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:
Dec. 02, 1980
Filed:
Mar. 01, 1979
Lucas H Haar, Niddatal, DE;
Ernst-Dieter Schafer, Bad Nauheim, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
A brake-force regulator for dual-circuit brake systems including first and second stepped pistons disposed in a multiple-step housing bore such that the end of the smaller diameter portion of both the first and second piston abut one another. An inlet chamber coupled to the master cylinder is provided adjacent the annular surface between the larger diameter portion and the smaller diameter portion of each of the first and second pistons. A first output chamber coupled to one of the brake circuits is provided adjacent the end of the larger diameter portion of the first piston and a second output chamber coupled to the other brake circuit is provided adjacent the end of the larger diameter portion of the second piston. A first valve is associated with the first piston to couple the associated one of the inlet chambers to the first outlet chamber and a second valve is associated with the second piston to couple the associated one of the inlet chambers to the second outlet chamber. A spring is provided to urge the first piston against the second piston and a stop is provided for the second piston such that when the second piston is against the stop the second valve is kept open. Two different embodiments are disclosed in which the first valve is a deceleration-responsive valve and the second valve is a pressure-responsive valve and a third embodiment is disclosed in which both the first and second valves are pressure-responsive valves.