Patents by Inventor Takeshi Kuwahara
Takeshi Kuwahara 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: 9096218Abstract: It is provided a control device of a vehicle power transmission device including: a torque limiter device blocking transmission of a torque amount exceeding a predetermined torque with operation involving differential rotation between a first rotating member and a second rotating member; and an electric motor coupled to one of the first rotating member and the second rotating member in a power transmittable manner, wherein when a rotation speed difference is generated between the first rotating member and the second rotating member due to the operation of the torque limiter device, the electric motor is operated so as to suppress the rotation speed difference.Type: GrantFiled: May 21, 2010Date of Patent: August 4, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takeshi Kitahata, Tatsuo Obata, Hiromichi Kimura, Takeshi Kuwahara, Toru Saito, Masahiro Tanae
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Publication number: 20150081782Abstract: A method and apparatus for selecting a client computer as a relay server to rebroadcast common application information that is broadcast from a server system over a network. The client computer is selected randomly to rebroadcast the User Datagram Protocol (UDP) information received from the server system and client computers receiving the UDP information from another client computer relay server on the network do not rebroadcast the information. If the client computer selected to rebroadcast the common information fails to rebroadcast, another client computer is randomly selected as a relay server and takes over rebroadcasting the common information.Type: ApplicationFiled: November 26, 2014Publication date: March 19, 2015Inventors: Kenji Kobayashi, Takeshi Kuwahara
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Publication number: 20150060179Abstract: A vehicle front structure includes: a power unit provided on a front part of a vehicle; a front side member which is arranged outside the power unit in a vehicle width direction and which extends in a vehicle longitudinal direction; and a load receiving portion which is provided on a side portion on a front side member side of the power unit and which is located inside the front side member in a vehicle width direction while stiffness thereof in the vehicle width direction is higher than other location of the side portion.Type: ApplicationFiled: September 2, 2014Publication date: March 5, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Michitaka Tsuchida, Shunsuke Hayashi, Tatsuo Obata, Kazuaki Ishiura, Takeshi Kuwahara
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Patent number: 8930445Abstract: A method and apparatus for selecting a client computer as a relay server to rebroadcast common application information that is broadcast from a server system over a network. The client computer is selected randomly to rebroadcast the User Datagram Protocol (UDP) information received from the server system and client computers receiving the UDP information from another client computer relay server on the network do not rebroadcast the information. If the client computer selected to rebroadcast the common information fails to rebroadcast, another client computer is randomly selected as a relay server and takes over rebroadcasting the common information.Type: GrantFiled: September 14, 2011Date of Patent: January 6, 2015Assignee: International Business Machines CorporationInventors: Kenji Kobayashi, Takeshi Kuwahara
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Patent number: 8905885Abstract: A vehicle drive device configured with reduced axial dimensions, while still having appropriate lubrication. The vehicle drive device is configured with an input shaft coupled to an engine, a rotary electric machine, and an output shaft coupled to wheels. A power transfer mechanism couples input shaft, the rotary electric machine, and the output shaft. A case houses at least the rotary electric machine and the power transfer mechanism. An oil reserving portion capable of reserving oil supplied by rotation of the power transfer mechanism is provided above the rotor shaft inside the case. A communication oil passage is oriented between the oil reserving portion and an inner circumferential space formed inside the rotor shaft. The rotor shaft is disposed to be inserted into the inside housing space, and has a supply communication hole that communicates between the inner circumferential space and the inside housing space.Type: GrantFiled: January 30, 2012Date of Patent: December 9, 2014Assignees: Aisin Aw Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Yoshihisa Yamamoto, Masamitsu Seno, Takuya Komatsu, Natsuki Sada, Hirotaka Yata, Tomoo Atarashi, Hiromichi Kimura, Takeshi Kuwahara, Tatsuo Obata, Michitaka Tsuchida, Yoshinori Morita, Shingo Kato
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Publication number: 20140341757Abstract: A plate is interposed between a rear cover and a pump body. The pump chamber is formed between the plate and the pump body.Type: ApplicationFiled: November 29, 2012Publication date: November 20, 2014Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuo Obata, Hiromichi Kimura, Takeshi Kuwahara, Katsuhide Kitagawa, Kunio Morisawa, Masamitsu Seno, Hirotaka Yata, Tomoo Atarashi
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Publication number: 20140285045Abstract: A vehicular drive system is provided with at least one electric motor and a bevel gear portion which are accommodated within a casing formed by a plurality of casing members fixed to each other, wherein: said casing includes a first casing member to which a stator of each of said at least one electric motor is fixed, and a second casing member which is fixed to said first casing member so as to cooperate with said first casing member to form a space accommodating said at least one electric motor and which has a support portion supporting said bevel gear portion; and a rotor of said each electric motor is rotatably supported at opposite ends thereof by said first casing member and said second casing member, respectively, while said bevel gear portion is rotatably supported by said second casing member through said support portion.Type: ApplicationFiled: July 19, 2011Publication date: September 25, 2014Inventors: Tatsuo Obata, Kunio Morisawa, Tsuyoshi Kitahata, Takeshi Kuwahara, Hiromichi Kimura, Masahiro Tanae, Toru Saitou
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Publication number: 20140245860Abstract: A vehicle drive device includes: a transaxle case including a tubular case opened in at least one end portion and a cover fixed to an opening portion of the tubular case to close an opening of the tubular case, the transaxle case housing a transmission; and a mount device attached between the cover of the transaxle case and a vehicle body to support the transaxle case, the mount device including a support plate member fixedly disposed on the cover, the support plate member being fastened by at least three first fastening members through the cover to the opening portion of the tubular case.Type: ApplicationFiled: October 14, 2011Publication date: September 4, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromichi Kimura, Takeshi Kuwahara, Taturou Obata, Yoshinori Morita, Shingo Katou, Takeshi Kitahata, Takuya Kodama
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Publication number: 20140158467Abstract: A power transmission device has a first check valve and a second check valve on the respective discharge passages. An oil temperature sensor is disposed at a position that is vertically lower than an oil-introducing portion of a merging section.Type: ApplicationFiled: December 4, 2013Publication date: June 12, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki KIMURA, Akiko NISHIMINE, Takeshi KUWAHARA, Ryota TAKAYANAGI
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Patent number: 8720660Abstract: Disclosed is a parking lock mechanism of a power transmission apparatus which can stably supply lubrication oil to the sliding surface of a parking cam to decrease the sliding resistance of the parking cam. The parking lock mechanism 52 includes a support portion 73 for positioning a sleeve 71 with respect to an extension housing 6, and a first guide rib 74 provided on the support portion 73 for catching oil circulating in a transaxle case 4 to supply the oil to the support portion 73. The sleeve 71 has an upper portion formed with a notch 71c for allowing a parking pawl 62 to be held in abutment with a parking cam 61. The oil caught by the first guide rib 74 is supplied through the support portion 73 and the notch 71c of the sleeve 71 to the sliding surface of the parking cam 61, viz., the sliding surface between the parking pawl 62 and the parking cam 61 and the sliding surface between the parking cam 61 and the sleeve 71.Type: GrantFiled: May 10, 2010Date of Patent: May 13, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiromichi Kimura, Michitaka Tsuchida, Takeshi Kitahata, Tatsuo Obata, Yosuke Suzuki, Takeshi Kuwahara
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Patent number: 8668612Abstract: In a lubrication structure of a differential gear unit, a case has a guide rib that extends over a certain area with respect to a rotation path of a head of a bolt when a ring gear rotates, and that protrudes out from the case toward the head of the bolt. Also, a through-hole that extends in a vertical direction is formed in an upper portion of a hollow supporting portion, and the guide rib has an oil reservoir that curves toward an upper end opening of the through-hole.Type: GrantFiled: March 29, 2011Date of Patent: March 11, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiromichi Kimura, Takeshi Kuwahara, Takeshi Kitahata, Tatsuo Obata, Masahiro Tanae
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Publication number: 20130283972Abstract: A vehicle drive device configured with reduced axial dimensions, while still having appropriate lubrication. The vehicle drive device is configured with an input shaft coupled to an engine, a rotary electric machine, and an output shaft coupled to wheels. A power transfer mechanism couples input shaft, the rotary electric machine, and the output shaft. A case houses at least the rotary electric machine and the power transfer mechanism. An oil reserving portion capable of reserving oil supplied by rotation of the power transfer mechanism is provided above the rotor shaft inside the case. A communication oil passage is oriented between the oil reserving portion and an inner circumferential space formed inside the rotor shaft. The rotor shaft is disposed to be inserted into the inside housing space, and has a supply communication hole that communicates between the inner circumferential space and the inside housing space.Type: ApplicationFiled: January 30, 2012Publication date: October 31, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Yoshihisa Yamamoto, Masamitsu Seno, Takuya Komatsu, Natsuki Sada, Hirotaka Yata, Tomoo Atarashi, Hiromichi Kimura, Takeshi Kuwahara, Tatsuo Obata, Michitaka Tsuchida, Yoshinori Morita, Shingo Kato
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Patent number: 8527130Abstract: A hybrid drive apparatus includes: a drive power source that includes an internal combustion engine, a first electric motor, and a second electric motor; a power transmission mechanism that includes a carrier, a sun gear, and a ring gear, and that is configured to rotate the output shaft of the internal combustion engine by the first electric motor; and plural bearings that each includes an outer ring member and an inner ring member fitted to the outer ring member through a rolling element, and that are provided apart from each other in an axial direction of the output shaft with the carrier being positioned between the bearings. An inner periphery of the outer ring member is positioned more inward in a radial direction of the ring gear relative to a meshing portion between inner teeth of the ring gear and outer teeth of one of the pinion gears.Type: GrantFiled: November 29, 2011Date of Patent: September 3, 2013Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.Inventors: Takeshi Kitahata, Tatsuo Obata, Takeshi Kuwahara, Hiromichi Kimura, Toru Saito, Masahiro Tanae
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Publication number: 20130134010Abstract: Disclosed is a parking lock mechanism of a power transmission apparatus which can stably supply lubrication oil to the sliding surface of a parking cam to decrease the sliding resistance of the parking cam. The parking lock mechanism 52 includes a support portion 73 for positioning a sleeve 71 with respect to an extension housing 6, and a first guide rib 74 provided on the support portion 73 for catching oil circulating in a transaxle case 4 to supply the oil to the support portion 73. The sleeve 71 has an upper portion formed with a notch 71c for allowing a parking pawl 62 to be held in abutment with a parking cam 61. The oil caught by the first guide rib 74 is supplied through the support portion 73 and the notch 71c of the sleeve 71 to the sliding surface of the parking cam 61, viz., the sliding surface between the parking pawl 62 and the parking cam 61 and the sliding surface between the parking cam 61 and the sleeve 71.Type: ApplicationFiled: May 10, 2010Publication date: May 30, 2013Inventors: Hiromichi Kimura, Michitaka Tsuchida, Takeshi Kitahata, Tatsuo Obata, Yosuke Suzuki, Takeshi Kuwahara
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Publication number: 20130131941Abstract: It is provided a control device of a vehicle power transmission device including: a torque limiter device blocking transmission of a torque amount exceeding a predetermined torque with operation involving differential rotation between a first rotating member and a second rotating member; and an electric motor coupled to one of the first rotating member and the second rotating member in a power transmittable manner, wherein when a rotation speed difference is generated between the first rotating member and the second rotating member due to the operation of the torque limiter device, the electric motor is operated so as to suppress the rotation speed difference.Type: ApplicationFiled: May 21, 2010Publication date: May 23, 2013Inventors: Takeshi Kitahata, Tatsuo Obata, Hiromichi Kimura, Takeshi Kuwahara, Toru Saito, Masahiro Tanae
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Patent number: 8421318Abstract: A rotating electrical machine is provided in which, even when torque from a water turbine is reduced and reverse torque is applied due to load cut off, a rotor core is not eccentric to spider arms. The rotor of a rotating machine includes a vertical rotating shaft, spider arms extending radially from the vertical rotating shaft, and a rotor core component provided to the outer circumference of the spider arms. A T key and cotters are inserted into and secured to a key way provided to an abutment surface of the inner circumference of the rotor core component and the top end of the spider arm. A plate spring is mounted to a surface of the spider arm, the surface facing a rotational direction for electrical generation. The plate spring has one side engaging the spider arm, the other side engaging the rotor core component, and a middle portion bolted from an opposite surface of the spider arm.Type: GrantFiled: May 5, 2011Date of Patent: April 16, 2013Assignee: Hitachi Mitsubishi Hydro CorporationInventors: Takeshi Kuwahara, Yukiyoshi Yanagisawa, Koshu Hagiya, Masayuki Okada, Yosuke Omori, Shigeki Akanuma
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Publication number: 20120143422Abstract: A hybrid drive apparatus includes: a drive power source that includes an internal combustion engine, a first electric motor, and a second electric motor; a power transmission mechanism that includes a carrier, a sun gear, and a ring gear, and that is configured to rotate the output shaft of the internal combustion engine by the first electric motor; and plural bearings that each includes an outer ring member and an inner ring member fitted to the outer ring member through a rolling element, and that are provided apart from each other in an axial direction of the output shaft with the carrier being positioned between the bearings. An inner periphery of the outer ring member is positioned more inward in a radial direction of the ring gear relative to a meshing portion between inner teeth of the ring gear and outer teeth of one of the pinion gears.Type: ApplicationFiled: November 29, 2011Publication date: June 7, 2012Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi KITAHATA, Tatsuo OBATA, Takeshi KUWAHARA, Hiromichi KIMURA, Toru SAITO, Masahiro TANAE
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Patent number: 8183735Abstract: The present invention provides a rotating electrical machine including a rotor core that does not produce narrow areas in rotor slots even if circumferential ends of fan-shaped segment cores are displaced radially outwardly and circumferentially during operation. In the present invention, slots near circumferential ends of the fan-shaped segment cores are made larger than slots in circumferential intermediate portions of the segment cores. With such a configuration, even if the circumferential ends of the segment cores are displaced radially outwardly and circumferentially during operation, the circumferential ends of the segment cores forming the large slots do not protrude into the slots formed in the circumferential intermediate portions of axially adjacent segment cores, thereby preventing narrow areas from being produced in the rotor slots.Type: GrantFiled: May 6, 2009Date of Patent: May 22, 2012Assignee: Hitachi, Ltd.Inventors: Yukiyoshi Yanagisawa, Takeshi Kuwahara
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Patent number: 8147750Abstract: There is provided a gold alloy wire for a ball bonding. The gold alloy consists of 10 to 50 ppm by mass of magnesium (Mg); 5 to 20 ppm by mass of europium (Eu); 2 to 9 ppm by mass of calcium (Ca); and a remaining portion being gold (Au) having a purity of a minimum of 99.998% by mass. In the gold alloy wire for a ball bonding, an addition amount of calcium (Ca) is a maximum of half that of europium (Eu).Type: GrantFiled: June 23, 2008Date of Patent: April 3, 2012Assignee: Tanaka Denshi Kogyo KKInventors: Mitsuo Takada, Satoshi Teshima, Takeshi Kuwahara
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Publication number: 20120005271Abstract: A method and apparatus for selecting a client computer as a relay server to rebroadcast common application information that is broadcast from a server system over a network. The client computer is selected randomly to rebroadcast the User Datagram Protocol (UDP) information received from the server system and client computers receiving the UDP information from another client computer relay server on the network do not rebroadcast the information. If the client computer selected to rebroadcast the common information fails to rebroadcast, another client computer is randomly selected as a relay server and takes over rebroadcasting the common information.Type: ApplicationFiled: September 14, 2011Publication date: January 5, 2012Applicant: International Business Machines CorporationInventors: Kenji Kobayashi, Takeshi Kuwahara