Patents by Inventor Ken Naitoh
Ken Naitoh 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: 10125674Abstract: An engine without a compressor or a turbine comprises a combustion chamber for burning a fuel-air mixture formed by mixing a fuel with outside air; and an outside air introduction part for introducing outside air into the combustion chamber. The outside air introduction part comprises an intake main port for introducing outside air into the combustion chamber from the direction along the central axis of the combustion chamber and a plurality of intake sub-ports for introducing outside air into the combustion chamber from the direction toward the central axis. The intake sub-ports comprise ejection openings capable of ejecting outside air toward a collision point inside the combustion chamber. Streams of outside air ejected from the ejection openings of the intake sub-ports mutually collide at the collision point and are thereby compressed.Type: GrantFiled: March 27, 2011Date of Patent: November 13, 2018Assignee: WASEDA UNIVERSITYInventor: Ken Naitoh
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Patent number: 9388736Abstract: The free-piston engine 10 includes a combustion space F for combusting an air-fuel mixture, a piston 12 capable of reciprocation between a most-compressed position and a most-expanded position, suction ports 14 for introducing outside air into the combustion space F, and exhaust ports 16 for directing the exhaust gas to the outside. The piston 12 extracts power by moving from the most-compressed position to the most-expanded position by a combustion explosive force and returns from the most-expanded position to the most-compressed position by the actuation of a piston drive device. Furthermore, the piston 12 opens the exhaust port 16 to the combustion space F when the piston 12 has reached the most-expanded position, whereas the piston 12 closes the exhaust ports 16 to the combustion space F when the piston is present in a different position.Type: GrantFiled: August 8, 2012Date of Patent: July 12, 2016Assignee: WASEDA UNIVERSITYInventor: Ken Naitoh
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Publication number: 20140283791Abstract: The free-piston engine 10 includes a combustion space F for combusting an air-fuel mixture, a piston 12 capable of reciprocation between a most-compressed position and a most-expanded position, suction ports 14 for introducing outside air into the combustion space F, and exhaust ports 16 for directing the exhaust gas to the outside. The piston 12 extracts power by moving from the most-compressed position to the most-expanded position by a combustion explosive force and returns from the most-expanded position to the most-compressed position by the actuation of a piston drive device. Furthermore, the piston 12 opens the exhaust port 16 to the combustion space F when the piston 12 has reached the most-expanded position, whereas the piston 12 closes the exhaust ports 16 to the combustion space F when the piston is present in a different position.Type: ApplicationFiled: August 8, 2012Publication date: September 25, 2014Applicant: WASEDA UNIVERSITYInventor: Ken Naitoh
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Publication number: 20130087109Abstract: An engine without a compressor or a turbine comprises a combustion chamber for burning a fuel-air mixture formed by mixing a fuel with outside air; and an outside air introduction part for introducing outside air into the combustion chamber. The outside air introduction part comprises an intake main port for introducing outside air into the combustion chamber from the direction along the central axis of the combustion chamber and a plurality of intake sub-ports for introducing outside air into the combustion chamber from the direction toward the central axis. The intake sub-ports comprise ejection openings capable of ejecting outside air toward a collision point inside the combustion chamber. Streams of outside air ejected from the ejection openings of the intake sub-ports mutually collide at the collision point and are thereby compressed.Type: ApplicationFiled: March 27, 2011Publication date: April 11, 2013Applicant: WASEDA UNIVERSITYInventor: Ken Naitoh
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Patent number: 7266404Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management. The device for collecting skin permeable gas includes a finger-stall including a coupler, and one or more connections that are connectable with the coupler and include a stopcock.Type: GrantFiled: May 12, 2006Date of Patent: September 4, 2007Assignee: Japan Science and Technology AgencyInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Patent number: 7261692Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and is useful for in-home medical care and health management. The apparatus includes a device for collecting skin permeable gas including a container for storing skin permeable gas; a partition, disposed at a lower section inside the container, having an opening at the center thereof; and an operating member for opening and closing the opening of the partition.Type: GrantFiled: December 26, 2001Date of Patent: August 28, 2007Assignee: Japan Science and Technology CorporationInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Patent number: 7247137Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management. The device for collecting skin permeable gas includes a cylindrical member including a spiral groove, a cover disposed on the upper surface of the cylindrical member, a gas-introducing section connected to the cover, a gas delivery section connected to the cover, and a sealing member for sealing the groove of the cylindrical member and for maintaining air contained in the groove at a predetermined temperature. After components in the air maintained at a predetermined temperature are analyzed, the sealing member is detached from the cylindrical member and the cylindrical member from which the sealing member is detached is then brought into intimate contact with skin of a subject to collect the skin permeable gas.Type: GrantFiled: May 12, 2006Date of Patent: July 24, 2007Assignee: Japan Science and Technology CorporationInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Publication number: 20060217634Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management. The device for collecting skin permeable gas includes a cylindrical member including a spiral groove, a cover disposed on the upper surface of the cylindrical member, a gas-introducing section connected to the cover, a gas delivery section connected to the cover, and a sealing member for sealing the groove of the cylindrical member and for maintaining air contained in the groove at a predetermined temperature. After components in the air maintained at a predetermined temperature are analyzed, the sealing member is detached from the cylindrical member and the cylindrical member from which the sealing member is detached is then brought into intimate contact with skin of a subject to collect the skin permeable gas.Type: ApplicationFiled: May 12, 2006Publication date: September 28, 2006Applicant: Japan Science and Technology CorporationInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Publication number: 20060206015Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management. The device for collecting skin permeable gas includes a finger-stall including a coupler, and one or more connections that are connectable with the coupler and include a stopcock.Type: ApplicationFiled: May 12, 2006Publication date: September 14, 2006Applicant: Japan Science and Technology CorporationInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Publication number: 20060206016Abstract: An apparatus for measuring skin permeable gas, which can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management. The device for collecting skin permeable gas includes a container, having an opening, for storing skin permeable gas, a blower fan for circulating the stored skin permeable gas, and a measuring unit including a coloring agent placed in a path through which the gas is circulated with the blower fan.Type: ApplicationFiled: May 12, 2006Publication date: September 14, 2006Applicant: Japan Science and Technology CorporationInventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Publication number: 20040147885Abstract: An apparatus for measuring skin permeable gas is provide, wherein such an apparatus can be used to obtain clinical information by noninvasive and bloodless operations and are useful for in-home medical care and health management.Type: ApplicationFiled: December 9, 2003Publication date: July 29, 2004Inventors: Takao Tsuda, Ken Naitoh, Kazutoshi Nose
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Patent number: 6497213Abstract: A system and method for widening auto-ignition range of a lean burn internal combustion engine employs stratified charge of exhaust gas content and air content. A fuel injection system carries out a first injection of gasoline fuel for dispersion within the air content, and a second injection of gasoline fuel for dispersion within the exhaust gas content. This intelligent injection of gasoline fuel accomplishes auto-ignition of gasoline fuel within the exhaust gas content over extended range of engine speed and load.Type: GrantFiled: May 14, 2001Date of Patent: December 24, 2002Assignee: Nissan Motor Co., Ltd.Inventors: Koudai Yoshizawa, Atushi Teraji, Ken Naitoh
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Patent number: 6401688Abstract: An enhanced auto-ignition in a gasoline internal combustion engine, comprises a fuel injector directly communicating with said combustion chamber for spraying gasoline fuel.Type: GrantFiled: January 26, 2001Date of Patent: June 11, 2002Assignee: Nissan Motor Co., Ltd.Inventors: Atushi Teraji, Ken Naitoh, Koudai Yoshizawa, Eiji Aochi
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Patent number: 6390057Abstract: A compression self-ignition gasoline engine includes a stratifying device stratifying gas in a combustion chamber of the engine, a fuel injector directly injecting fuel in the combustion chamber and a controller connected to the stratifying device and the fuel injector. The controller controlling the stratifying device to produce a high temperature gas layer of a high temperature gas and a low temperature gas layer of a low temperature gas in the combustion chamber. The controller further controls the fuel injector to inject the fuel to both the high temperature gas layer and the low temperature gas layer.Type: GrantFiled: December 13, 2000Date of Patent: May 21, 2002Assignee: Nissan Motor Co., Ltd.Inventors: Koudai Yoshizawa, Ken Naitoh, Atushi Teraji, Eiji Aochi, Hiroshi Miyakubo
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Publication number: 20010045201Abstract: A system and method for widening auto-ignition range of a lean burn internal combustion engine employs stratified charge of exhaust gas content and air content. A fuel injection system carries out a first injection of gasoline fuel for dispersion within the air content, and a second injection of gasoline fuel for dispersion within the exhaust gas content. This intelligent injection of gasoline fuel accomplishes auto-ignition of gasoline fuel within the exhaust gas content over extended range of engine speed and load.Type: ApplicationFiled: May 14, 2001Publication date: November 29, 2001Applicant: NISSAN MOTOR CO., LTD.Inventors: Koudai Yoshizawa, Atushi Teraji, Ken Naitoh
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Publication number: 20010022168Abstract: An enhanced auto-ignition in a gasoline internal combustion engine, comprises a fuel injector directly communicating with said combustion chamber for spraying gasoline fuel.Type: ApplicationFiled: January 26, 2001Publication date: September 20, 2001Inventors: Atushi Teraji, Ken Naitoh, Koudai Yoshizawa, Eiji Aochi
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Patent number: 6267097Abstract: Stroke cycles of a self-igniting gasoline engine (10) comprising an intake stroke, compression stroke, power stroke and exhaust stroke are performed sequentially by a piston (12), and self-ignition of the fuel mixture is performed by compression of the fuel mixture in the compression stroke. The strokes of the piston (12) are detected by a sensor (23), and an electronic control unit (1) controls a valve timing adjustment mechanism (15, 18) so that a sealed period occurs when both an exhaust valve (17) and intake valve (14) are closed in the vicinity of top dead center of the exhaust stroke. The electronic control unit (1) also controls the fuel injection timing of a fuel injector (19) so that fuel is injected into the combustion chamber (11) during the sealed period.Type: GrantFiled: May 11, 2000Date of Patent: July 31, 2001Assignee: Nissan Motor Co., Ltd.Inventors: Tomonori Urushihara, Koji Hiraya, Kazuya Hasegawa, Ken Naitoh, Tsuyoshi Taniyama, Akihiro Ilyama
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Publication number: 20010006054Abstract: A compression self-ignition gasoline engine includes a stratifying device stratifying gas in a combustion chamber of the engine, a fuel injector directly injecting fuel in the combustion chamber and a controller connected to the stratifying device and the fuel injector. The controller controlling the stratifying device to produce a high temperature gas layer of a high temperature gas and a low temperature gas layer of a low temperature gas in the combustion chamber. The controller further controls the fuel injector to inject the fuel to both the high temperature gas layer and the low temperature gas layer.Type: ApplicationFiled: December 13, 2000Publication date: July 5, 2001Inventors: Koudai Yoshizawa, Ken Naitoh, Atushi Teraji, Eiji Aochi, Hiroshi Miyakubo
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Patent number: 5540200Abstract: A fuel injection valve includes a valve body to which liquid to be injected is supplied. A nozzle tip is connected with an end portion of the valve body. A valve member is installed in the valve body to stop and start a supply of the liquid to the nozzle tip. The nozzle tip has first and second nozzle holes which are formed so that fluid injected through the first nozzle hole is collided with fluid injected through the second nozzle hole and that a ratio between a square root of a cross-sectional area of the first nozzle hole and a square root of a cross-sectional area of the second nozzle hole is within a range 1.25 to 3.5. Therefore, the collided fuel is effectively atomized as a result of a resonance phenomenon by the collision.Type: GrantFiled: December 28, 1994Date of Patent: July 30, 1996Assignee: Nissan Motor Co., Ltd.Inventors: Ken Naitoh, Akihiro Iiyama, Satoshi Takeyama, Hiroko Hishinuma, Yasuo Takagi
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Patent number: 5533482Abstract: A fuel injection nozzle for spraying a swirl of fuel, includes a nozzle body having a bore, an orifice communicated with the bore, and a wall defining the bore and the orifice. The bore for receiving an axially movable valve body has a first center axis and the orifice has a second center axis. An inlet open to the bore and an outlet open to outside the nozzle body. The wall includes a first circumferential edge portion defining the inlet of the orifice and a second circumferential edge portion defining the outlet of the orifice. A sprayed fuel body formed by fuel discharged from said orifice, has a third center axis. The first circumferential edge portion is so arranged as to allow the first center axis to be positioned inside the inlet. The second circumferential edge portion is so contoured as to allow at least a portion of the second circumferential edge portion to be out of a plane normal to the second center axis.Type: GrantFiled: May 23, 1995Date of Patent: July 9, 1996Assignee: Nissan Motor Co., Ltd.Inventor: Ken Naitoh