Patents by Inventor Hiromu Kikawa
Hiromu Kikawa 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: 8573041Abstract: An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage 501 bypassing a bypass passage 205 is formed and a humidity sensing device 500 is mounted in the second bypass passage 501. A second bypass passage inlet 502 and a second bypass passage outlet 503 formed in a wall surface of the bypass passage 205 are opened parallel to the direction of flow of air flowing in the bypass passage 205.Type: GrantFiled: December 8, 2011Date of Patent: November 5, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takayuki Saito, Takayuki Yogo, Shinya Igarashi, Hiromu Kikawa
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Publication number: 20120079879Abstract: An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage 501 bypassing a bypass passage 205 is formed and a humidity sensing device 500 is mounted in the second bypass passage 501. A second bypass passage inlet 502 and a second bypass passage outlet 503 formed in a wall surface of the bypass passage 205 are opened parallel to the direction of flow of air flowing in the bypass passage 205.Type: ApplicationFiled: December 8, 2011Publication date: April 5, 2012Applicant: Hitachi Automotive Systems, Ltd.Inventors: Takayuki SAITO, Takayuki Yogo, Shinya Igarashi, Hiromu Kikawa
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Patent number: 8091413Abstract: An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage bypassing a bypass passage is formed and a humidity sensing device is mounted in the second bypass passage. A second bypass passage inlet and a second bypass passage outlet formed in a wall surface of the bypass passage are opened parallel to the direction of flow of air flowing in the bypass passage.Type: GrantFiled: July 23, 2009Date of Patent: January 10, 2012Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takayuki Saito, Takayuki Yogo, Shinya Igarashi, Hiromu Kikawa
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Patent number: 7942053Abstract: An air flow measuring instrument, comprising: an auxiliary passage 8 arranged inside a main passage through which fluid flows, a tabular member 5 on which a pattern of a heating resistor for measuring an air flow is provided on one face 5a, the tabular member being disposed inside the auxiliary passage so that the one face 5a on which the heating resistor pattern of the tabular member is provided is disposed along a flow of fluid inside the auxiliary passage 8, a heating resistor pattern-side fluid passage 8a portion formed so that the fluid flows between the face 5a and a passage-forming surface 8d of the auxiliary passage, and a back-surface 8b side fluid passage portion formed so that fluid flows between a face 5b on a side opposite to the face of the tabular member and the passage-forming surface of the auxiliary passage. Guidance portion 13 guiding dust that collides against the end portion to back-surface side fluid passage portion 8b side is provided on upstream-side end of tabular member.Type: GrantFiled: October 30, 2008Date of Patent: May 17, 2011Assignee: Hitachi, Ltd.Inventors: Naoki Saito, Takeshi Morino, Yuki Okamoto, Keiji Hanzawa, Hiromu Kikawa, Akio Yasukawa
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Patent number: 7805990Abstract: For arranging an air mass meter at a flow channel, the flow channel has a housing section with a flange surrounding a receiving opening for the air mass meter. The air mass meter has a socket with a contact surface that is facing the flange. Fasteners are provided that attach the socket on the housing section. The socket and the housing section have elements for positioning the air mass meter free of play relative to a flow direction of a fluid flow that is guided in the flow channel.Type: GrantFiled: February 24, 2007Date of Patent: October 5, 2010Assignees: Mann + Hummel GmbH, Hitachi, Ltd.Inventors: Jürgen Lang, Eric Thebault, Robert Hasenfratz, Masayuki Kozawa, Hiromu Kikawa
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Publication number: 20100031737Abstract: An arrangement of a mass intake air flow measurement device suitable for integrating a humidity sensing device as well as a temperature sensing device and a pressure sensing device is provided. A second bypass passage 501 bypassing a bypass passage 205 is formed and a humidity sensing device 500 is mounted in the second bypass passage 501. A second bypass passage inlet 502 and a second bypass passage outlet 503 formed in a wall surface of the bypass passage 205 are opened parallel to the direction of flow of air flowing in the bypass passage 205.Type: ApplicationFiled: July 23, 2009Publication date: February 11, 2010Applicant: Hitachi Automotive Systems, Ltd.Inventors: Takayuki SAITO, Takayuki Yoho, Shinaya Igarashi, Hiromu Kikawa
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Patent number: 7559237Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: GrantFiled: April 29, 2008Date of Patent: July 14, 2009Assignees: Hitachi Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Publication number: 20090126477Abstract: An air flow measuring instrument, comprising: an auxiliary passage 8 arranged inside a main passage through which fluid flows, a tabular member 5 on which a pattern of a heating resistor for measuring an air flow is provided on one face 5a, the tabular member being disposed inside the auxiliary passage so that the one face 5a on which the heating resistor pattern of the tabular member is provided is disposed along a flow of fluid inside the auxiliary passage 8, a heating resistor pattern-side fluid passage 8a portion formed so that the fluid flows between the face 5a and a passage-forming surface 8d of the auxiliary passage, and a back-surface 8b side fluid passage portion formed so that fluid flows between a face 5b on a side opposite to the face of the tabular member and the passage-forming surface of the auxiliary passage. Guidance portion 13 guiding dust that collides against the end portion to back-surface side fluid passage portion 8b side is provided on upstream-side end of tabular member.Type: ApplicationFiled: October 30, 2008Publication date: May 21, 2009Applicant: Hitachi, Ltd.Inventors: Naoki Saito, Takeshi Morino, Yuki Okamoto, Keiji Hanzawa, Hiromu Kikawa, Akio Yasukawa
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Publication number: 20090095069Abstract: For arranging an air mass meter at a flow channel, the flow channel has a housing section with a flange surrounding a receiving opening for the air mass meter. The air mass meter has a socket with a contact surface that is facing the flange. Fasteners are provided that attach the socket on the housing section. The socket and the housing section have elements for positioning the air mass meter free of play relative to a flow direction of a fluid flow that is guided in the flow channel.Type: ApplicationFiled: February 24, 2007Publication date: April 16, 2009Applicants: MANN+HUMMEL GMBH, HITACHI LTD.Inventors: Jurgen Lang, Eric Thebault, Robert Hasenfratz, Masayuki Kozawa, Hiromu Kikawa
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Publication number: 20090064968Abstract: It is an object of the present invention to expand an air flow measuring range of a thermal type air flow measuring instrument. A squeeze 157 is provided upstream of a thermal type air flow measuring instrument 100 of a main air passage 155 to expand an air flow measuring range on the low flow rate side. Furthermore, a slit 158 is provided to introduce air from the outside of the main air passage 155 to a position downstream of the squeeze 157 where flow exfoliation occurs without passing thorough a main air passage inlet 156 to prevent a pressure drop from increasing at a high flow rate and expand the air flow measuring range on the high flow rate side.Type: ApplicationFiled: August 12, 2008Publication date: March 12, 2009Inventors: Taiji Shoyama, Yasuhiro Asano, Hiromu Kikawa, Chihiro Kobayashi
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Patent number: 7469582Abstract: A heating resistor type flow measuring device comprising a housing having a support part provided between a frame body and a connector and connected to the mounting part of a fluid passage, a flow rate detection element held on the frame body side of the housing, and an electronic circuit held on the housing and connected electrically to the flow rate detection element and the connector, wherein the electronic circuit is held on the frame body side of the housing and positioned in the fluid passage, a member with the rigidity higher than the material of the main structural member of the housing is formed integrally with the support part, the housing is fixed to the fluid passage through the member with high rigidity. A metal plate is inserted into the support part so as to increase rigidity.Type: GrantFiled: October 1, 2007Date of Patent: December 30, 2008Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Naoki Saito, Masayuki Kozawa, Shinya Igarashi, Hiromu Kikawa, Akio Yasukawa, Akira Takasago
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Publication number: 20080202230Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: ApplicationFiled: April 29, 2008Publication date: August 28, 2008Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Patent number: 7377161Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: GrantFiled: April 3, 2007Date of Patent: May 27, 2008Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Patent number: 7373815Abstract: A thermal type air flow measuring instrument has a molded part formed by integral molding with a metal plate. A slot or opening allowing only a resin to pass through the same is formed in the metal plate in an area subjected to higher stresses. A part of the connector terminals are disposed in the vicinity of an area where the resin has a larger thickness and the temperature difference between the inside and the outside of the resin is locally increased. The injecting direction is set to prevent a weld line and a void from being generated. For the molded part with the metal plate inserted therein, the occurrence of cracks is minimized. Further, an increase of the fatigue crack growth rate is decreased.Type: GrantFiled: August 15, 2005Date of Patent: May 20, 2008Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Masayuki Kozawa, Shinya Igarashi, Nobuhito Hiramatsu, Naoki Saito, Hiromu Kikawa
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Publication number: 20070169548Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: ApplicationFiled: April 3, 2007Publication date: July 26, 2007Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Patent number: 7216535Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: GrantFiled: June 13, 2006Date of Patent: May 15, 2007Assignees: Hitachi, Ltd., Hitachi car Engineering Co., Ltd.Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Patent number: 7201047Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.Type: GrantFiled: May 24, 2005Date of Patent: April 10, 2007Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiromu Kikawa, Izumi Watanabe, Shinya Igarashi, Keiichi Nakada, Kei Ueyama
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Patent number: 7201046Abstract: An air temperature detector 12 is disposed close to an auxiliary passage sidewall 15, which has an auxiliary passage wall hole 9 formed near the air temperature detector 12. A heat-sensitive resistor 13 is also disposed close to the auxiliary passage sidewall 15, which has an auxiliary passage wall hole 10 formed near the heat-sensitive resistor 13. Further, a resistor heater 14 is disposed close to an auxiliary passage sidewall 16, which has an auxiliary passage wall hole 11 near the resistor heater 14.Type: GrantFiled: February 21, 2001Date of Patent: April 10, 2007Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiromu Kikawa, Shinya Igarashi, Masayuki Kozawa, Naoki Saitou, Takayuki Saitou
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Patent number: D674300Type: GrantFiled: July 14, 2011Date of Patent: January 15, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takayuki Saito, Hiromu Kikawa, Keiji Hanzawa
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Patent number: D674301Type: GrantFiled: July 14, 2011Date of Patent: January 15, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takayuki Saito, Hiromu Kikawa, Keiji Hanzawa