公开(公告)号：US20190201887A1

公开(公告)日：2019-07-04

申请号：US15859266

申请日：2017-12-29

Applicant: AP SYSTEMS INC.

Inventor： Jae Keun HYUN ,  Hee Woon LEE ,  Yong Seok KIM

IPC: B01L1/02 ,  E05C19/16 ,  E05F5/02

CPC classification number: B01L1/025 ,  B01L2300/041 ,  B01L2300/043 ,  B01L2300/10 ,  E05C19/166 ,  E05D3/08 ,  E05F5/02 ,  E05F15/611 ,  E05Y2201/212 ,  E05Y2900/21

Abstract: Provided is a door apparatus that is installed on a chamber including an inner space and an opening defined in one surface thereof. The door includes a cover unit configured to cover the opening, a first magnetic unit installed on the cover unit or the chamber, and a second magnetic unit installed on the cover unit or the chamber to face the first magnetic unit, converting a polarity thereof, and coupled to the first magnetic unit in a separable manner