Patents by Inventor Tomonari Chiba
Tomonari Chiba 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: 9856760Abstract: A vane rotor is rotatably placed in an inside of a housing. A lock pin, which is placed in an inside of a receiving hole of the vane rotor, is insertable into a fitting hole formed in a rear plate. A second pressure chamber formed in the fitting hole is communicated with an advancing chamber. An air discharge hole communicates between the second pressure chamber and the atmosphere in a state where the lock pin is inserted into the fitting hole. The air discharge hole blocks communication between the second pressure chamber and the atmosphere in a state where the lock pin is removed from the fitting hole.Type: GrantFiled: June 7, 2016Date of Patent: January 2, 2018Assignee: DENSO CORPORATIONInventors: Tomonari Chiba, Shinsuke Ido
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Publication number: 20160369662Abstract: A vane rotor is rotatably placed in an inside of a housing. A lock pin, which is placed in an inside of a receiving hole of the vane rotor, is insertable into a fitting hole formed in a rear plate. A second pressure chamber formed in the fitting hole is communicated with an advancing chamber. An air discharge hole communicates between the second pressure chamber and the atmosphere in a state where the lock pin is inserted into the fitting hole. The air discharge hole blocks communication between the second pressure chamber and the atmosphere in a state where the lock pin is removed from the fitting hole.Type: ApplicationFiled: June 7, 2016Publication date: December 22, 2016Inventors: Tomonari CHIBA, Shinsuke IDO
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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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Patent number: 7100555Abstract: An outer bottom of an engaging member, which is formed as a tubular shape having a bottom, is contact with an inner wall of a housing existing in the opposite direction of a fitting direction. The engaging member urges and covers one edge of an urging member. As a result, pressure, which the inner wall of the housing receives, can be decreased comparing with the structure, in which the urging member is directly in contact with the inner wall of the housing.Type: GrantFiled: October 31, 2005Date of Patent: September 5, 2006Assignee: Denso CorporationInventors: Tatsuhiko Imaizumi, Tomonari Chiba
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Publication number: 20060090719Abstract: An outer bottom of an engaging member, which is formed as a tubular shape having a bottom, is contact with an inner wall of a housing existing in the opposite direction of a fitting direction. The engaging member urges and covers one edge of an urging member. As a result, pressure, which the inner wall of the housing receives, can be decreased comparing with the structure, in which the urging member is directly in contact with the inner wall of the housing.Type: ApplicationFiled: October 31, 2005Publication date: May 4, 2006Applicant: DENSO CORPORATIONInventors: Tatsuhiko Imaizumi, Tomonari Chiba
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Patent number: 6995644Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: GrantFiled: May 26, 2005Date of Patent: February 7, 2006Assignee: Denso CorporationInventors: Kazuhide Kawai, Norihiro Adachi, Yoshimi Nakase, Tomonari Chiba
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Publication number: 20050212636Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: ApplicationFiled: May 26, 2005Publication date: September 29, 2005Applicant: DENSO CORPORATIONInventors: Kazuhide Kawai, Norihiro Adachi, Yoshimi Nakase, Tomonari Chiba
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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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Patent number: 6930583Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: GrantFiled: July 24, 2003Date of Patent: August 16, 2005Assignee: Denso CorporationInventors: Kazuhide Kawai, Norihiro Adachi, Yoshimi Nakase, 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
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Publication number: 20050109299Abstract: 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: ApplicationFiled: November 19, 2004Publication date: May 26, 2005Applicant: DENSO CORPORATIONInventors: Kinya Takahashi, Tomonari Chiba
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Patent number: 6895933Abstract: During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, the energy amount consumed at each discharge of multiple discharges operation is suppressed toward the minimum requirement, and the consumption of energy accumulated in the ignition device is appropriately controlled. As a result, discharge energy is efficiently consumed at the multiple discharges, thereby compacting the ignition device. Further, the number of multiple discharges is not restricted.Type: GrantFiled: August 26, 2003Date of Patent: May 24, 2005Assignee: Denso CorporationInventors: Tetsuya Miwa, Tomonari Chiba
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Publication number: 20050077990Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: ApplicationFiled: July 24, 2003Publication date: April 14, 2005Inventors: Kazuhide Kawai, Norihiro Adachi, Yoshimi Nakase, Tomonari Chiba
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Publication number: 20040040535Abstract: During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, energy amount consumed at each discharge of multiple discharges operation is suppressed toward the minimum requirement, and consumption of energy accumulated in the ignition device is appropriately controlled. As a result, discharge energy is efficiently consumed at the multiple discharges, thereby compacting the ignition device. Further, the number of multiple discharges is not restricted.Type: ApplicationFiled: August 26, 2003Publication date: March 4, 2004Applicant: Denso CorporationInventors: Tetsuya Miwa, Hideki Kawamura, Tomonari Chiba
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Patent number: 6694959Abstract: During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, the energy amount consumed at each discharge of the multiple discharges operation is suppressed toward the minimum requirement, and the consumption of energy accumulated in the ignition device is appropriately controlled. As a result, discharge energy is efficiently consumed at the multiple discharges, thereby compacting the ignition device. Further, the number of multiple discharges is not restricted.Type: GrantFiled: November 16, 2000Date of Patent: February 24, 2004Assignee: Denso CorporationInventors: Tetsuya Miwa, Hideki Kawamura, Tomonari Chiba
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Publication number: 20030122645Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: ApplicationFiled: December 17, 2002Publication date: July 3, 2003Applicant: DENSO CORPORATIONInventors: Kazutoyo Oosuka, Keisuke Kawano, Hiroyuki Wakabayashi, Akimitsu Sugiura, Tomonori Ishikawa, Naruhiko Inayoshi, Masahiko Aoyama, Tomonari Chiba, Katsuhisa Kato
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Patent number: 6525636Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: GrantFiled: August 9, 2000Date of Patent: February 25, 2003Assignee: Denso CorporationInventors: Kazutoyo Oosuka, Keisuke Kawano, Hiroyuki Wakabayashi, Akimitsu Suguira, Naruhiko Inayosi, Tomonari Chiba, Katsuhisa Kato
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Patent number: 6252482Abstract: A high voltage post terminal is accurately located within a support aperture during manufacturing processes by at least one inwardly directed projection to avoid assembly problems caused by sizing the entire aperture itself to locate the terminal with sufficient accuracy. By thus improving the concentricity of the high voltage coil components it is possible to achieve more reliable insulation between components at even relatively small-sized coils used for individual engine plug holes. An especially advantageous range of critical parameters has been discovered as achievable by using this more reliable manufacturing process.Type: GrantFiled: December 10, 1998Date of Patent: June 26, 2001Assignee: Denso CorporationInventors: Tomonari Chiba, Kazutoyo Oosuka, Keiichi Okazaki, Hiromitsu Oonishi, Masahiko Aoyama
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Patent number: 6208231Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.Type: GrantFiled: February 13, 1998Date of Patent: March 27, 2001Assignee: Denso CorporationInventors: Kazutoyo Oosuka, Keisuke Kawano, Hiroyuki Wakabayashi, Akimitsu Sugiura, Tomonori Ishikawa, Naruhiko Inayosi, Masahiko Aoyama, Kazuhide Kawai, Norihiro Adachi, Yoshimi Nakase, Yoshitaka Sato, Tomonari Chiba, Katsuhisa Kato