Control flap for controlled exhaust gas recirculation and method for its production

US11713736B2 · kind B2 · utility

Assignee

• Umfotec GmbH · DE

Inventors

• Ralf Buck · Schelldorf, DE
• Gerald A. Wedekind · Oettingen, DE
• Bodo Waterstraat · Talhausen, DE
• Dirk Nagel · Paderborn, DE
• Thomas Kaiser · Köngen, DE

Key dates

• Filing date: Mar 31, 2021
• Grant date: Aug 1, 2023
• Expiry date: Jul 3, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/7506
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A control flap (1) has a flap body (2) and a circumferential seal (3) capable of sealing upon abutting to a sealing surface (7) of an opening (8). The flap body (2) and the seal (3) are made of elastomers. The seal (3) is joined to the flap body (2) by a pressure plate (4) made of a thermoplastic. The control flap may be made by a method that includes: producing the flap body (2) from a thermoplastic by injection molding; producing the pressure plate (4) from a thermoplastic by injection molding; producing the seal (3) from an elastomer by injection molding; introducing the pressure plate (4) into the undercut (10) of the seal (3); inserting the pressure plate (4) with the seal (3) into the recess (16) of the flap body (2) and bonding the pressure plate (4) and flap body (2).