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. 05, 2014
Filed:
Jul. 04, 2007
Uwe Bensch, Hannover, DE;
Jörg Helmer, Vogt, DE;
Reiner Hölscher, Seelze, DE;
Bernd-joachim Kiel, Wunstorf, DE;
Wilfried Menze, Springe, DE;
Juan Rovira-rifaterra, Garbsen, DE;
Uwe Bensch, Hannover, DE;
Jörg Helmer, Vogt, DE;
Reiner Hölscher, Seelze, DE;
Bernd-Joachim Kiel, Wunstorf, DE;
Wilfried Menze, Springe, DE;
Juan Rovira-Rifaterra, Garbsen, DE;
WABCO GmbH, Hannover, DE;
Abstract
A valve unit for an electro-pneumatic brake control is connected to an input of an air-quantity-boosting valve for the aeration/venting thereof. A double-armature solenoid valve includes primary and secondary armatures each spring-loaded and actuated by a common magnet coil. The primary armature is a switch for a vent valve; the secondary armature is a switch for an intake valve. When the coil is not drawing current, the armatures are in spring-loaded position, the intake valve blocking intake and the vent valve venting. When a first current flows through the coil, the primary armature enters switching position, with the secondary armature in spring-loaded position; the intake valve blocking intake and the vent valve blocking venting. When a second current greater than the first flows through the coil, both primary and secondary armatures are moved into switching positions, so that the intake valve admits air and the vent valve blocks venting.