US 12,240,709 B2
Tower lift
Hee Jae Byun, Yongin-si (KR); Sang Oh Kim, Seoul (KR); Na Hyun Lee, Ansan-si (KR); and Myung Jin Lee, Hwaseong-si (KR)
Assigned to SEMES CO., LTD., Cheonan-si (KR)
Filed by SEMES CO., LTD., Cheonan-si (KR)
Filed on May 22, 2022, as Appl. No. 17/750,359.
Claims priority of application No. 10-2021-0168350 (KR), filed on Nov. 30, 2021.
Prior Publication US 2023/0166925 A1, Jun. 1, 2023
Int. Cl. B66F 7/02 (2006.01); B65G 47/90 (2006.01); B66F 11/00 (2006.01); H01L 21/677 (2006.01)
CPC B65G 47/904 (2013.01) [B65G 47/905 (2013.01); B66F 11/00 (2013.01); B66F 7/02 (2013.01); H01L 21/67712 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tower lift comprising:
a main frame;
a first carriage module and a second carriage module connected with each other inside the main frame at left and right sides of the main frame, respectively, having the same weight as each other, and configured to be moved in a vertical direction;
a driving module installed on the main frame and configured to move the first carriage module and the second carriage module in the vertical direction; and
a fall detection sensor installed on at least one of the first carriage module and the second carriage module and configured to detect fall of at least one of the first carriage module and the second carriage module.