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. 17, 2006
Filed:
Sep. 01, 2005
Albert D. Fisher, Kansas City, MO (US);
Albert D. Fisher, Kansas City, MO (US);
Haldex Brake Corporation, Kansas City, MO (US);
Abstract
An air-operated brake actuator system of a vehicle comprises a spring brake actuator and a service brake actuator, the spring brake actuator including a sealed housing with a spring chamber and a pressure chamber, and a hollow actuator rod disposed in the spring brake actuator and axially moveable for applying a parking brake, the service brake actuator including a service pressure chamber for applying a service brake, in which a control valve of the brake actuator system includes a valve body placeable within the hollow actuator rod, the valve body including an opening formed therein for allowing fluid communication between the spring chamber of the spring brake actuator and the service pressure chamber of the service brake actuator through the hollow actuator rod, the control valve including a membrane formed of an elastic material and having a breathing hole formed there-through, the membrane positioned within the opening of the valve body and configured to seal the opening except the breathing hole when the membrane is not subject to a fluid pressure beyond a threshold level.