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:
May. 03, 2022
Filed:
Jul. 19, 2018
Korea Railroad Research Institute, Uiwang-si, KR;
Jae Heon Choe, Anyang-si, KR;
Kwan Sup Lee, Gunpo-si, KR;
Su Yong Choi, Changwon-si, KR;
Chang Young Lee, Bucheon-si, KR;
Jung Youl Lim, Seoul, KR;
Jin Ho Lee, Seoul, KR;
Yong Jun Jang, Anyang-si, KR;
Jeong Min Jo, Suwon-si, KR;
Min Hwan Ok, Uiwang-si, KR;
Jae Hoon Kim, Goyang-si, KR;
KOREA RAILROAD RESEARCH INSTITUTE, Uiwang-si, KR;
Abstract
A tube infrastructure includes a first tube; a second tube that is coupled to the first tube; and a fluid tank that is disposed to surround a coupling region of the first tube and the second tube and is filled with a fluid to seal the coupling region, wherein the fluid tank allows negative pressure to be maintained inside the first tube and the second tube.