Patent · US Expired

Pressure control valve for slip-controlled hydraulic brake systems

US5390993A · kind A · utility

5Cited by

9References

3Claims

0Family size

Inventors

Erhard Beck · Darmstadt, DE
Anton David · Dreieich, DE
Helmut Weisbrod · Bad Nauheim, DE
Horst Kornemann · Frankfurt am Main, DE

Key dates

Filing date	Nov 1, 1993
Grant date	Feb 21, 1995
Priority date	—
Expiry date	Nov 1, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/785
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A pressure control valve is disclosed comprising a valve tappet (1) guided in a valve housing (3) and accommodating a compression spring (4), with a valve closure member (10) on one end of the valve tappet (1) and mating with a valve seat (9) establishing a connection between a pressure supply port (11) that emanates from a pressure fluid source and a pressure return channels (12) once the pressure attains a specific preset desired valve. In order to diminish noise, at least one friction element (2) is in engagement with the valve tappet (1) movable to abut on radial friction surfaces of the valve housing (3) and/or the valve tappet (1).

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