Patent · US Active

Line pipe for the transport of deep-frozen media

US7681599B2 · kind B2 · utility

3Cited by

5References

4Claims

0Family size

Assignee

NEXANS · FR

Inventors

Stephan Lange · St. Leon-Rot, DE
Michele Di Palma · Springe, DE
Christian Frohne · Hannover, DE
Klaus Schippl · Hannover, DE
Thomas Merten · Gifhorn, DE

Key dates

Filing date	Nov 14, 2006
Grant date	Mar 23, 2010
Priority date	—
Expiry date	Aug 26, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16L59/141
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A line pipe for the transport of deep-frozen media, consisting of at least two corrugated metal pipes (2, 4) arranged concentrically and at a distance from one another, an insulation layer (3) being arranged in the annular gap between the two metal pipes (2, 4), the annular gap being evacuated, and a closing valve (10) provided in the outer metal pipe (4) being connectable to a vacuum pump, the closing valve being welded, vacuum-tight, into a smooth-walled metal pipe (9) welded, vacuum-tight, to the exterior of the metal pipes (4). The valve body (10) of the closing valve projects into the interior of the smooth-walled metal pipe (9) and is flush with the outer surface area of the smooth-walled metal pipe (9).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.