Patent · US Expired

Coolant line for air conditioning systems

US6354332B1 · kind B1 · utility

38Cited by

12References

23Claims

0Family size

Assignee

Witzenmann GmbH Metallschlauch-Fabrik Pforzheim · DE

Inventors

Carlo Burkhardt · Neuenbürg, DE
Richard Bantscheff · Tiefenbronn, DE
Bernhard Heil · Eberbach, DE
Kai Kowalewsky · Rutesheim, DE
Frank Picard · Rodgau, DE
Klaus Rettkowski · Maulbronn, DE

Key dates

Filing date	Apr 28, 2000
Grant date	Mar 12, 2002
Priority date	—
Expiry date	Apr 28, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16L27/111
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A coolant line for air-conditioning systems that are operated with carbon dioxide as a coolant, particularly air-conditioning systems of motor vehicles, can be tightly connected at both ends to connecting parts. The line has an inside, metallic, corrugated hose that is coolant-tight, a radially pressure-resistant, flexible, metallic jacket that surrounds the hose with radial spacing and provides axial support, and a compression-proof, temperature-resistant intermediate plastic layer that fills the space between at least the radially-outside corrugation crests of the metal hose and the jacket so as to prevent play.

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