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:
May. 19, 1987
Filed:
Dec. 07, 1984
Wabco Westinghouse, Hanover, DE;
Abstract
The invention relates to a load-controlled brake force controller system for a pneumatically operated brake for tractor and/or trailer vehicles. A housing includes a load-controlled brake pressure controller for regulating the control pressure released by a brake valve as a function of the load sustained by the vehicle. A relay valve connected in series relationship with the brake pressure controller to cause compressed air to be introduced to the brake from a reservoir when the brake valve is activated. The relay valve being activated by a relay piston which is pressurized toward an open direction of the relay valve by a modulated pressure and toward a closed direction of the relay valve by the braking pressure in an outlet chamber which is connected to the brakes and which can be connected by the relay valve to the reservoir. A graduated piston for providing a graduated increase of the brake pressure beyond the value corresponding to the current control ratio up to the available supply pressure and being adapted to go into operation at a predetermined control pressure.