Patent · US Expired

Vacuum brake power booster, in particular for motor vehicles

US5095805A · kind A · utility

2Cited by

8References

9Claims

0Family size

Assignee

Alfred Teves GmbH · DE

Inventors

Peter Boehm · Frankfurt am Main, DE
Wilfried Wagner · Hamburg, DE
Manfred Rueffer · Pocking, DE
Bernd Toepperwien · Roßdorf, DE

Key dates

Filing date	May 4, 1990
Grant date	Mar 17, 1992
Priority date	—
Expiry date	May 4, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86919
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A vacuum brake power booster, in particular for motor vehicles, which includes a poppet valve (12) sealing two valve seats (18, 19) and which is axially deformable within the area of a rolling fold (15) also includes an annular part which is either mounted on the outside of the rolling fold (15) in a form-fit manner or arranged inside the elastic material (24) of the poppet valve (12). This annular part prevents the rolling fold (15) from being blown up outwardly due to the pressure differential prevailing between its two sides so that it will be possible to reduce the return force and thus also the response force.

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