Safety valve

US12404881B2 · kind B2 · utility

Assignee

• Aventics GmbH · DE

Inventors

• Heinz-Hermann Meyer · Seelze, DE
• Martin Pilcher · Hannover, DE

Key dates

• Filing date: Sep 12, 2022
• Grant date: Sep 2, 2025
• Expiry date: Sep 12, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/8757
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

For connecting high pressures and flows, a safety valve includes a first main stage which, in a rest position, connects a fluid outlet to a first relief outlet and, in a switched position, connects a fluid inlet to a fluid connection for a second main stage. The second main stage, in a rest position, connects the fluid outlet to a second relief outlet and, in a switched position, connects the fluid connection to a fluid outlet. Both main stages are configured as seat valves having multipart tappets and, when the first main stage is connected, a first tappet part that is actuated counter to a spring load, in a first movement portion, initially sealingly abuts a second tappet part, as a result of which a relief passage to the first relief outlet is closed.