The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1996
Filed:
Aug. 12, 1994
Werner Brehm, Hemmingen, DE;
Horst Keuerleber, Eberdingen, DE;
Georg Koepff, Hemmingen, DE;
Markus Deeg, Schwieberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
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.