Patents by Inventor Takanobu Koyama
Takanobu Koyama 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: 10876584Abstract: A wheel module according to an embodiment includes a wheel, a motor, a shaft, a holding member and a brake. A tire is mounted on the wheel. The motor is arranged on the inner side of the wheel and includes a stator and a rotor. The shaft is fixed to the rotor coaxially with a rotation axis of the rotor and transmits rotation force of the rotor to the wheel. The holding member holds the stator. The brake restricts rotation of the shaft. One end portion of the holding member in the axial direction of the rotation axis of the rotor is fixed to and supported by a support member. The brake is on the opposite side to the wheel with the support member interposed therebetween. The shaft extends to an inner portion of the brake while passing through through-holes formed in the one end portion and the supporting member.Type: GrantFiled: October 5, 2018Date of Patent: December 29, 2020Assignee: MINEBEA MITSUMI INC.Inventors: Shen Zhao, Hiroyuki Furusaki, Takanobu Koyama
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Publication number: 20190040921Abstract: A wheel module according to an embodiment includes a wheel, a motor, a shaft, a holding member and a brake. A tire is mounted on the wheel. The motor is arranged on the inner side of the wheel and includes a stator and a rotor. The shaft is fixed to the rotor coaxially with a rotation axis of the rotor and transmits rotation force of the rotor to the wheel. The holding member holds the stator. The brake restricts rotation of the shaft. One end portion of the holding member in the axial direction of the rotation axis of the rotor is fixed to and supported by a support member. The brake is on the opposite side to the wheel with the support member interposed therebetween. The shaft extends to an inner portion of the brake while passing through through-holes formed in the one end portion and the supporting member.Type: ApplicationFiled: October 5, 2018Publication date: February 7, 2019Inventors: Shen ZHAO, Hiroyuki FURUSAKI, Takanobu KOYAMA
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Patent number: 8267236Abstract: An electromagnetic clutch comprises a rotor rotatable with respect to the center of rotation, an armature facing the rotor with a clearance, a device for generating a magnetic attracting force between the rotor and the armature, a rotating member transmitting a driving force from the armature, and a plate spring for mounting the armature on the rotating member. The plate spring extends in a direction opposite to the center of rotation and has a first end separated from the center of rotation. The first end or a portion in the vicinity of the first end contacts an armature surface facing the rotor, and the plate spring is fixed to the rotating member at a portion other than the portion contacting the armature surface. The armature is supported such that the armature is urged to be separated in a direction opposite to the rotor by an elasticity of the plate spring.Type: GrantFiled: July 9, 2008Date of Patent: September 18, 2012Assignee: Minebea Co., Ltd.Inventors: Shinichi Yoshida, Takanobu Koyama, Yoshikazu Saka
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Publication number: 20090032357Abstract: An electromagnetic clutch comprises a rotor rotatable with respect to the center of rotation, an armature facing the rotor with a clearance, a device for generating a magnetic attracting force between the rotor and the armature, a rotating member transmitting a driving force from the armature, and a plate spring for mounting the armature on the rotating member. The plate spring extends in a direction opposite to the center of rotation and has a first end separated from the center of rotation. The first end or a portion in the vicinity of the first end contacts an armature surface facing the rotor, and the plate spring is fixed to the rotating member at a portion other than the portion contacting the armature surface. The armature is supported such that the armature is urged to be separated in a direction opposite to the rotor by an elasticity of the plate spring.Type: ApplicationFiled: July 9, 2008Publication date: February 5, 2009Inventors: Shinichi Yoshida, Takanobu Koyama, Yoshikazu Saka
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Publication number: 20080142332Abstract: An inexpensive electromagnetic clutch device with high precision, which can be manufactured by a simple method, is provided, which clutch device includes: a base member for supporting an entire clutch; a shaft securely fixed to the base member; a rotor arranged onto the shaft, rotatably relative to the base member around the shaft; an electromagnetic coil for causing an electromagnetic force on the rotor when energized; an armature attracted to the rotor and frictionally coupled with the rotor when electromagnetic coil is energized and a torque transmission member coupled to the armature and a member to be driven.Type: ApplicationFiled: December 10, 2007Publication date: June 19, 2008Inventors: Takanobu Koyama, Daisuke Hashimoto
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Patent number: 7030532Abstract: A variable reluctance resolver has a rotor which includes a noncircular core and which is rotatably supported inside a stator with a gap therebetween. The shape of the rotor is such that the gap permeance, which is based on the gap, varies according to a sine function of the rotational angle. Each of the salient poles of the rotor has an outer periphery comprising an arc of radius r centered on a point which is offset from the center of the rotor by a prescribed offset distance. The outer periphery of each salient pole does not extend to the inner periphery of the stator.Type: GrantFiled: April 12, 2004Date of Patent: April 18, 2006Assignee: Minebea Co., Ltd.Inventors: Masahiro Kobayashi, Hiroyuki Kujirai, Takanobu Koyama, Nao Aoki
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Publication number: 20060043815Abstract: A VR resolver includes a stator yoke having a plurality of magnetic-pole portions; a rotor having a salient-pole portion; an excitation coil; and a plurality of output coils. The stator yoke and the rotor form an annular, hollow structure having a rectangular radial cross section. The excitation coil is provided in the hollow portion of the annular, hollow structure. The output coils are provided at the corresponding magnetic-pole portions of the stator yoke.Type: ApplicationFiled: March 21, 2005Publication date: March 2, 2006Inventors: Taiichi Miya, Takanobu Koyama
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Publication number: 20050023921Abstract: A variable reluctance resolver has a rotor which includes a noncircular core and which is rotatably supported inside a stator with a gap therebetween. The shape of the rotor is such that the gap permeance, which is based on the gap, varies according to a sine function of the rotational angle. Each of the salient poles of the rotor has an outer periphery comprising an arc of radius r centered on a point which is offset from the center of the rotor by a prescribed offset distance. The outer periphery of each salient pole does not extend to the inner periphery of the stator.Type: ApplicationFiled: April 12, 2004Publication date: February 3, 2005Inventors: Masahiro Kobayashi, Hiroyuki Kujirai, Takanobu Koyama, Nao Aoki
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Patent number: 6815853Abstract: A stator core 1 is surrounded by a first insulating member 40 and a second insulating member 41. Locking protrusions 9 are formed on the outer periphery of the stator core 1, and the locking protrusions 9 form a keyway 11. A modular connector 2 includes a key part 21 that fits within the keyway 11 to secure the modular connector 2 to the stator core 1. Fastening pins 18 are embedded in the modular connector 2 to conduct electricity from a mating connector 91 and a lead line 93 to the resolver.Type: GrantFiled: November 19, 2003Date of Patent: November 9, 2004Assignee: Minebea Co., Ltd.Inventors: Takanobu Koyama, Naofumi Kumagai
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Publication number: 20040150275Abstract: A stator core 1 is surrounded by a first insulating member 40 and a second insulating member 41. Locking protrusions 9 are formed on the outer periphery of the stator core 1, and the locking protrusions 9 form a keyway 11. A modular connector 2 includes a key part 21 that fits within the keyway 11 to secure the modular connector 2 to the stator core 1. Fastening pins 18 are embedded in the modular connector 2 to conduct electricity from a mating connector 91 and a lead line 93 to the resolver.Type: ApplicationFiled: November 19, 2003Publication date: August 5, 2004Inventors: Takanobu Koyama, Naofumi Kumagai