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:
Feb. 26, 2013
Filed:
Nov. 18, 2008
Applicants:
Ansgar Fries, Munich, DE;
Eduard Hilberer, Hockenheim, DE;
Inventors:
Ansgar Fries, Munich, DE;
Eduard Hilberer, Hockenheim, DE;
Assignee:
KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 49/02 (2006.01); F16K 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A compressed air supply system for a utility vehicle includes a compressor that can be driven by a drive by a pneumatic clutch, and a valve having a magnetic coil for selectively supplying compressed air to a coupling inlet of the clutch. When the valve is opened or maintained open, a pick-up current flows through the magnetic coil during a first phase, and a holding current weaker than the pick-up current flows through the magnetic coil during a second phase, a driver signal generating the holding current being pulse-width-modulated in the second phase.