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:
Nov. 16, 2021
Filed:
Mar. 20, 2019
Wabco Gmbh, Hannover, DE;
Karl-Heinz Riediger-Janisch, Hannover, DE;
Reiner Hölscher, Seelze, DE;
Gerhard Martini, Gehrden, DE;
WABCO GmbH, Hannover, DE;
Abstract
A relay valve (') for a compressed-air system of a vehicle has a working pressure inlet, a working pressure outlet, a venting outlet and a controllable relay piston (). The relay piston () is axially movably guided and, at one axial end, has an annular, radially inner valve seat (). A sealing piston () is axially movably guided coaxially with respect to the relay piston (). The sealing piston () is pushed by a compression spring () toward the relay piston () and an annular, radially outer valve seat (), which is a part of a seat ring () fastened in an annular collar () of the housing bottom part (). The seat ring () is a deep-drawn component shaped as a cylindrical pot of a metallic material. The radially outer valve seat () is an axially protruding annular web with a gable-shaped axial cross section.