Active seal assemblies for sound isolation

US7594359B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Andrew C. Keefe · Calabasas, US
• William Barvosa-Carter · Ventura, US
• Christopher P. Henry · Thousand Oaks, US
• Guillermo A. Herrera · Calabasas, US
• Geoffrey P. Mc Knight · Los Angeles, US
• Nancy L. Johnson · Northville, US

Key dates

• Filing date: Mar 8, 2005
• Grant date: Sep 29, 2009
• Expiry date: Apr 15, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/064
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Active seal assemblies employing active materials that can be controlled and remotely changed to alter the seal effectiveness, wherein the active seal assemblies actively change modulus properties such as stiffness, shape orientation, and the like. The active seal assemblies are generally configured to reduce the noise (sound waves) that is transmitted through the seal by measuring and actively canceling and/or absorbing the noise.