Patents by Inventor Takayuki Norimatsu
Takayuki Norimatsu 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: 10794483Abstract: A spool valve includes a spool in a spool insertion hole defined in a valve body. The spool is configured to be moved by an electric motor via a ball-screw to a first position where an input port is in communication with an output port, while the output port is not in communication with a drain port, and to a second position where the input port is not in communication with the output port, while the output port is in communication with the drain port.Type: GrantFiled: July 17, 2015Date of Patent: October 6, 2020Assignee: NTN CORPORATIONInventors: Kyohei Sasanuma, Takayuki Norimatsu, Naoshi Hattori, Takahide Saito, Hiroshi Kawamura
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Patent number: 10150335Abstract: An assembling method includes fitting an entire range of the guide portion to the stem section with a gap therebetween, and inserting a bolt from an outboard side through a bolt insertion hole formed in the hub wheel. In this state, a maximum inclination angle of the bolt with respect to the hub wheel is set to be larger than a maximum inclination angle of the outer joint member with respect to the hub wheel. The method also includes connecting the bearing and the constant velocity universal joint to each other by threadedly engaging and fastening the bolt into a bolt hole formed in the stem section.Type: GrantFiled: June 16, 2014Date of Patent: December 11, 2018Assignee: NTN CORPORATIONInventors: Tsutomu Nagata, Takayuki Norimatsu
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Patent number: 10086649Abstract: A bearing device for a wheel has a wheel bearing including inner and outer rings, a hub wheel, and balls between outer raceway surfaces of the outer ring and inner raceway surfaces of the hub wheel and the inner ring. A stem section is fitted into an inner diameter of the hub wheel to couple a constant velocity universal joint to the wheel bearing through a screw fastening structure so that a shoulder portion of an outer joint member abuts against a crimped portion of the hub wheel. Projecting portions formed on the stem section are press-fitted into the hub wheel having depressed portions formed to interfere with the projecting portions, and a shape of the projecting portions is transferred to the hub wheel providing a projection and depression fitting structure in which the projecting and depressed portions are in close contact at an entire fitting contact portion therebetween.Type: GrantFiled: February 14, 2014Date of Patent: October 2, 2018Assignee: NTN CORPORATIONInventors: Takayuki Norimatsu, Tsutomu Nagata
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Patent number: 10066665Abstract: Provided is a sensor-equipped wheel support bearing assembly for rotatably supporting a wheel, including a sensor unit associated with one of outer and inner members that serve as a stationary member. The sensor unit includes a strain generator member that has at least three fixation contact segments fixedly in contact with the stationary member and at least two strain sensors mounted on the strain generator member. A first load estimator is provided to estimate load acting on the bearing assembly, using an average value of output signals of the sensors. A second load estimator is provided to estimate load acting on the bearing assembly, using the average value and an amplitude value of output signals of the sensors. An estimated load provider is provided to sum these outputs from the load estimators in a ratio that depends on wheel rotation speed, for outputting an estimated load.Type: GrantFiled: November 9, 2011Date of Patent: September 4, 2018Assignee: NTN CORPORATIONInventors: Toru Takahashi, Ayumi Akiyama, Takayuki Norimatsu, Kentarou Nishikawa
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Patent number: 9829048Abstract: A bearing device includes a bearing having an outer race with double-row outer raceway surfaces formed on its inner periphery, a hub wheel and an inner race having double-row inner raceway surfaces formed on outer peripheries thereof opposed to the outer raceway surfaces, and double-row rolling elements interposed between the outer and inner raceway surfaces. The bearing has a constant velocity universal joint separably coupled thereto with a screw fastening structure, in which a stem section of an outer joint member of the constant velocity universal joint is fitted to an inner diameter portion of the hub wheel, and in which a plurality of convex portions extending in an axial direction are formed on the stem section, and a plurality of concave portions having an interference with respect to only circumferential side wall portions of each of the plurality of convex portions are formed on the hub wheel.Type: GrantFiled: April 24, 2013Date of Patent: November 28, 2017Assignee: NTN CORPORATIONInventors: Shuji Mochinaga, Takayuki Norimatsu
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Patent number: 9797453Abstract: A wheel bearing apparatus has an outer member, an inner member, at least one inner ring fit onto the inner member. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces, via cages. A seal is mounted on one end of the outer member. The seal has side lips adapted to be in sliding contact with the wheel hub. The seal has three inclined side lips each extending radially outward from the seal body. The lips are adapted to be in sliding contact with the base of the wheel mounting flange. Interference of the side lips against the base of the wheel mounting flange is set so that the radially inner side lip has a smaller interference than that of the radially outer side lips, in order.Type: GrantFiled: October 3, 2006Date of Patent: October 24, 2017Assignee: NTN CorporationInventors: Takayuki Norimatsu, Hiroaki Itakura, Hironori Imanaka, Syougo Suzuki, Isao Hirai, Hiroya Kato, Akira Fujimura, Kikuo Fukada
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Publication number: 20170211699Abstract: A spool valve is provided which improves the responsiveness of the object to be hydraulically controlled, such as a V-belt type continuously variable transmission, and which improves the overall safety. The spool valve includes a spool inserted in a spool insertion hole formed in a valve body, The spool is moved by an electric motor via a ball-screw to a first position where the input port communicates with the output port, while the output port is not in communication with the drain port, and to a second position where the input port is not in communication with the output port, while the output port communicates with the drain port.Type: ApplicationFiled: July 17, 2015Publication date: July 27, 2017Applicant: NTN CORPORATIONInventors: Kyohei SASANUMA, Takayuki NORIMATSU, Naoshi HATTORI, Takahide SAITO, Hiroshi KAWAMURA
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Patent number: 9656517Abstract: A wheel bearing includes a constant velocity universal joint and a wheel bearing. The wheel bearing is separably coupled to the constant velocity universal joint with a screw fastening structure, in which a stem section of an outer joint member of the constant velocity universal joint is fitted to an inner diameter portion of the hub wheel. Projecting portions extending in an axial direction are formed on the stem section of the outer joint member, and depressed portions having an interference with respect to the projecting portions are formed on the hub wheel. The stem section of the outer joint member is press-fitted to the hub wheel, and a shape of the projecting portions is transferred to the other, to thereby provide a projection and depression fitting structure in which the projecting portions and the depressed portions are in close contact at an entire fitting contact portion therebetween.Type: GrantFiled: September 12, 2012Date of Patent: May 23, 2017Assignee: NTN CorporationInventors: Shuji Mochinaga, Takayuki Norimatsu
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Patent number: 9636945Abstract: A bearing device for a wheel includes a bearing. The bearing includes outer and inner members and double-row rolling elements. The bearing has a constant velocity universal joint coupled thereto in a torque transmittable manner by fitting a stem section of an outer joint member to a shaft hole of a hub wheel, in which the stem section of the outer joint member is press-fitted to the shaft hole of the hub wheel, and shapes of only the circumferential side wall portions of each of a plurality of convex portions are transferred to the shaft hole, to thereby define a convex and concave fitting portion in which close contact is achieved at an entire contact portion between the plurality of convex portions and the plurality of concave portions.Type: GrantFiled: July 2, 2014Date of Patent: May 2, 2017Assignee: NTN CORPORATIONInventors: Shuji Mochinaga, Takayuki Norimatsu
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Patent number: 9534635Abstract: A wheel bearing apparatus has an outer member, an inner member, at least one inner ring fit onto the inner member. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces, via cages. A seal is mounted on one end of the outer member. The seal has side lips adapted to be in sliding contact with the wheel hub. The seal has three inclined side lips each extending radially outward from the seal body. The lips are adapted to be in sliding contact with the base of the wheel mounting flange. Interference of the side lips against the base of the wheel mounting flange is set so that the radially inner side lip has a smaller interference than that of the radially outer side lips, in order.Type: GrantFiled: August 22, 2011Date of Patent: January 3, 2017Assignee: NTN CorporationInventors: Takayuki Norimatsu, Hiroaki Itakura, Hironori Imanaka, Syougo Suzuki, Isao Hirai, Hiroya Kato, Akira Fujimura, Kikuo Fukada
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Patent number: 9518609Abstract: A sensor equipped wheel support bearing assembly, in which a continuous estimated load can be obtained depending on various inputted load conditions is provided. The sensor equipped wheel support bearing assembly includes a sensor unit provided in a stationary member, and a load estimating unit. The load estimating unit includes a load estimation calculating section for calculating the load using an estimation calculating equation, an evaluation value calculation section for calculating an evaluation value, which provides a parameter switching index in the estimation calculating equation, from sensor output signals, and a parameter switching section for switching the parameter based on a comparison result of the evaluation value with a threshold value. The load estimation calculating section includes a calculation correcting block for correcting the calculation result on both sides of the threshold value within a predetermined evaluation value region containing the threshold value.Type: GrantFiled: September 2, 2011Date of Patent: December 13, 2016Assignee: NTN CORPORATIONInventors: Ayumi Akiyama, Toru Takahashi, Kentarou Nishikawa, Takayuki Norimatsu
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Patent number: 9393836Abstract: A bearing device for a wheel has a bearing including an outer race having double-row outer raceway surfaces formed on an inner circumference thereof, a hub wheel and an inner race having double-row inner raceway surfaces formed on an outer circumference thereof so as to be opposed to the outer raceway surfaces, and double-row rolling elements interposed between the inner and outer raceway surfaces. The bearing has a constant velocity universal joint coupled thereto with a screw fastening structure by fitting a stem section of an outer joint member to a shaft hole of the hub wheel, in which the shaft hole of the hub wheel is formed by penetrating the hub wheel into a cylindrical shape over an axial direction of the hub wheel.Type: GrantFiled: September 30, 2013Date of Patent: July 19, 2016Assignee: NTN CORPORATIONInventors: Shuji Mochinaga, Takayuki Norimatsu
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Publication number: 20160159145Abstract: An assembling method includes fitting an entire range of the guide portion to the stem section with a gap therebetween, and inserting a bolt from an outboard side through a bolt insertion hole formed in the hub wheel. In this state, a maximum inclination angle of the bolt with respect to the hub wheel is set to be larger than a maximum inclination angle of the outer joint member with respect to the hub wheel. The method also includes connecting the bearing and the constant velocity universal joint to each other by threadedly engaging and fastening the bolt into a bolt hole formed in the stem section.Type: ApplicationFiled: June 16, 2014Publication date: June 9, 2016Inventors: Tsutomu NAGATA, Takayuki NORIMATSU
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Publication number: 20160159144Abstract: A bearing device for a wheel includes a bearing. The bearing includes outer and inner members and double-row rolling elements. The bearing has a constant velocity universal joint coupled thereto in a torque transmittable manner by fitting a stem section of an outer joint member to a shaft hole of a hub wheel, in which the stem section of the outer joint member is press-fitted to the shaft hole of the hub wheel, and shapes of only the circumferential side wall portions of each of a plurality of convex portions are transferred to the shaft hole, to thereby define a convex and concave fitting portion in which close contact is achieved at an entire contact portion between the plurality of convex portions and the plurality of concave portions.Type: ApplicationFiled: July 2, 2014Publication date: June 9, 2016Applicant: NTN CORPORATIONInventors: Shuji MOCHINAGA, Takayuki NORIMATSU
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Publication number: 20160016431Abstract: A bearing device for a wheel has a wheel bearing including inner and outer rings, a hub wheel, and balls between outer raceway surfaces of the outer ring and inner raceway surfaces of the hub wheel and the inner ring. A stem section is fitted into an inner diameter of the hub wheel to couple a constant velocity universal joint to the wheel bearing through a screw fastening structure so that a shoulder portion of an outer joint member abuts against a crimped portion of the hub wheel. Projecting portions formed on the stem section are press-fitted into the hub wheel having depressed portions formed to interfere with the projecting portions, and a shape of the projecting portions is transferred to the hub wheel providing a projection and depression fitting structure in which the projecting and depressed portions are in close contact at an entire fitting contact portion therebetween.Type: ApplicationFiled: February 14, 2014Publication date: January 21, 2016Applicant: NTN CORPORATIONInventors: Takayuki NORIMATSU, Tsutomu NAGATA
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Patent number: 9234908Abstract: A rotation detecting device, which is compatible regardless of whether a process control device for processing an output signal of the rotation detecting device is standard one or new one having high input signal resolving power, and, also, a rotation detecting device equipped bearing assembly having such rotation detecting device, are provided. The rotation detecting device includes an encoder provided rotatably and having a plurality of circumferentially equidistantly arranged to-be-detected poles, and a sensor for detecting the to-be-detected poles. The use is made of a multiplying unit for multiplying the phase of the to-be-detected poles from an output of the sensor. The use is also made of a pulse outputting unit for receiving an output of the multiplying unit or both the output of the multiplying unit and an output of the sensor and output pulses having two multiplying powers different from each other.Type: GrantFiled: June 10, 2010Date of Patent: January 12, 2016Assignee: NTN CORPORATIONInventors: Kiyotake Shibata, Toru Takahashi, Takayuki Norimatsu
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Publication number: 20150321511Abstract: A bearing device includes a bearing having an outer race with double-row outer raceway surfaces formed on its inner periphery, a hub wheel and an inner race having double-row inner raceway surfaces formed on outer peripheries thereof opposed to the outer raceway surfaces, and double-row rolling elements interposed between the outer and inner raceway surfaces. The bearing has a constant velocity universal joint separably coupled thereto with a screw fastening structure, in which a stem section of an outer joint member of the constant velocity universal joint is fitted to an inner diameter portion of the hub wheel, and in which a plurality of convex portions extending in an axial direction are formed on the stem section, and a plurality of concave portions having an interference with respect to only circumferential side wall portions of each of the plurality of convex portions are formed on the hub wheel.Type: ApplicationFiled: April 24, 2013Publication date: November 12, 2015Inventors: Shuji MOCHINAGA, Takayuki NORIMATSU
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Publication number: 20150273939Abstract: A bearing device for a wheel has a bearing including an outer race having double-row outer raceway surfaces formed on an inner circumference thereof, a hub wheel and an inner race having double-row inner raceway surfaces formed on an outer circumference thereof so as to be opposed to the outer raceway surfaces, and double-row rolling elements interposed between the inner and outer raceway surfaces. The bearing has a constant velocity universal joint coupled thereto with a screw fastening structure by fitting a stem section of an outer joint member to a shaft hole of the hub wheel, in which the shaft hole of the hub wheel is formed by penetrating the hub wheel into a cylindrical shape over an axial direction of the hub wheel.Type: ApplicationFiled: September 30, 2013Publication date: October 1, 2015Applicant: NTN CORPORATIONInventors: Shuji MOCHINAGA, Takayuki NORIMATSU
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Patent number: 9056523Abstract: A wheel bearing apparatus has a cup-shaped cap that is coated by a preserving film and mounted on an outer member. The cap is press-formed from non-magnetic steel sheet. The cap has a cylindrical fitting portion, a disk portion and a bottom portion. The cylindrical fitting portion is press-fit into the inner circumference of the inner-side end of the outer member. The disk portion extends radially inward from the fitting portion and opposes a pulser ring, via a small axial gap. The bottom portion extends from the disk portion, via a bent portion, to cover the inner-side end of the inner member. The rotational speed sensor is arranged opposite the pulser ring, via the disk portion of the cap, where the rotational speed sensor is closely arranged to the pulser ring.Type: GrantFiled: May 15, 2013Date of Patent: June 16, 2015Assignee: NTN CorporationInventor: Takayuki Norimatsu
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Patent number: D761162Type: GrantFiled: November 10, 2014Date of Patent: July 12, 2016Assignee: NTN CORPORATIONInventors: Shuji Mochinaga, Takayuki Norimatsu