公开(公告)号：US11241738B2

公开(公告)日：2022-02-08

申请号：US16421687

申请日：2019-05-24

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong Bok Lee ,  Jungwan Kim ,  Sena Jeong ,  Bok Seong Choe ,  Wonil Kwak ,  Jaeseung Byun

IPC: B22F9/10 ,  B22F9/08 ,  B33Y10/00 ,  B33Y30/00 ,  B01J2/12

Abstract: A metal powder manufacturing apparatus for a metal 3-dimensional (3D) printer includes a driving unit which generates a rotational force, a metal beam connected to the driving unit to receive the rotational force from the driving unit and having one end disposed in a vacuum chamber, and a shaft support which supports an outer circumference of the metal beam using a magnetic force for relative movement of the metal beam in a lengthwise direction of the metal beam, wherein the shaft support is disposed such that an inner side is spaced apart a predetermined distance from the outer circumference of the metal beam, and can support the metal beam at an adjusted relative distance from the metal beam.

公开(公告)号：US20180340574A1

公开(公告)日：2018-11-29

申请号：US15964119

申请日：2018-04-27

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong Bok Lee ,  Bok Seong Choe ,  Sangmin Han ,  Jeon Kook Lee

IPC: F16C39/06 ,  F16C19/16 ,  F16C35/06

CPC classification number: F16C39/063 ,  F16C19/16 ,  F16C27/04 ,  F16C33/3831 ,  F16C33/3881 ,  F16C35/06 ,  F16C43/065 ,  F16C2202/40

Abstract: Disclosed is a ball bearing including an inner ring and an outer ring spaced apart from each other, each being rotatable, a cage part including a first cage and a second cage rotatably installed between the inner ring and the outer ring, and having ball receiving part formed along circumferential direction, ball installed in the ball receiving part, and rotating with the cage part as at least one of the inner ring and the outer ring rotates, and magnet which provides a magnetic force to the ball, wherein the first cage has a first seating part which is formed between the ball receiving parts, and on which one side of the magnet is placed, and the second cage has a second seating part which is connected to the first seating part, and on which the other side of the magnet is placed.