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:
Apr. 09, 2002
Filed:
Jun. 15, 2000
Georg Sulzyc, Eppelheim, DE;
Haldex Brake Products GmbH, Heidelberg, DE;
Abstract
A trailer brake valve ( ) is to be mounted in a compressed air brake system of a trailer of a truck. The brake system of the trailer includes an anti lock control unit and a load sensing control unit. The trailer brake valve ( ) includes a housing ( ), a relay piston ( ) being movably guided in the housing ( ) and a control chamber ( ). A brake chamber ( ) includes connections ( ) for conduits leading to brake cylinders ( ) of the brake system. The control chamber ( ) and the brake chamber ( ) are defined by the relay piston ( ). A brake conduit ( ) is connected to the control chamber ( ). A reservoir chamber ( ) and an outlet valve ( ) are located in the housing ( ) and an inlet valve ( ) is located adjacent the reservoir chamber ( ). A first solenoid valve ( ) is arranged in the brake conduit ( ) and a second solenoid valve ( ) is designed and arranged to deaerate the control chamber ( ). A first pressure/voltage converter ( ) senses control pressure prevailing in the control conduit ( ) and a second pressure/voltage ( ) converter senses pressure prevailing in a region adjacent the relay piston ( ). A load sensing control unit ( ) is designed and arranged to produce a load signal and an independent electronic control ( ) unit is designed and arranged to control the first and second solenoid valve ( ) exclusively with the load signal produced by the load sensing control unit ( ).