Patents Assigned to NTN Corporation
  • Patent number: 12285864
    Abstract: A link actuation device includes a proximal link hub, a distal link hub, link mechanisms that couple the link hubs, an actuator, and a control device. The actuator includes motors provided for link mechanisms, respectively. The control device stores a map in which drive command values for each of the motors corresponding to a plurality of discrete positions within a movable range of the distal link hub are stored. Upon receipt of a command value for movement to a position that coincides with none of the plurality of positions within the movable range, the control device determines a drive command value for each of the motors by interpolating a region surrounded by four points at the plurality of positions on the map using a polynomial curved surface formula.
    Type: Grant
    Filed: March 9, 2023
    Date of Patent: April 29, 2025
    Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, NTN Corporation
    Inventors: Akihiro Hayashi, Hirofumi Fukumaru, Toshiki Takaki
  • Patent number: 12276265
    Abstract: A windmill includes a shaft, a blade, and a supporting member. The windmill is rotatable about a center axis of the shaft. The blade has a blade main body portion extending along an axial direction that is a direction of the center axis. When viewed in a cross sectional view orthogonal to the axial direction, the blade main body portion includes a front edge and a rear edge, the front edge being an end on a front side in a rotation direction of the windmill, the rear edge being an end on a rear side in the rotation direction. The supporting member extends along a radial direction orthogonal to the axis direction and passing through the center axis, so as to connect the shaft and the blade main body portion to each other.
    Type: Grant
    Filed: March 10, 2022
    Date of Patent: April 15, 2025
    Assignee: NTN Corporation
    Inventor: Takeru Ito
  • Patent number: 12188835
    Abstract: 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: Grant
    Filed: August 19, 2020
    Date of Patent: January 7, 2025
    Assignees: KOA Corporation, NTN Corporation
    Inventors: Homare Kaneko, Natsumi Shiobara, Koichi Urano, Yusuke Shibuya, Daichi Kondou
  • Patent number: 12157194
    Abstract: 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: Grant
    Filed: September 8, 2021
    Date of Patent: December 3, 2024
    Assignee: NTN Corporation
    Inventor: Shohei Hashizume
  • Patent number: 12157224
    Abstract: 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: Grant
    Filed: October 26, 2021
    Date of Patent: December 3, 2024
    Assignee: NTN Corporation
    Inventor: Naohiko Satou
  • Patent number: 12090783
    Abstract: Provided is a bearing device for a vehicle wheel that is suitable in being able to prevent impairment in assemblability of the bearing device for a vehicle wheel to a knuckle without cost increase. A bearing device for a vehicle wheel (1) is provided with an inner member and an outer ring (2) which is an outer member having a vehicle-body-mounting flange part (2d), wherein the outer ring (2) has a pilot part (2e) disposed inward of the vehicle-body-mounting flange part (2d), and the pilot part (2e) has a fitting portion (2f) configured to be fitted to a knuckle (10) and a guiding portion (2g) having a diameter which gradually decreases inward from the inner-side end of the fitting portion (2f).
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: September 17, 2024
    Assignee: NTN Corporation
    Inventors: Shigeaki Fukushima, Natsuko Nagai
  • Patent number: 12055184
    Abstract: The present invention provides a bearing device for vehicle wheel reducing the occurrence of abnormal heat generation caused by metal contact and enhancing anti-seizing properties. Each of the tapered rollers 4 has a large diameter-side end surface 41, the inner raceway surface 31, and the large flange part 32. The large flange part 32 includes a chamfered part 32c and a rounded part 32d. The large flange part 32 has a large flange part-side cutout part 34, the large diameter-side end surface 41 of each of the tapered rollers 32 has a tapered roller-side cutout part 43 having a circular shape formed coaxially with the large diameter-side end surface 41, and a clearance of the large diameter-side end surface 41 as viewed from a contact point between the large diameter-side end surface 41 and the guide surface 32a is greater than or equal to 15 ?m.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: August 6, 2024
    Assignee: NTN Corporation
    Inventor: Tomoki Matsushita
  • Publication number: 20240158727
    Abstract: This cellular tissue production method can produce a cellular tissue with high density and high shape retainability while the cell viability is maintained, and includes: a first application step of applying a first application liquid to an application target; and a second application step of applying and layering a second application liquid onto the first application liquid applied in the first application step, wherein the second application step includes subjecting an interface between the first application liquid and the second application liquid to gelation while the first application liquid is kept fluid.
    Type: Application
    Filed: March 3, 2020
    Publication date: May 16, 2024
    Applicants: OSAKA UNIVERSITY, NTN Corporation
    Inventors: Mitsuru AKASHI, Takami AKAGI, Atsushi ODA, Shohei CHIKAE
  • Patent number: 11965562
    Abstract: An outer member of a rotation transmission device has an opening integral with an inner peripheral portion of the outer member. Engaging elements are disposed between an inner member and the inner peripheral portion. An outer ring is fitted to the inner peripheral portion. A first snap ring is attached to the inner peripheral portion. An inner ring is fitted to an end portion of the inner member at one axial end thereof. A second snap ring is attached to the end portion through the opening. A shaft is connected to the opening so as to be rotatable in unison with and coaxially with the outer member.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: April 23, 2024
    Assignee: NTN Corporation
    Inventor: Koji Sato
  • Patent number: 11940010
    Abstract: A bearing apparatus supports a rotating body with a bearing including an inner ring, an outer ring, and a rolling element. The bearing apparatus includes a power generator including a Peltier element variable in amount of power generation depending on a temperature difference between the inner ring and the outer ring caused in the bearing and an abnormality sensing apparatus that senses abnormality of the bearing based on the amount of power generation by the power generator. Preferably, the abnormality sensing apparatus senses abnormality of the bearing based on any of the amount of power generation by the power generator, a time derivative value of the amount of power generation, and following relation between the amount of power generation and another parameter. The bearing apparatus and a spacer in which abnormality of the bearing can accurately be sensed early are thus provided.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: March 26, 2024
    Assignee: NTN Corporation
    Inventor: Shohei Hashizume
  • Publication number: 20240068511
    Abstract: An insulated bearing device is provided which includes a housing, an outer ring and rolling elements, and in which an insulating film for providing electrical insulation between the housing and the outer ring is disposed on the surface of the outer ring. The insulating film includes a straight portion extending along the outer periphery of the outer ring and having a constant outer diameter in the axial direction. The housing has, on the inner periphery of its housing hole, an inner peripheral cylindrical surface formed at a position intersecting with the axial centerlines of the rolling elements, and the straight portion is fitted to, and in contact with, the inner peripheral cylindrical surface. The contact range between the inner peripheral cylindrical surface and the straight portion has an axial length shorter than the entire axial length of the straight portion.
    Type: Application
    Filed: October 26, 2021
    Publication date: February 29, 2024
    Applicant: NTN Corporation
    Inventors: Hayato KAWAGUCHI, Toshiki MASUDA
  • Patent number: 11867235
    Abstract: A plummer block includes a bearing and a bearing housing that accommodates and supports the bearing. The bearing housing includes an upper housing portion and a lower housing portion that is separate from the upper housing portion. The upper housing portion has a first surface facing downward. The lower housing portion has a second surface facing upward. The first surface has: a contact region in contact with the second surface; and a first protruding region protruding from the contact region at least outward in a radial direction of the bearing when viewed in the up-down direction.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: January 9, 2024
    Assignee: NTN Corporation
    Inventor: Daigo Kimura
  • Publication number: 20230341009
    Abstract: A one-way clutch includes a C-shaped spring having one end thereof engaged by the inner ring and the other end abutting a roller at one end of a row of rollers that abut each other, thereby engaging the rollers with the outer ring and the inner ring. The inner ring has a radius at the engaging end of the cam surface opposed to the roller at the other end of the row of the rollers larger than its radii at the engaging ends of the cam surfaces opposed to the other rollers of the same row.
    Type: Application
    Filed: September 14, 2021
    Publication date: October 26, 2023
    Applicant: NTN Corporation
    Inventor: Shoji ITOMI
  • Patent number: 11773899
    Abstract: A rolling bearing includes an inner ring, an outer ring, rolling elements, and a retainer that holds the rolling elements. The retainer includes a metal portion and a sliding resin portion The metal portion has communication holes each having a plurality of openings on the surface of the metal portion, and the sliding resin portion is disposed in the communication holes.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: October 3, 2023
    Assignee: NTN Corporation
    Inventor: Tomoya Nakamura
  • Publication number: 20230272820
    Abstract: A bearing device is provided which achieves both creep resistance and electrolytic corrosion resistance. At least one of the radially inner surface of the inner ring and the radially outer surface of the outer ring is covered with a coating layer. The coating layer is a coating layer composite composed of a plurality of layers. Of the plurality of layers, the surface layer is composed of an anti-creep film having lubricity, and at least one layer other than the surface layer is composed of an insulating film having insulating properties.
    Type: Application
    Filed: August 26, 2021
    Publication date: August 31, 2023
    Applicant: NTN Corporation
    Inventors: Hayato KAWAGUCHI, Toshiki MASUDA
  • Publication number: 20220373030
    Abstract: A tapered roller bearing is provided in which, in order to prevent a sharp rise in temperature and rotate the bearing smoothly even when the bearing is used under sever lubrication conditions, when considering: (i) a reference point which is the intersection point between the imaginary line extending from the generatrix of the raceway surface of the inner ring toward a grinding undercut, and the imaginary line extending from the generatrix of a large flange surface toward the grinding undercut; (ii) the undercut width A of the grinding undercut from the reference point to the large flange surface; and (iii) the width RC of a chamfer of each tapered roller in the direction along the generatrix of the large flange surface, the width RC is 0.7 mm or less and the relationship between A and RC is A<RC.
    Type: Application
    Filed: September 14, 2020
    Publication date: November 24, 2022
    Applicant: NTN Corporation
    Inventor: Takashi KAWAI
  • Patent number: 11493089
    Abstract: A rolling bearing makes use of a porous rolling element and a selected kind of lubricant to impregnate with; is usable in various conditions; does not discharge foreign objects; and features low dust generation and long life. The rolling bearing includes an outer ring 2; an inner ring 1; and a plurality of rolling elements 3 assembled between mutually opposed outer ring track surface 2a and inner ring track surface 1a. The plurality of rolling elements 3 is provided by a combination of a porous rolling element 3a impregnated with a lubricant and a non-porous rolling element 3b.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: November 8, 2022
    Assignee: NTN Corporation
    Inventor: Tsutomu Maiwa
  • Patent number: 11478845
    Abstract: A forging apparatus includes an ironing mechanism and a phase alignment mechanism. The ironing mechanism includes: a punch set, which is fitted into a cylindrical portion of a pre-processing material to be formed into the outer joint member, and is radially expandable and contractible, the cylindrical portion having grooves formed in an inner peripheral surface thereof; and a die having a hole into which the cylindrical portion is press-fitted. The phase alignment mechanism is configured to align phases of the grooves in the inner peripheral surface of the pre-processing material and phases of track groove portion forming surfaces of the punch set with each other before the pre-processing material is fitted to the punch set.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: October 25, 2022
    Assignee: NTN Corporation
    Inventors: Jun Numamoto, Takuya Fujita
  • Publication number: 20220333640
    Abstract: A tapered roller bearing is provided in which, in order to prevent a sharp rise in temperature and rotate the bearing smoothly even when the bearing is used under sever lubrication conditions, a grinding undercut has an undercut width A of 0.5 mm or less from a reference point to a large flange surface, the reference point being the intersection point of the imaginary line extending from the generatrix of the raceway surface of the inner ring toward the grinding undercut, and the imaginary line extending from the generatrix of the large flange surface toward the grinding undercut.
    Type: Application
    Filed: September 14, 2020
    Publication date: October 20, 2022
    Applicant: NTN Corporation
    Inventor: Takashi KAWAI
  • Patent number: 11460071
    Abstract: An object of the present invention to provide a tapered roller bearing in which a flange portion is formed at a large-diameter end of an outer ring track surface of an outer ring, capable of providing high moment stiffness and long life without extremely decreasing its pure axial load capacity.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: October 4, 2022
    Assignee: NTN Corporation
    Inventors: Yasuyoshi Hayashi, Takashi Wakisaka, Sahoko Manda