MAGNETIC LIFT DEVICE HAVING MAGNETIC-FIELD ADJUSTING FUNCTION

WIPO Patent Application WO/2021/020827

A1

A magnetic lift device comprises a first pole piece, a second pole piece, a rotary permanent magnet, a magnet rotating unit, and a pole piece connecting unit. The first pole piece is magnetically connected to the N pole of a fixed permanent magnet, the second pole piece is magnetically connected to the S pole of the fixed permanent magnet, the rotary permanent magnet is rotatably formed so as to be selectively arranged between a first arrangement in which the N pole is magnetically connected to the second pole piece and the S pole is magnetically connected to the first pole piece, and a second arrangement in which the N pole is magnetically connected to the first pole piece and the S pole is magnetically connected to the second pole piece, the magnet rotating unit rotates the rotary permanent magnet so as to switch between the first and second arrangements, thereby controlling the magnetic force applied to an object to be lifted through the first pole piece and the second pole piece, and the pole piece connecting unit magnetically connects the first pole piece to the second pole piece in order to prevent saturation of the magnetic flux in the object to be lifted.

PARK SANG HUN (KR)
BAEK MYUNG KI (KR)
KWAK CHANG SEOB (KR)
YEO CHANG HO (KR)
CHONG JIN KYO (KR)

PCT/KR2020/009835

February 04, 2021

July 27, 2020

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KOREA ELECTRO TECH RESEARCH INSTITUTE (KR)

B66C1/04; B66C13/12

KR20120130040A	2012-11-28
KR20020035934A	2002-05-16
KR101512610B1	2015-04-15
KR20060091946A	2006-08-22
JP3165203U	2011-01-06

B&IP-JOOWON PATENT AND LAW FIRM (KR)

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