Patent · US Expired

Electromagnetically operated proportional valve

US5547165A · kind A · utility

37Cited by

8References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Werner Brehm · Hemmingen, DE
Horst Keuerleber · Eberdingen, DE
Georg Koepff · Lambach, DE
Markus Deeg · Eberdingen, DE

Key dates

Filing date	Aug 12, 1994
Grant date	Aug 20, 1996
Priority date	—
Expiry date	Aug 12, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/1692
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetically operated proportional valve, in particular a pressure regulating valve for automatic transmission of motor vehicles has a magnet housing, a magnet coil and stationary flux guiding elements received in the magnet housing, a magnet armature, a valve member with which the magnet armature cooperates, stationary structural elements forming at least one auxiliary air gap and a working air gap in a magnetic circuit, the valve member cooperating with the stationary structural elements through the at least one auxiliary air gap and the at least one working air gap, at least one of the structural elements cooperating in the working air gap being at least partially provided on at least one surface facing a corresponding another structural element with at least one nonmagnetic coating.

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