Relay valve for a compressed-air system

US11174953B2 · kind B2 · utility

Assignee

• WABCO GmbH · DE

Inventors

• Karl-Heinz Riediger-Janisch · Hannover, DE
• Reiner Hölscher · Seelze, DE
• Gerhard Martini · Gehrden, DE

Key dates

• Filing date: Mar 20, 2019
• Grant date: Nov 16, 2021
• Expiry date: Mar 20, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B11/068
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A relay valve (1′) 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 (19). The relay piston (19) is axially movably guided and, at one axial end, has an annular, radially inner valve seat (20). A sealing piston (9) is axially movably guided coaxially with respect to the relay piston (19). The sealing piston (9) is pushed by a compression spring (8) toward the relay piston (19) and an annular, radially outer valve seat (25), which is a part of a seat ring (24) fastened in an annular collar (23) of the housing bottom part (2). The seat ring (24) is a deep-drawn component shaped as a cylindrical pot of a metallic material. The radially outer valve seat (25) is an axially protruding annular web with a gable-shaped axial cross section.