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:
Jul. 21, 2015
Filed:
Jun. 16, 2009
Franz Borgel, Dirmstein, DE;
Alfred Krause, Speyer, DE;
Mirko Kreitschmann, Mannheim, DE;
Anton Meier, Birkenheide, DE;
Frank-friedrich Pape, Kleinniedesheim, DE;
Wolfgang Reif, Frankenthal, DE;
Michael Salla, Meckenheim, DE;
Franz Borgel, Dirmstein, DE;
Alfred Krause, Speyer, DE;
Mirko Kreitschmann, Mannheim, DE;
Anton Meier, Birkenheide, DE;
Frank-Friedrich Pape, Kleinniedesheim, DE;
Wolfgang Reif, Frankenthal, DE;
Michael Salla, Meckenheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A method for reliably avoiding backflow in the transport of a liquid under pressure via a transport pipe (), in which a shut-off device () with differential pressure switching is arranged, into a container () which is under pressure and which comprises the liquid to be transported and/or another liquid is proposed, wherein a pressure accumulator () which is filled with the liquid to be transported up to a certain level and above the liquid level, in direct contact with the liquid to be transported, with an inert gas is arranged in the transport pipe () upstream from the shut-off device () in the transport direction, the inert gas being provided in the pressure accumulator () under an excess pressure and in an amount relative to the container () to be filled which are designed so that, in the case of a drop in the pressure in the transport pipe (), the inert gas ensures a positive pressure difference in the transport pipe () to the container () over a period which is at least as long as the reaction time of the shut-off device () and the shut-off device () has an emptying pipe () with emptying valve ().