Surface heating system formed by a fluid-conducting inner pipe surrounded by a heat-destructible sheathing tube structure

US6255623A · kind A · utility

Assignee

• Hewing GmbH · DE

Inventors

• Franz-Josef Riesselmann · Löhne, DE
• Bernhard Dankbar · Ochtrup, DE

Key dates

• Filing date: May 4, 2000
• Grant date: Jul 3, 2001
• Expiry date: May 4, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B30/00
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A surface heating conduit (18) includes a fluid-conducting inner pipe (14), a sheathing tube structure (24) surrounding the fluid-conducting inner pipe (14) serving as a thermal shield for protecting the fluid-conducting inner pipe (14) from external heat influences and which is designed such that, when the surface heating conduit (18) is embedded in a layer (12) of hot mastic asphalt that is cooling down from its working temperature, the sheathing tube structure (24) is destroyed thereby protecting the fluid-conducting inner pipe (14) against thermal influences deleterious to the functionality of the inner pipe.