Patent · US Expired

Dual-circuit pressure control valves

US4392691A · kind A · utility

1Cited by

5References

21Claims

0Family size

Assignee

ITT Industries · US

Inventors

Bernd Schopper · Frankfurt, DE
Derek Lowe · Königstein, DE
Hans-Dieter Reinartz · Frankfurt am Main, DE
Peter Tandler · Rockenhausen, DE

Key dates

Filing date	Dec 30, 1980
Grant date	Jul 12, 1983
Priority date	—
Expiry date	Dec 30, 2000

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T11/34
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

In a known dual-circuit braking pressure control valve, a tilting lever arrangement is provided for distribution of the preloading force to the two control pistons, whereby the change-over point of the intact brake circuit is increased upon failure of one brake circuit. The tilting lever arrangement is complicated with respect to its construction and assembly, and its mode of operation is not safe. According to the present invention the tilting lever arrangement is replaced by a carrier bridge at the ends of the two pistons which synchronizes the points of application of the preloading forces by allowing a slight relative movement betweeen the two pistons when both of the brake circuits are operative.

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