Muffler with variable acoustic properties

US7182171B2 · kind B2 · utility

Assignee

• Heinrich Gillet GmbH · DE

Inventors

• Rico Weinert · Gommersheim, DE
• Alexander Schinko · Mannheim, DE
• Bernd Fuhrmann · Speyer, DE
• Katja Hirschberger · Mutterstadt, DE
• Michael Burkart · Siebeldingen, DE

Key dates

• Filing date: Apr 27, 2004
• Grant date: Feb 27, 2007
• Expiry date: May 23, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7935
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A muffler with variable acoustic properties. A pressure cell with a diaphragm, a spring, a piston, a piston rod, a closing element on the piston rod, and a pressure connection line are integrated into a housing. The diaphragm is thermally insulated against the piston rod. Another layer of thermal insulation is provided between the closing element and the pressure cell.