Sound-insulated flow duct and process for the manufacture thereof

US4615411A · kind A · utility

Assignees

• Dynamit Nobel GmbH · DE
• Helmut Rehlen · DE
• Jurgen Roellinghoff · DE

Inventors

• Hans-Ulrich Breitscheidel · Siegburg, DE
• Cosmas Lorry · Niederkassel, DE
• Helmut Rehlen · Bad Schussenried, DE
• Jurgen Roellinghoff · Ochsenhausen, DE

Key dates

• Filing date: May 24, 1983
• Grant date: Oct 7, 1986
• Expiry date: May 24, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249988
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A sound-insulated flow duct is provided with walls made up of a composite of an elastic thermoplastic, predominantly closed-cell foam material as the outer layer and an open-cell, elastic soft foam material as the inner layer.