Flap valve

US6604516B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Erwin Krimmer · Plüderhausen, DE
• Ralph Krause · Waiblingen, DE

Key dates

• Filing date: May 11, 2001
• Grant date: Aug 12, 2003
• Expiry date: Jul 24, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M26/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a flap valve for controlling a gas stream, having a valve tube that carries the gas stream and having a valve flap, disposed in the valve tube, that is pivotable between a closing position and an open position and is seated in a manner fixed against relative rotation on an adjustable flap shaft, to avoid openings of the shaft in the valve tube inside the sealing region between the valve flap and the valve tube, the flap shaft is oriented such that its axis forms an acute angle (&agr;) with the axis of the valve tube. The valve flap seated on the flap shaft in a manner fixed against relative rotation is oriented such that in its closing position, its surface normal is aligned with the axis of the valve tube or extends at an acute angle to it.