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:
Feb. 24, 2004
Filed:
Apr. 04, 2002
Craig Hammann Stephan, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A brake fluid pressure relief assembly ( ) for a brake system ( ) including a pedal assembly ( ) employs first and second valves ( ) to provide controlled collapse of a brake pedal pad ( ) when both a predetermined deceleration limit is exceeded and a predetermined pressure level is exceeded in a hydraulic brake fluid. The first valve ( ) is actuated by an inertial mass ( ) acting against a first spring ( ). With the first valve in the open position, hydraulic fluid passes into a reservoir ( ) whose volume is a dependent on the position of the second valve ( ). The second valve ( ) opens when the fluid pressure in the reservoir exceeds a predetermined pressure limit and compresses a piston ( ) against a second spring ( ). Accordingly, the forces that can be communicated through the pedal system are reduced during a collision.