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:
Mar. 16, 2021
Filed:
Aug. 30, 2018
Wabco Gmbh, Hannover, DE;
Julian Van Thiel, Burgwedel, DE;
WABCO GMBH, Hannover, DE;
Abstract
An electropneumatic parking brake module includes a supply port configured to connect a compressed air supply, a spring brake actuator port configured to connect at least one spring brake cylinder, and a trailer control port, an inlet-outlet valve unit configured to control a spring brake pressure, and an electropneumatic pilot control unit configured to control at least one control pressure at the inlet-outlet valve unit and configured to perform a trailer control position function. The electropneumatic pilot control unit includes a 3/3-way valve that has a first switching position in which the at least one control pressure is controlled, a second switching position in which the trailer control position function is carried out, and a third switching position in which the inlet-outlet valve unit and the trailer control port are connected to a vent.