Patent · US Expired

Flap valve

US6880807B2 · kind B2 · utility

1Cited by

4References

19Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Michael Runft · Welzheim, DE
Ralph Krause · Waiblingen, DE
Uwe Knauss · Vilshofen an der Donau, DE

Key dates

Filing date	Jun 14, 2002
Grant date	Apr 19, 2005
Priority date	—
Expiry date	Jul 25, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M26/70
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A flap valve for controlling a gas flow has an elastically deformable valve tube that conveys the gas flow and having a valve flap that is disposed in the valve tube for movement between an open position and a closed position by a flap shaft that can be driven in order to adjust the valve flap and which is disposed at an acute angle in relation to the valve tube axis, to which shaft the valve flap is fastened so that in the closed position of the valve flap, the flap normal encloses an acute angle with the valve tube axis, in order to assure only a slight amount of leakage in the closed position of the valve flap and a low opening torque, the outer contour of the valve flap is approximately oval in shape. Preferably, the outer contour is embodied as an ellipse.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.