EP 3814165 B1 20221214 - A METHOD OF USING AIR AND HELIUM IN LOW-PRESSURE TUBE TRANSPORTATION SYSTEMS
Title (en)
A METHOD OF USING AIR AND HELIUM IN LOW-PRESSURE TUBE TRANSPORTATION SYSTEMS
Title (de)
VERFAHREN ZUR VERWENDUNG VON LUFT UND HELIUM IN NIEDERDRUCKROHRTRANSPORTSYSTEMEN
Title (fr)
PROCÉDÉ D'UTILISATION D'AIR ET D'HÉLIUM DANS DES SYSTÈMES DE TRANSPORT PAR TUBE À BASSE PRESSION
Publication
Application
Priority
US 2018040357 W 20180629
Abstract (en)
[origin: WO2020005278A1] A method is described for maintaining a gaseous composition within a tube (that is part of tubular transportation system for transporting passengers or cargos via a capsule), where the tube is arranged along a predetermined route. The method comprises: (a) pumping the tube to a pressure that is below atmospheric pressure until the tube is substantially evacuated; (b) identifying a predetermined power value; (c) identifying a first percentage, x, of helium based on the predetermined power value identified in (b) and a leak rate associated with the tube; (d) maintaining, within each tube in the plurality of substantially evacuated tubes, a gaseous composition a gaseous composition comprising a mixture of a first percentage, x, of helium and a second percentage, (100-x), of air.
IPC 8 full level
B60L 13/03 (2006.01); B60L 13/10 (2006.01); B61B 13/08 (2006.01); B61B 13/10 (2006.01); B61B 13/12 (2006.01); B65G 53/04 (2006.01); E01B 25/30 (2006.01)
CPC (source: EP)
B61B 13/10 (2013.01); E01B 25/30 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2020005278 A1 20200102; CN 112654524 A 20210413; EP 3814165 A1 20210505; EP 3814165 A4 20220316; EP 3814165 B1 20221214; ES 2943659 T3 20230615
DOCDB simple family (application)
US 2018040357 W 20180629; CN 201880097026 A 20180629; EP 18924874 A 20180629; ES 18924874 T 20180629