Patent · US Expired

Pressure differential valve

US4838305A · kind A · utility

9Cited by

5References

4Claims

0Family size

Assignee

Alfred Teves GmbH · DE

Inventors

Hans-Dieter Reinartz · Frankfurt am Main, DE
Helmut Steffes · Hattersheim, DE
Edwin Czarnetzki · Elz, DE

Key dates

Filing date	Dec 3, 1987
Grant date	Jun 13, 1989
Priority date	—
Expiry date	Dec 3, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7796
WIPO fieldControl
WIPO sectorInstruments

Abstract

A pressure differential valve, in particular for pressure fluid-actuatable motor vehicle brake systems, is disclosed and comprises a housing having a valve arrangement which is loaded by a preload force and which governs a connection between an inlet and an outlet. The preload force determines the gradient of pressure between the inlet pressure and the outlet pressure of the valve. In order to create a pressure differential valve which can be easily mounted and responds quickly at a low change-over pressure, the valve arrangement is actuatable by a tappet which is movable in dependence on the position of a diaphragm.

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