Patent · US Expired

Electromagnetically actuatable valve

US4527744A · kind A · utility

15Cited by

4References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Udo Hafner · Munich, DE
Rudolf Krauss · Stuttgart, DE
Werner Langer · Ludwigsburg, DE

Key dates

Filing date	Jul 28, 1983
Grant date	Jul 9, 1985
Priority date	—
Expiry date	Jul 28, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S239/90
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An electromagnetically actuatable valve which serves to control a flow of fluid. The valve includes a valve housing and a core of ferromagnetic material, as well as an armature which actuates a valve element cooperating with a fixed valve seat. When the magnetic coil is excited, the armature is attracted toward a stop face on the valve housing and is in contact there with an effective zone on the armature. The armature and the valve housing are formed of low-carbon steel, and both the stop face and at least the outer effective zone of the armature are provided with wear-resistant surfaces. The wear-resistant surfaces may be attained by nickel plating or by nitration.

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