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:
Jun. 18, 1991
Filed:
Apr. 23, 1990
Applicant:
Inventor:
Herbert Lembke, Lohr, DE;
Assignee:
Mannesmann Rexroth GmbH, Lohr, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
137 82 ; 335229 ; 335276 ;
Abstract
A control motor for a servo valve which includes pole screws defining an armature space, first and second coils supported by the pole screws, respectively, a soft metal armature which is resiliently mounted to a thin walled tube and a permanent magnet which polarizes the armature. An annular body carrying said pole screws and providing for a magnetic path between the pole screws and the permanent magnet.