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:
Sep. 06, 2011
Filed:
Nov. 11, 2005
Oliver Brandt, Braunschweig, DE;
Wilfried Matthias, Bad Nenndorf, DE;
Andreas Richter, Wedemark, DE;
Oliver Brandt, Braunschweig, DE;
Wilfried Matthias, Bad Nenndorf, DE;
Andreas Richter, Wedemark, DE;
WABCO GmbH, Hannover, DE;
Abstract
A ventilation device provided which includes a valve arranged in a combined spring accumulator and operating brake cylinder. On depressurization of a pressure medium chamber in the spring accumulator brake cylinder, ventilation of a spring accumulator chamber of the spring accumulator brake cylinder, from the pressure medium chamber of the operating brake cylinder, is effected. A chambers is provided on the side of a valve piston in the valve, facing away from a control chamber, which, with an open valve, connects a first working connections to this chamber and, hence, to a second working connection, arranged axially on the front side of the valve, by means of a passage provided in the valve piston.