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. 12, 2000
Filed:
Feb. 12, 1999
Joachim Feldmann, Neustadt, DE;
WABCO GmbH, Hannover, DE;
Abstract
A valve arrangement includes a pressure medium inlet chamber, a pressure medium outlet chamber connected to a consumer, for example, a brake cylinder, and a pressure medium exhaust leading to a pressure medium sink. The pressure medium inlet chamber is connected to a pressure medium source. The pressure medium outlet chamber can be connected by operation of a controllable inlet valve to the pressure medium inlet chamber and by a controllable exhaust valve to a pressure medium sink. The actuating force requirement is small because the pressure force on the active surface of the graduating piston is absorbed by the regulating spring. As a result, the actuating force requirement of such arrangement is very low by comparison with the actuating force requirement of heretofore known arrangements. This feature permits facilitated selection of an actuating force requirement by placement of a spring which acts in opposition to an operating element of the arrangement. The invention finds particular significance in applications directed to vehicle braking systems.