Patents by Inventor Kunihiro Oka
Kunihiro Oka 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: 11377134Abstract: A steering device includes: a first moving unit that moves in an axial direction along with a shaft member to which an operating member is connected; a second moving unit; a holding unit; a first screw mechanism; a second screw mechanism; a driving unit; and a transmission mechanism that transmits driving force of the driving unit to the first screw mechanism and the second screw mechanism. One of the first screw mechanism and the second screw mechanism is provided so as to operate in a forward direction when the operating member moves between a retraction region and an operation region, and reverse efficiency of that one screw mechanism is set such that when the operating member is subjected to an external force directed toward the retraction region, that one screw mechanism does not operate in a reverse direction.Type: GrantFiled: April 13, 2021Date of Patent: July 5, 2022Assignee: JTEKT CORPORATIONInventors: Takeshi Watanabe, Kunihiro Oka, Yasuyuki Nozawa, Kei Kitahara
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Publication number: 20210323598Abstract: A steering device includes: a first moving unit that moves in an axial direction along with a shaft member to which an operating member is connected; a second moving unit; a holding unit; a first screw mechanism; a second screw mechanism; a driving unit; and a transmission mechanism that transmits driving force of the driving unit to the first screw mechanism and the second screw mechanism. One of the first screw mechanism and the second screw mechanism is provided so as to operate in a forward direction when the operating member moves between a retraction region and an operation region, and reverse efficiency of that one screw mechanism is set such that when the operating member is subjected to an external force directed toward the retraction region, that one screw mechanism does not operate in a reverse direction.Type: ApplicationFiled: April 13, 2021Publication date: October 21, 2021Applicant: JTEKT CORPORATIONInventors: Takeshi WATANABE, Kunihiro OKA, Yasuyuki NOZAWA, Kei KITAHARA
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Patent number: 8689926Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).Type: GrantFiled: February 6, 2009Date of Patent: April 8, 2014Assignee: JTEKT CorporationInventors: Shigeki Nagase, Shiro Nakano, Ken Matsubara, Motoo Nakai, Kunihiro Oka, Naotake Kanda, Nobuhiro Uchida, Kouya Yoshida, Minoru Sentoku
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Patent number: 8408353Abstract: Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317).Type: GrantFiled: February 9, 2009Date of Patent: April 2, 2013Assignee: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Minoru Sentoku, Kunihiro Oka, Motoo Nakai, Kouya Yoshida, Nobuhiro Uchida, Naotake Kanda
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Patent number: 8245813Abstract: There is provided a steering apparatus including a pinion communicating with an operation of a steering member, a rack shaft having a rack meshed with the pinion, and a support yoke resiliently coming into contact with the rack shaft, and being configured to convert rotation of the pinion into movement of the rack shaft in an axial direction in a meshing portion in which the pinion and rack mesh to each other. The steering apparatus comprises a detection unit for detecting a force applied to the support yoke to which a force acting on the meshing portion being transmitted from the rack shaft and a calculation unit for calculating a steering torque applied to the steering member based on the force detected by the detection unit, wherein the pinion and the rack are formed in helical gears.Type: GrantFiled: October 20, 2010Date of Patent: August 21, 2012Assignee: JTEKT CorporationInventors: Takahiro Mizuno, Shiro Nakano, Kunihiro Oka
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Publication number: 20110040448Abstract: There is provided a steering apparatus including a pinion communicating with an operation of a steering member, a rack shaft having a rack meshed with the pinion, and a support yoke resiliently coming into contact with the rack shaft, and being configured to convert rotation of the pinion into movement of the rack shaft in an axial direction in a meshing portion in which the pinion and rack mesh to each other. The steering apparatus comprises a detection unit for detecting a force applied to the support yoke to which a force acting on the meshing portion being transmitted from the rack shaft and a calculation unit for calculating a steering torque applied to the steering member based on the force detected by the detection unit, wherein the pinion and the rack are formed in helical gears.Type: ApplicationFiled: October 20, 2010Publication date: February 17, 2011Applicant: JTEKT CORPORATIONInventors: Takahiro Mizuno, Shiro Nakano, Kunihiro Oka
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Publication number: 20110000737Abstract: Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317).Type: ApplicationFiled: February 9, 2009Publication date: January 6, 2011Applicant: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Minoru Sentoku, Kunihiro Oka, Motoo Nakai, Kouya Yoshida, Nobuhiro Uchida, Naotake Kanda
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Publication number: 20100314192Abstract: An electric power steering apparatus (1) comprises a control device (12), which controls driving of an electric motor (18) based on the detection signals from a rotational position-detecting sensor (72; 72A), which detects the rotational position of the rotor (64) of the electric motor (18), and a steering status detecting sensor (11; 11A). The control device (12) is housed in a housing (100) that is partitioned by a first housing (23), which is at least a portion of the motor housing (25) for the electric motor (18), and a second housing (24; 24A; 24B) that touches the first housing (23). At least one of the rotational position-detecting sensor (72; 72A) and steering state detecting sensor (11; 11A) is connected to the control device (12) by means of only a signal wire (81; 134) inside the first housing (23) or the second housing (24; 24A; 24B).Type: ApplicationFiled: February 6, 2009Publication date: December 16, 2010Applicant: JTEKT CorporationInventors: Shigeki Nagase, Shiro Nakano, Ken Matsubara, Motoo Nakai, Kunihiro Oka, Naotake Kanda, Nobuhiro Uchida, Kouya Yoshida, Minoru Sentoku
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Patent number: 7841443Abstract: There is provided a steering apparatus including a pinion communicating with an operation of a steering member, a rack shaft having a rack meshed with the pinion, and a support yoke resiliently coming into contact with the rack shaft, and being configured to convert rotation of the pinion into movement of the rack shaft in an axial direction in a meshing portion in which the pinion and rack mesh to each other. The steering apparatus comprises a detection unit for detecting a force applied to the support yoke to which a force acting on the meshing portion being transmitted from the rack shaft and a calculation unit for calculating a steering torque applied to the steering member based on the force detected by the detection unit, wherein the pinion and the rack are formed in helical gears.Type: GrantFiled: August 13, 2007Date of Patent: November 30, 2010Assignee: Jtekt CorporationInventors: Takahiro Mizuno, Shiro Nakano, Kunihiro Oka
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Patent number: 7413052Abstract: An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.Type: GrantFiled: March 15, 2007Date of Patent: August 19, 2008Assignees: Jtekt Corporation, Gates Unitta Asia CompanyInventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka, Hiroshi Murataka, Akihiro Hironaka
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Publication number: 20080042389Abstract: There is provided a steering apparatus including a pinion communicating with an operation of a steering member, a rack shaft having a rack meshed with the pinion, and a support yoke resiliently coming into contact with the rack shaft, and being configured to convert rotation of the pinion into movement of the rack shaft in an axial direction in a meshing portion in which the pinion and rack mesh to each other. The steering apparatus comprises a detection unit for detecting a force applied to the support yoke to which a force acting on the meshing portion being transmitted from the rack shaft and a calculation unit for calculating a steering torque applied to the steering member based on the force detected by the detection unit, wherein the pinion and the rack are formed in helical gears.Type: ApplicationFiled: August 13, 2007Publication date: February 21, 2008Applicant: JTEKT CORPORATIONInventors: Takahiro Mizuno, Shiro Nakano, Kunihiro Oka
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Publication number: 20070187169Abstract: An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.Type: ApplicationFiled: March 15, 2007Publication date: August 16, 2007Inventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka, Hiroshi Murataka, Akihiro Hironaka
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Patent number: 7191866Abstract: An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other and a belt tension adjuster.Type: GrantFiled: April 26, 2005Date of Patent: March 20, 2007Assignees: Koyo Seiko Co., Ltd., Gates Unitta Asia CompanyInventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka, Hiroshi Murataka, Akihiro Hironaka
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Publication number: 20050197224Abstract: An electric power steering apparatus comprises a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism comprises an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and means for adjusting the tension of the belt.Type: ApplicationFiled: April 26, 2005Publication date: September 8, 2005Inventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka
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Patent number: 6938722Abstract: An electric power steering apparatus includes a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism includes an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and a belt tension adjuster.Type: GrantFiled: January 28, 2003Date of Patent: September 6, 2005Assignees: Gates Unitta Asia Company, Koyo Seiko Co., Ltd.Inventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka, Hiroshi Murataka, Akihiro Hironaka
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Publication number: 20050189162Abstract: An electric power steering apparatus comprises a speed reducing mechanism for decelerating the rotation of a rotatable shaft in an electric motor and a converting mechanism for converting the output rotation of the speed reducing mechanism into the axial movement of a steering shaft extending toward the right and left sides of a vehicle. The speed reducing mechanism comprises an input pulley driven by the electric motor, an output pulley arranged with the steering shaft enclosed thereby, a belt for connecting the input pulley and the output pulley to each other, and means for adjusting the tension of the belt.Type: ApplicationFiled: April 26, 2005Publication date: September 1, 2005Inventors: Hiroto Sasaki, Takehiro Saruwatari, Kensaku Nakamura, Atsuya Miyata, Kazuaki Nagamatsu, Kunihiro Oka
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Patent number: 6918457Abstract: In an electric power steering system, a second bevel gear is allowed to move toward a first bevel gear and is biased by a biasing member toward the first bevel gear thereby to be moved toward the first bevel gear as following the wearing away of these bevel gears. In an electric power steering system, a support shaft formed with the first bevel gear at its distal end is rotatably supported by a retaining member, which is mounted to a support-shaft housing as allowed to move axially of the support shaft. The retaining member is adjusted for its position relative to the support-shaft housing with respect to the axial direction of the support shaft by means of a retaining member adjuster. The first bevel gear is moved toward the second bevel gear as following the wearing away of these bevel gears.Type: GrantFiled: June 27, 2003Date of Patent: July 19, 2005Assignee: Koyo Seiko Co., Ltd.Inventors: Takehiro Saruwatari, Kunihiro Oka, Masanori Arima
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Patent number: D589858Type: GrantFiled: August 6, 2008Date of Patent: April 7, 2009Assignee: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Nobuhiro Uchida, Naotake Kanda, Kunihiro Oka
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Patent number: D599263Type: GrantFiled: January 28, 2009Date of Patent: September 1, 2009Assignee: Jtekt CorporationInventors: Shigeki Nagase, Ken Matsubara, Nobuhiro Uchida, Naotake Kanda, Kunihiro Oka
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Patent number: D602411Type: GrantFiled: August 6, 2008Date of Patent: October 20, 2009Assignee: JTEKT CorporationInventors: Shigeki Nagase, Ken Matsubara, Nobuhiro Uchida, Naotake Kanda, Kunihiro Oka