Patent · US Expired

Pneumatic brake power booster with control housing having an electromagnetically operable control valve

US6209967A · kind A · utility

4Cited by

3References

5Claims

0Family size

Assignee

ITT MANUFACTURING ENTERPRISES LLC · US

Inventors

Horst Krämer · Ginsheim-Gustavsburg, DE
Jose Gonzales · Idstein, DE
Michael Vogt · Frankfurt am Main, DE
Peter Drott · Frankfurt am Main, DE
Uwe Kley · Frankfurt am Main, DE

Key dates

Filing date	Feb 27, 1998
Grant date	Apr 3, 2001
Priority date	—
Expiry date	Feb 27, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T13/72
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A brake power booster for automotive vehicles includes a control valve that is operable by an electromagnet irrespective of an actuating rod displacing a valve piston, the electromagnet actuating a third sealing seat which permits ventilation of the working chamber. The valve member of the control valve has passages which allow a pneumatic pressure compensation. To eliminate a pneumatic force component which counteracts the force generated by the electromagnet, the passages are provided radially outside the area delimited by the electromagnetically operable sealing seat on the sealing surface of the valve member.

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