Patents Assigned to NTN Corporation
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Patent number: 12202388Abstract: A clutch unit includes an operation lever, an operation bracket, an output shaft member, an input-side clutch, an output-side clutch, and a housing. An input-side outer ring member of the input-side clutch is a member including a bottom part and an outer ring part. A part of the outer ring part is a thick part. The thickness of the thick part in the radial direction is larger than the thickness of a non-thick part in the radial direction.Type: GrantFiled: May 6, 2021Date of Patent: January 21, 2025Assignee: NTN CORPORATIONInventors: Kunihiro Mikasa, Yu Kitada, Kyohei Sasanuma, Shaoluan Bian
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Patent number: 12203510Abstract: A plunging type constant velocity universal joint 1 for a propeller shaft includes an outer joint member 2, an inner joint member 3, eight torque transmidetting balls 4, and a cage 5. A center of curvature O1 of a spherical outer surface 12 and a center of curvature O2 of a spherical inner surface 13 of the cage 5 each have an equal and axially opposite offset (f) with respect to a center O3 of pockets 5a. A ratio f/PCDBALL between the offset (f) of the cage 5 and a pitch circle diameter (PCDBALL) of the torque transmitting balls 4 is 0.07 or more and 0.09 or less.Type: GrantFiled: October 24, 2023Date of Patent: January 21, 2025Assignee: NTN CORPORATIONInventors: Masazumi Kobayashi, Tomoshige Kobayashi
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Patent number: 12203062Abstract: The present invention is to provide a cell chip and a three-dimensional tissue chip and a production method therefor such that even when a highly viscous cell-containing solution is a material, the highly safe and reproducible cell chip or three-dimensional tissue chip with a desired application volume can be produced within a short time and in a large quantity so as to have a desired cell density and exhibit high cell viability.Type: GrantFiled: November 1, 2018Date of Patent: January 21, 2025Assignees: OSAKA UNIVERSITY, NTN CORPORATIONInventors: Mitsuru Akashi, Takami Akagi, Masaki Egami, Akihiro Yamanaka, Haruka Nakamura, Toukokuryuu Ai
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Patent number: 12196257Abstract: A bearing device includes: at least one bearing that has a rolling element and a raceway surface to support a main shaft; a member disposed on a path through which pressing force generating a preload between the rolling element and the raceway surface is transmitted; and at least one load sensor element fixed to the member to measure the pressing force. At least one load sensor element is a chip component including a thin film pattern of which resistance changes according to the pressing force and a protective layer that insulates and protects thin film pattern.Type: GrantFiled: December 8, 2020Date of Patent: January 14, 2025Assignee: NTN CORPORATIONInventors: Takashi Koike, Yasuyuki Fukushima, Yusuke Shibuya, Daichi Kondou
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Patent number: 12196255Abstract: A hub bearing 1 including an outer ring 2 that serves as a stationary side raceway ring, a hub wheel 3 and an inner ring 5 serving as a rotatable side raceway ring, balls 4 serving as a plurality of rolling elements disposed between a raceway surface of the stationary side raceway ring and a raceway surface of the rotatable side raceway ring, and grease that lubricates a rolling contact part between each of the raceway surfaces and the rolling elements. The surface roughness of at least one raceway surface selected from the raceway surface of the stationary side raceway ring and the raceway surface of the rotatable side raceway ring in the rolling contact part is 0.03 ?m Ra or less.Type: GrantFiled: November 2, 2020Date of Patent: January 14, 2025Assignee: NTN CORPORATIONInventors: Tomoya Sakaguchi, Naoto Shibuya, Makoto Seki
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Publication number: 20250010467Abstract: A control device controls an attitude control actuator by means of which a distal end member located on a link actuation device can be moved. A parallel linkage mechanism includes a proximal end-side link hub, a distal end-side link hub, and three linkages via which the distal end-side link hub is coupled to the proximal end-side link hub in such a manner that allows the attitude of the distal end-side link hub to change relative to the proximal end-side link hub. The control device includes a parameter switcher which switches control parameters to adjust the jerk of the attitude control actuator or the distal end member based on a load applied to the distal end member. The parameter switcher can switch more than one control parameter including at least one of the filter time constant of a moving average filter or a model following control gain.Type: ApplicationFiled: September 25, 2024Publication date: January 9, 2025Applicant: NTN CORPORATIONInventors: Yuki SHIMURA, Masaki KAGAMI, Kota FURUHASHI
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Patent number: 12188835Abstract: A load sensor element includes a substrate made of a ceramic material; an inorganic layer having a surface configured to receive a load, the inorganic layer covers a portion of the substrate; a thin-layer resistance body whose resistance value changes in accordance with the load received by the inorganic layer, the thin-layer resistance body having a main body portion and a pair of end portions, the main body portion mounted on the covered portion of the substrate and sandwiched between the substrate and the inorganic layer, the pair of end portions mounted on an exposed portion of the substrate, and the exposed portion free of the inorganic layer; and a pair of electrodes electrically connected to the pair of end portions of the thin-layer resistance body and separated away from the inorganic layer and on one side of the substrate.Type: GrantFiled: August 19, 2020Date of Patent: January 7, 2025Assignees: KOA Corporation, NTN CorporationInventors: Homare Kaneko, Natsumi Shiobara, Koichi Urano, Yusuke Shibuya, Daichi Kondou
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Patent number: 12180927Abstract: A linear-motion guiding device is disposed on the wall of the container. The wind turbine includes, at the lower end of the support column, a support-column lower end member capable of being fixed to the linear-motion guiding device. A slider of the linear-motion guiding device is provided with a guide member, and a bolt is inserted through a bolt insertion hole in the support-column lower end member and is screwed into a threaded hole in the guide member. The apparatus includes an attachment guide part including a stepped bolt and a flanged step part, the attachment guide part being configured to guide the support-column lower end member to a position and an attitude in which the bolt insertion hole in the support-column lower end member is aligned with the threaded hole in the guide member when the support-column lower end member is not fixed to the slider.Type: GrantFiled: March 14, 2023Date of Patent: December 31, 2024Assignee: NTN CORPORATIONInventor: Ryosuke Karasawa
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Patent number: 12169000Abstract: A mechanical component according to one aspect of the present invention is made of a titanium alloy and has a surface. The mechanical component includes a plurality of primary ? crystal grains and a plurality of secondary ? crystal grains. At the surface of the mechanical component the primary ? crystal grains have an area ratio of 10% or more and 30% or less. At the surface of the mechanical component the secondary ? crystal grains have a major diameter of 75 ?m or less and a minor diameter of 10 ?m or less. At the surface of the mechanical component 1% by mass or more of oxygen is included.Type: GrantFiled: December 14, 2018Date of Patent: December 17, 2024Assignee: NTN CORPORATIONInventors: Ayaka Yamahara, Miyu Sato, Chikara Ohki
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Patent number: 12163555Abstract: A bearing part according to one embodiment of the present invention is a bearing part composed of a chromium molybdenum steel, the bearing part including a diffusion layer in a surface of the bearing part. The diffusion layer includes a plurality of compound grains and a plurality of martensite blocks. An average grain size of the compound grains is less than or equal to 0.3 ?m. An area ratio of the compound grains in the diffusion layer is more than or equal to 3%. A maximum grain size of the plurality of martensite blocks is less than or equal to 3.8 ?m.Type: GrantFiled: December 5, 2018Date of Patent: December 10, 2024Assignee: NTN CORPORATIONInventors: Masahiro Yamada, Chikara Ohki
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Patent number: 12157194Abstract: A bearing apparatus includes a bearing that rotatably supports a main spindle around a rotation axis, a spacer including an inner-ring spacer adjacent to an inner ring of the bearing and an outer-ring spacer adjacent to an outer ring, and a heat flux sensor provided in an inside surface of the outer-ring spacer. A distance in a direction along the rotation axis from a center of the bearing to a center of the heat flux sensor is longer than 0.5 time and shorter than one time of a dimension of the bearing in the direction along the rotation axis.Type: GrantFiled: September 8, 2021Date of Patent: December 3, 2024Assignee: NTN CorporationInventor: Shohei Hashizume
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Patent number: 12158209Abstract: A shaft seal having a ring shape adheres to an outer peripheral surface of a rotational shaft and thereby seals sealed fluid. The shaft seal partitions a gap between the rotational shaft and a housing to which the shaft seal is mounted, into a high-pressure side and a low-pressure side. The shaft seal is an injection-molded body having a generally U-shape in a sectional view about an axial direction. The shaft seal has a seal lip part that is configured to extend to the high-pressure side and slide on the rotational shaft, and an outer lip part that is disposed at an outer diametrical side relative to the seal lip part. An inclined angle of the seal lip part 2 relative to the outer peripheral surface of the rotational shaft is 5-20 degrees.Type: GrantFiled: December 3, 2020Date of Patent: December 3, 2024Assignee: NTN CORPORATIONInventors: Ken Yasuda, Yoshihiro Takahashi
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Patent number: 12157224Abstract: A spherical surface link mechanism includes a proximal end link hub, a distal end link hub, a plurality of links, a plurality of intermediate link hubs, and a shaft member. Each of the plurality of links includes a first end link member, a second end link member, and an intermediate link member. The first end link member is coupled, at one end, to the proximal end link hub to be rotatable about a first rotation axis. The second end link member is coupled, at one end, to the distal end link hub to be rotatable about a second rotation axis. The intermediate link member is coupled, at one end, to the other end of the first end link member to be rotatable about a third rotation axis and is coupled to, at the other end, the other end of the second end link member to be rotatable about a fourth rotation axis.Type: GrantFiled: October 26, 2021Date of Patent: December 3, 2024Assignee: NTN CorporationInventor: Naohiko Satou
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Patent number: 12151658Abstract: A controller of an electric brake device includes first, second and third PKB operators. Upon receipt of an instruction to produce a parking brake active state while a parking brake is released, the first PKB operator exerts a braking force without depending on a brake pedal and determines if a desired braking force is exerted. After the determination by the first PKB operator, the second PKB operator makes a movable part ready to come into engagement with an engaged part and causes an electric motor to rotate in a direction in which the braking force is decreased, so that the movable part comes into engagement with the engaged part to prevent the rotation of the electric motor. Then, the third PKB operator produces the parking brake active state where no driving power is generated to the electric motor.Type: GrantFiled: December 17, 2021Date of Patent: November 26, 2024Assignee: NTN CORPORATIONInventor: Yui Masuda
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Patent number: 12146524Abstract: A ball bearing is provided which includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially convex circular arc shape in cross sections along a circumferential direction are formed on one of the cage-side sliding contact surface and the seal-side sliding contact surface at constant pitches in the circumferential direction.Type: GrantFiled: August 6, 2021Date of Patent: November 19, 2024Assignee: NTN CORPORATIONInventors: Katsuaki Sasaki, Susumu Miyairi
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Patent number: 12146208Abstract: Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.Type: GrantFiled: May 6, 2021Date of Patent: November 19, 2024Assignee: NTN CORPORATIONInventors: Toshihiko Mouri, Hiroharu Nagata
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Patent number: 12142969Abstract: A rotor unit 1 used in an electric motor, the rotor unit 1 including a rotor core 5, a rotary shaft 3 inserted in an inner periphery of the rotor core 5, a plurality of magnets 6 attached to an outer peripheral surface of the rotor core 5, and a cover member 4 covering an outer periphery of each of the plurality of the magnets 6, in which the rotary shaft 3 is provided, on an outer peripheral surface of the rotary shaft 3, with a caulking part 3c configured to restrict an axial movement of the rotor core 5 with respect to the rotary shaft 3, and the caulking part 3c is configured to restrict an axial movement of the cover member 4 with respect to the rotor core 5.Type: GrantFiled: June 4, 2019Date of Patent: November 12, 2024Assignee: NTN CORPORATIONInventor: Yuuki Naitou
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Patent number: 12129896Abstract: A power transmission mechanism (2) includes left and right drive shafts (3L, 3R) that transmit rotational torque from a drive source to drive wheels provided on left and right sides of a vehicle. In the right drive shaft (3R) and the left drive shaft (3L), the numbers of rolling elements (23, 33) included in plunging type constant velocity universal joints (6L, 6R) are different from each other.Type: GrantFiled: June 18, 2020Date of Patent: October 29, 2024Assignee: NTN CORPORATIONInventors: Takuya Katou, Kenji Terada, Yasunori Kawasaki
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Patent number: 12129891Abstract: Provided is a sintered bearing formed mainly of an iron structure (33) and a copper structure (31) which are formed of a partially diffusion-alloyed powder (11) of an iron powder (12) and a copper powder (13). The sintered bearing includes a copper structure (31d) formed of a granular elemental copper powder (13?) having a grain diameter of 45 ?m or less, the ratio of the copper structure (31d) being 10 mass % or less. With this, a further increase in strength of the sintered bearing can be realized.Type: GrantFiled: April 29, 2021Date of Patent: October 29, 2024Assignee: NTN CORPORATIONInventors: Tomonori Yamashita, Yoshinori Ito, Daisuke Takeda, Yuta Ohashi
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Publication number: 20240352976Abstract: A bearing includes a plurality of claws located in a circumferential direction at an end face of an inner ring and protruding from the end face of an inner ring in an axial direction. A lock mechanism can be used to fasten the claws to a shaft. At least one of the plurality of claws has an opening provided therein.Type: ApplicationFiled: April 18, 2024Publication date: October 24, 2024Applicant: NTN CORPORATIONInventors: Masaki KATO, Mitsuhiko YOSHIKAWA