Patent · US Expired

Vacuum brake booster for motor vehicles

US5680807A · kind A · utility

3Cited by

6References

20Claims

0Family size

Assignee

ITT Automotive Europe GmbH · DE

Inventors

Wilfried Wagner · Hamburg, DE
Ralf Jakobi · Flörsheim, DE
Kai-Michael Graichen · Langen, DE

Key dates

Filing date	Nov 13, 1995
Grant date	Oct 28, 1997
Priority date	—
Expiry date	Nov 13, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T13/569
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

To prevent a rolling diaphragm (13), which forms the movable wall (4) of a vacuum brake booster along with a metallic diaphragm disk (12), from becoming detached from an annular groove (52) accommodating a radially inner bead (32) of the rolling diaphragm (13), the rolling diaphragm is connected to the edge of the bead (32) located away from the (first) diaphragm disk (12). By connecting the rolling diaphragm (13) to the edge of the bead (32) located away from the (first) diaphragm disk (12), a pneumatic space (27) is defined by the rolling diaphragm (13) and the (first) diaphragm disk (12). Pressure occurring in the vacuum chamber(s) (28, 30) can be admitted to the pneumatic space (27).

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