The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Aug. 21, 2018
Applicant:
Semes Co., Ltd., Cheonan-si, KR;
Inventors:
Assignee:
SEMES CO., LTD., Cheonan-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B61L 13/00 (2006.01); H01L 21/677 (2006.01); B60L 13/00 (2006.01);
U.S. Cl.
CPC ...
H01L 21/67766 (2013.01); B60L 13/00 (2013.01); H01L 21/6773 (2013.01); H01L 21/67709 (2013.01); H01L 21/67775 (2013.01);
Abstract
A tower lift includes a main frame extending in a vertical direction, a movable frame configured to be movable in the vertical direction along the main frame, a carriage module mounted to the movable frame, a pair of driving rails extending parallel with each other on the main frame and comprising a plurality of first permanent magnets and a plurality of second permanent magnets arranged in the vertical direction, respectively, a driving wheel disposed between the driving rails to be spaced apart from the driving rails and comprising a plurality of third permanent magnets arranged in a circumferential direction, and a driving unit for rotating the driving wheel.