Patents by Inventor Kinya Takahashi
Kinya Takahashi 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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Publication number: 20160263659Abstract: A coated cutting tool includes a substrate and a coating layer formed onto the surface of the substrate. The coating layer contains an ?-type aluminum oxide layer. A residual stress value at the (116) plane of the ?-type aluminum oxide layer is greater than 0. A residual stress value at the (012) plane of the ?-type aluminum oxide layer is smaller than 0.Type: ApplicationFiled: November 7, 2014Publication date: September 15, 2016Applicant: TUNGALOY CORPORATIONInventors: KINYA TAKAHASHI, Hiroyuki SATOH
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Publication number: 20150034032Abstract: In a valve timing adjusting device, a vane rotor includes a second supply oil passage connectable to a first supply oil passage of a second shaft. A check valve is provided between the vane rotor and the second shaft, and permits a flow from the first supply oil passage toward the second supply oil passage and prevents a flow from the second supply oil passage toward the first supply oil passage. A fixing unit is provided between the check valve and the second shaft, and fixes the check valve between the fixing unit and the vane rotor. The fixing unit includes a third supply oil passage which connects the first supply oil passage and the second supply oil passage. A filter is provided for the fixing unit and can capture foreign substances flowing through the third supply oil passage.Type: ApplicationFiled: July 22, 2014Publication date: February 5, 2015Inventors: Tomonobu IKUMA, Kinya TAKAHASHI, Eiji ISOBE
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Patent number: 7931000Abstract: A first one-way valve is provided in a first advance passage connecting a hydraulic pump to a control advance chamber. A second one-way valve is provided in a first retard passage connecting the hydraulic pump to a control retard chamber. A first control valve is provided in a second advance passage to bypass the first one-way valve for communication of the first advance passage. A second control valve is provided in a second retard passage to bypass the second one-way valve for communication of the first retard passage. The first control valve operates by the pilot pressure to close the second advance passage at advance controlling and opening it at retard controlling. The second control valve operates by the pilot pressure to close the second retard passage at retard controlling and open it at advance controlling.Type: GrantFiled: April 5, 2007Date of Patent: April 26, 2011Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Masayasu Ushida, Kinya Takahashi, Takao Nojiri, Seiji Yaoko, Jun Yamada
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Publication number: 20100251980Abstract: A first one-way valve is provided in a first advance passage connecting a hydraulic pump to a control advance chamber. A second one-way valve is provided in a first retard passage connecting the hydraulic pump to a control retard chamber. A first control valve is provided in a second advance passage to bypass the first one-way valve for communication of the first advance passage. A second control valve is provided in a second retard passage to bypass the second one-way valve for communication of the first retard passage. The first control valve operates by the pilot pressure to close the second advance passage at advance controlling and opening it at retard controlling. The second control valve operates by the pilot pressure to close the second retard passage at retard controlling and open it at advance controlling.Type: ApplicationFiled: April 5, 2007Publication date: October 7, 2010Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Masayasu Ushida, Kinya Takahashi, Takao Nojiri, Seiji Yaoko, Jun Yamada
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Patent number: 7610884Abstract: A first-side check valve prevents a hydraulic fluid from being discharged out of a retard chamber, and a second-side check valve prevents the hydraulic fluid from being discharged out of an advance chamber. A first-side control valve opens or closes a first-side discharge passage by a pilot pressure received through a retard pilot passage. A second-side control valve opens or closes a second-side discharge passage by the pilot pressure received through an advance pilot passage. Another check valve is disposed in a supply passage between a phase switch valve and a branch point, at which a supply passage is branched.Type: GrantFiled: September 12, 2007Date of Patent: November 3, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Patent number: 7506621Abstract: A phase control valve, which supplies a drive hydraulic pressure to an advance chamber or a retard chamber, is integrated with a drain switch valve, which controls opening and closing of an advance drain control valve and opening and closing of a retard drain control valve, to form a solenoid spool valve. The advance drain control valve is provided in an advance check valve bypass passage, which bypasses an advance check valve, and is driven by a pilot hydraulic pressure to open and close the advance check valve bypass passage. The retard drain control valve is provided in a retard check valve bypass passage, which bypasses a retard check valve, and is driven by a pilot hydraulic pressure to open and close the retard check valve bypass passage.Type: GrantFiled: September 12, 2007Date of Patent: March 24, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Patent number: 7506622Abstract: One of retard passages, which supplies working fluid to one of retard chambers, is a dedicated passage. The other remaining retard passages, which supply the working fluid to the other remaining retard chambers, are branch passages, which are branched from a retard passage that serves as a supply passage. With this construction, a flow quantity of working fluid per unit time supplied from the one of retard passages to the one of retard chambers becomes larger than a flow quantity of working fluid per unit time supplied from the other remaining retard passages to the other remaining retard chambers. Thus, the one of retard chambers can be filled with the working fluid earlier than the other remaining retard chambers.Type: GrantFiled: September 12, 2007Date of Patent: March 24, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Publication number: 20090071424Abstract: A boss portion of a vane rotor includes a tapered outer wall surface, which is tilted relative to an axis of the boss portion. A housing member includes a tapered inner wall surface that contacts the tapered outer wall surface. A seal member is provided at one axial end surface of the vane rotor on one axial side of the vane rotor, toward which the vane rotor urges the housing member by an interaction between the tapered outer wall surface of the supporting portion and the tapered inner wall surface of the housing member.Type: ApplicationFiled: August 27, 2008Publication date: March 19, 2009Applicant: DENSO CORPORATIONInventors: Akihiko TAKENAKA, Kinya TAKAHASHI
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Publication number: 20080257288Abstract: A first-side check valve prevents a hydraulic fluid from being discharged out of a retard chamber, and a second-side check valve prevents the hydraulic fluid from being discharged out of an advance chamber. A first-side control valve opens or closes a first-side discharge passage by a pilot pressure received through a retard pilot passage. A second-side control valve opens or closes a second-side discharge passage by the pilot pressure received through an advance pilot passage. Another check valve is disposed in a supply passage between a phase switch valve and a branch point, at which a supply passage is branched.Type: ApplicationFiled: September 12, 2007Publication date: October 23, 2008Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Kinya TAKAHASHI, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Publication number: 20080173267Abstract: A valve timing control apparatus controls a valve timing of intake/exhaust valve of an engine. The apparatus includes a housing rotated with a driving shaft. The housing has a chamber house accommodating a vane rotor rotative with a driven shaft to retard and advance sides relative to the housing by being exerted with hydraulic pressure in retard and advance chambers in the chamber house. A filter is provided for removing foreign matters in a fluid passage extending from a slidable portion between the driven shaft and a bearing toward both the housing and the vane rotor through a connected portion between the driven shaft and the vane rotor. The filter is provided on the side of both the housing and the vane rotor with respect to the slidable portion.Type: ApplicationFiled: December 17, 2007Publication date: July 24, 2008Applicant: DENSO CORPORATIONInventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri
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Publication number: 20080066572Abstract: A phase control valve, which supplies a drive hydraulic pressure to an advance chamber or a retard chamber, is integrated with a drain switch valve, which controls opening and closing of an advance drain control valve and opening and closing of a retard drain control valve, to form a solenoid spool valve. The advance drain control valve is provided in an advance check valve bypass passage, which bypasses an advance check valve, and is driven by a pilot hydraulic pressure to open and close the advance check valve bypass passage. The retard drain control valve is provided in a retard check valve bypass passage, which bypasses a retard check valve, and is driven by a pilot hydraulic pressure to open and close the retard check valve bypass passage.Type: ApplicationFiled: September 12, 2007Publication date: March 20, 2008Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Publication number: 20080060471Abstract: One of retard passages, which supplies working fluid to one of retard chambers, is a dedicated passage. The other remaining retard passages, which supply the working fluid to the other remaining retard chambers, are branch passages, which are branched from a retard passage that serves as a supply passage. With this construction, a flow quantity of working fluid per unit time supplied from the one of retard passages to the one of retard chambers becomes larger than a flow quantity of working fluid per unit time supplied from the other remaining retard passages to the other remaining retard chambers. Thus, the one of retard chambers can be filled with the working fluid earlier than the other remaining retard chambers.Type: ApplicationFiled: September 12, 2007Publication date: March 13, 2008Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaokou, Jun Yamada
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Patent number: 7290510Abstract: A valve timing adjusting apparatus has a housing and a vane rotor to form multiple fluid chambers, and a relative position of the vane rotor to the housing is adjusted by the fluid pressure supplied into the fluid chambers. A check valve is provided in a branched passage portion, so that working fluid may not be pushed out from an advancing fluid chamber to a low pressure side, even when the working fluid in the advancing fluid chamber is temporally compressed to increase its fluid pressure due to a torque change applied from a cam shaft to the vane rotor.Type: GrantFiled: November 15, 2006Date of Patent: November 6, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaoko, Jun Yamada
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Patent number: 7240650Abstract: A valve timing adjusting apparatus for an engine comprises a housing unit and a vane rotor rotatably housed in the housing unit. The housing unit comprises a front plate, a shoe housing and a sprocket, wherein those elements are fixed to each other. A position determination pin is inserted through a through hole formed in the shoe housing and into a tapered hole formed in the sprocket, to position the shoe housing at a desired position with respect to the sprocket. Since a forward end of the position determination pin is brought into contact with an inner surface of the tapered hole, the positioning of the shoe housing with respect to the sprocket can be surely attained.Type: GrantFiled: November 19, 2004Date of Patent: July 10, 2007Assignee: DENSO CorporationInventors: Tatsuhiko Imaizumi, Kinya Takahashi, Tomonari Chiba
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Publication number: 20070107684Abstract: A valve timing adjusting apparatus has a housing and a vane rotor to form multiple fluid chambers, and a relative position of the vane rotor to the housing is adjusted by the fluid pressure supplied into the fluid chambers. A check valve is provided in a branched passage portion, so that working fluid may not be pushed out from an advancing fluid chamber to a low pressure side, even when the working fluid in the advancing fluid chamber is temporally compressed to increase its fluid pressure due to a torque change applied from a cam shaft to the vane rotor.Type: ApplicationFiled: November 15, 2006Publication date: May 17, 2007Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Kinya Takahashi, Masayasu Ushida, Takao Nojiri, Seiji Yaoko, Jun Yamada
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Patent number: 7182052Abstract: A shoe housing receives a driving force from a crankshaft and a vane rotor rotates with a camshaft in combination. The vane rotor is received in the shoe housing in such a way as to freely turn. Each of the vanes of the vane rotor partitions each of three receiving chambers into a retard hydraulic chamber and an advance hydraulic chamber. A check valve is disposed in an advance supply passage. The check valve allows a working oil to flow from an oil pump through the advance supply passage to the advance hydraulic chamber and prohibits the working oil from flowing back from the advance hydraulic chamber through the advance supply passage to a drain.Type: GrantFiled: June 24, 2005Date of Patent: February 27, 2007Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Seiji Yaoko, Jun Yamada, Kinya Takahashi, Masayasu Ushida, Mitomu Mohri, Takao Nojiri
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Publication number: 20070028973Abstract: A plurality of directional control valves are included in a valve main body 1. Each of the directional control valves is provided with a spool 2, actuator ports 3,4, a communication passage 7, a parallel passage 6, a tandem passage 5, a first check valve 8 for permitting a flow of pressure fluid from the parallel passage 6 toward the communication passage 7, and a second check valve 9 for permitting a flow of pressure fluid from the tandem passage 5 toward the communication passage 7. For example, the first check valve 8 is slidably arranged in the second check valve 9, the second check valve 9 is provided with a through-hole 14 formed in communication with the communication passage 7, and a plug 11 is arranged in threaded engagement with the valve main body 1 such that an end portion of the first check valve 8 and an end portion of the second check valve 9 are covered by the plug 11.Type: ApplicationFiled: August 2, 2004Publication date: February 8, 2007Applicant: Hitachi Construction Machinery Co., Ltd.Inventors: Yoshinobu Kobayashi, Katsumi Ueno, Rindou Morikawa, Hiroshi Matsuzaki, Kinya Takahashi
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Publication number: 20050284433Abstract: A shoe housing receives a driving force from a crankshaft and a vane rotor rotates with a camshaft in combination. The vane rotor is received in the shoe housing in such a way as to freely turn. Each of the vanes of the vane rotor partitions each of three receiving chambers into a retard hydraulic chamber and an advance hydraulic chamber. A check valve is disposed in an advance supply passage. The check valve allows a working oil to flow from an oil pump through the advance supply passage to the advance hydraulic chamber and prohibits the working oil from flowing back from the advance hydraulic chamber through the advance supply passage to a drain.Type: ApplicationFiled: June 24, 2005Publication date: December 29, 2005Applicants: DENSO CORPORATION, NIPPON SOKEN INC.Inventors: Seiji Yaoko, Jun Yamada, Kinya Takahashi, Masayasu Ushida, Mitomu Mohri, Takao Nojiri
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Patent number: 6932039Abstract: A valve timing adjusting apparatus comprises a first rotating body adjusting the opening/closing timing of the intake valves, and a second rotating body adjusting the opening/closing timing of exhaust valves. A first and a second driving force transmitting members respectively have first and second endless members for power transmission. The peripheral shape of the second rotating body comprises a circumferential shape portion and cutoff shape portions whose distance from the center of rotation is smaller than the circumferential shape portion's. When the first and second rotating bodies are assembled to an internal combustion engine, the cutoff shape portions are positioned in such a rotation angle position that the first endless member for power transmission can be inserted into the gap between the first and second rotating bodies.Type: GrantFiled: November 19, 2004Date of Patent: August 23, 2005Assignee: Denso CorporationInventors: Kinya Takahashi, Tomonari Chiba
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Publication number: 20050115528Abstract: A valve timing adjusting apparatus for an engine comprises a housing unit and a vane rotor rotatably housed in the housing unit. The housing unit comprises a front plate, a shoe housing and a sprocket, wherein those elements are fixed to each other. A position determination pin is inserted through a through hole formed in the shoe housing and into a tapered hole formed in the sprocket, to position the shoe housing at a desired position with respect to the sprocket. Since a forward end of the position determination pin is brought into contact with an inner surface of the tapered hole, the positioning of the shoe housing with respect to the sprocket can be surely attained.Type: ApplicationFiled: November 19, 2004Publication date: June 2, 2005Applicant: DENSO CORPORATIONInventors: Tatsuhiko Imaizumi, Kinya Takahashi, Tomonari Chiba