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. 14, 1990
Filed:
May. 09, 1988
Applicant:
Inventor:
Peter Reinhardt, Lohr, DE;
Assignee:
Mannesmann Rexroth GmbH, Lahr Postfach, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
With the invention a supply voltage and a control signal are to be supplied via a two-conductor cable to the power stage of a solenoid valve. For this purpose pulse-width modulation is employed, i.e. in a microcomputer the adjusting signal is converted directly as pulse-width-modulated signal via a power stage to an AC voltage. The control signal is obtained from the pulse width in the power stage.