Check valve

US11092253B2 · kind B2 · utility

Assignee

• W.L. Gore & Associates GmbH · DE

Inventors

• Alexander Zaggl · Feldkirchen-Westerham, DE
• Michael Rittmann · Ditzingen, DE

Key dates

• Filing date: Aug 9, 2017
• Grant date: Aug 17, 2021
• Expiry date: Aug 9, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K17/0453
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A check valve (1) for a through hole in a compartment wall (100) comprises an elastic membrane (20) covering an open end (16) of a flow passage (14), a base (11) to which the elastic membrane (20) is fixed, and a protector (30) covering at least a portion of the elastic membrane (20), wherein the elastic membrane is fixed to the base in a state where it is elastically stretched over and forced against a sealing surface (17) surrounding the open end (16) so as to seal the flow passage (14). The elastic membrane lifts from the sealing surface when the pressure in the flow passage is high. The elastic membrane may be air- or gas-permeable and, preferably, waterproof so as to impart a low pressure venting functionality to the check valve.