Patents by Inventor Kanta SATO
Kanta SATO 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: 11680628Abstract: In the ball screw device, the circulation path that returns balls from the end point to the start point of the load path includes a return path, scooping paths, and connecting paths. The scooping path has an arc-shaped center line that is curved outward in the radial direction as going toward the reference imaginary flat plane including the center axis of the screw shaft and the center line of the return path in the circumferential direction. The connecting path is arranged on the reference imaginary flat plane and includes a straight path having a linear center line extending in a direction orthogonal to the center axis of the screw shaft. When the radius of curvature of the center line of the scooping path is R1, the scooping angle is ?, and the entire length of the straight path is S, R1 cos(90°??)+S is made larger than the diameter of the balls.Type: GrantFiled: March 10, 2021Date of Patent: June 20, 2023Assignee: NSK LTD.Inventors: Kazuya Yamada, Yuji Shimomura, Kanta Sato, Yasuaki Abe
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Patent number: 11662003Abstract: A ball screw device has a screw shaft; a nut; a circulation part; and balls; a housing concave groove provided on the outer circumferential surface of the nut and linearly extending in the axial direction and opening to end surfaces on both outer sides in the axial direction of the nut, a circulation part arranged inside the housing concave groove, and the circulation part being prevented from displacing toward the outer side in the radial direction and displacing in the circumferential direction with respect to the nut by engaging an engaging convex portion of a fixing portion provided in the end portion on each of both outer sides in the axial direction of the circulation part with an engaging recess portion provided in the end portion of each of both outer sides in the axial direction of the housing concave groove.Type: GrantFiled: March 12, 2021Date of Patent: May 30, 2023Assignee: NSK LTD.Inventors: Kazuya Yamada, Yuji Shimomura, Yasuaki Abe, Kanta Sato
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Publication number: 20230087898Abstract: In the ball screw device, the circulation path that returns balls from the end point to the start point of the load path includes a return path, scooping paths, and connecting paths. The scooping path has an arc-shaped center line that is curved outward in the radial direction as going toward the reference imaginary flat plane including the center axis of the screw shaft and the center line of the return path in the circumferential direction. The connecting path is arranged on the reference imaginary flat plane and includes a straight path having a linear center line extending in a direction orthogonal to the center axis of the screw shaft. When the radius of curvature of the center line of the scooping path is R1, the scooping angle is ?, and the entire length of the straight path is S, R1 cos(90°??)+S is made larger than the diameter of the balls.Type: ApplicationFiled: March 10, 2021Publication date: March 23, 2023Applicant: NSK LTD.Inventors: Kazuya YAMADA, Yuji SHIMOMURA, Kanta SATO, Yasuaki ABE
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Publication number: 20230015290Abstract: A ball screw device has a screw shaft; a nut; a circulation part; and balls; a housing concave groove provided on the outer circumferential surface of the nut and linearly extending in the axial direction and opening to end surfaces on both outer sides in the axial direction of the nut, a circulation part arranged inside the housing concave groove, and the circulation part being prevented from displacing toward the outer side in the radial direction and displacing in the circumferential direction with respect to the nut by engaging an engaging convex portion of a fixing portion provided in the end portion on each of both outer sides in the axial direction of the circulation part with an engaging recess portion provided in the end portion of each of both outer sides in the axial direction of the housing concave groove.Type: ApplicationFiled: March 12, 2021Publication date: January 19, 2023Applicant: NSK Ltd.Inventors: Kazuya YAMADA, Yuji SHIMOMURA, Yasuaki ABE, Kanta SATO
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Publication number: 20220409649Abstract: [Object] To provide a composition having an excellent ?-glucosidase inhibitory effect or invertase inhibitory effect.Type: ApplicationFiled: August 3, 2020Publication date: December 29, 2022Inventors: Atsushi TAGA, Tetsushi YAMAMOTO, Kanta SATO
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Patent number: 11384821Abstract: A ball screw device includes: a screw shaft the outer peripheral surface of which has a first thread groove; a nut the inner peripheral surface of which is provided with a second thread groove that matches the first thread groove, and the outer peripheral surface of which is provided with a through hole; a plurality of balls that roll between the first thread groove and the second thread groove; a circulation component including a main body part and a pair of leg parts provided on both ends of the main body part, and that is provided on the nut; and a pin component that fixes the circulation component to the nut. Each of the leg parts is inserted into the through hole, the pin component is provided on the leg part in an overlapping manner, and the leg part is retained in the through hole by the pin component.Type: GrantFiled: February 12, 2020Date of Patent: July 12, 2022Assignee: NSK LTD.Inventors: Kanta Sato, Yasuaki Abe, Kazuya Yamada, Motoshi Sakai
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Publication number: 20220042582Abstract: A ball screw device includes: a screw shaft the outer peripheral surface of which has a first thread groove; a nut the inner peripheral surface of which is provided with a second thread groove that matches the first thread groove, and the outer peripheral surface of which is provided with a through hole; a plurality of balls that roll between the first thread groove and the second thread groove; a circulation component including a main body part and a pair of leg parts provided on both ends of the main body part, and that is provided on the nut; and a pin component that fixes the circulation component to the nut. Each of the leg parts is inserted into the through hole, the pin component is provided on the leg part in an overlapping manner, and the leg part is retained in the through hole by the pin component.Type: ApplicationFiled: February 12, 2020Publication date: February 10, 2022Applicant: NSK LTD.Inventors: Kanta SATO, Yasuaki ABE, Kazuya YAMADA, Motoshi SAKAI