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:
Oct. 09, 2012
Filed:
Jul. 22, 2008
Henning Förster, Nordstemmen, DE;
Jörg Helmer, Vogt, DE;
Wolfgang Strache, Hemmingen, DE;
WABCO GmbH, Hannover, DE;
Abstract
An electropneumatic parking brake modulator for controlling a parking brake mode of trailer brakes in a vehicle/trailer combination includes a valve element for airing and bleeding the trailer spring brake cylinders, at least one compressed air reservoir inlet for airing at least one compressed air line in the parking brake modulator with compressed air from a compressed air reservoir of the towing vehicle, at least one compressed air reservoir outlet at which a reservoir pressure can be made available for the brakes of the trailer, and at least one compressed air control outlet at which a control pressure can be made available for the brakes of the trailer. A towing vehicle protection valve is integrated into the parking brake modulator, and a compressed air line to the compressed air control outlet is automatically blockable when the reservoir pressure made available for the trailer falls below a predetermined threshold value.