taper angle of the peripheral wall is equal to or less than twenty degrees. The diameter of the flat distal surface of the frustum portion is equal to or greater than eighty percent of the largest diameter of the annular inclined surface.Type: ApplicationFiled: May 9, 2002Publication date: January 23, 2003Inventors: Hiroshi Fukasaku, Hirohito Hayashi, Kitaru Iwata, Satoshi Umemura, Ryo Matsubara, Taku Adaniya
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Publication number: 20020117642Abstract: A control valve for a variable displacement compressor is provided. A retainer cylinder in the control valve includes a first cylindrical member made of non-magnetic material and a second cylindrical member having a bottom portion made of magnetic material. A shim is intervened a bottom surface of a plunger and inner bottom surface of the second cylindrical member. The retainer cylinder has good magnetic permeability between a coil and the plunger, even though the wall of the cylinder thickens to improve the withstanding pressure to internal refrigerant pressure.Type: ApplicationFiled: February 25, 2002Publication date: August 29, 2002Inventors: Kitaru Iwata, Naoya Yokomachi, Izuru Shimizu, Hirohito Hayashi, Hiroshi Fukasaku
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Publication number: 20020118086Abstract: An electromagnetic actuator includes a cylinder, a stationary core and a movable core arranged in the cylinder, and a coil located about the cylinder. The movable core moves in the cylinder in accordance with an electromagnetic force, which is generated between the stationary core and the movable core based on the current supply to the coil. The cylinder includes a first cylindrical member made of nonmagnetic material, and a second cylindrical member made of magnetic material. The first cylindrical member surrounds the stationary core and the movable core. A part of the first cylindrical member in the vicinity of the movable core is made thin to form a small diameter portion. The small diameter portion is fitted to the second cylindrical member.Type: ApplicationFiled: February 22, 2002Publication date: August 29, 2002Inventors: Kitaru Iwata, Hiroshi Fukasaku, Hirohito Hayashi, Izuru Shimizu, Naoya Yokomachi