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1. (WO2017148754) RELIEF VALVE FOR A FOOD PACK, AND FOOD PACK

Pub. No.:    WO/2017/148754    International Application No.:    PCT/EP2017/053975
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Feb 23 00:59:59 CET 2017
IPC: B65D 77/22
F16K 15/14
Applicants: BRINKE, Volker
Inventors: BRINKE, Tobias
Title: RELIEF VALVE FOR A FOOD PACK, AND FOOD PACK
Abstract:
The invention relates to a relief valve (1) for a food pack (VP), wherein the relief valve (1) comprises a valve body (2) with an outlet opening (21) and with a relief opening (22) provided in the valve body (2), such that, in the operational state of the relief valve (1), a pressure difference (ΔP) directed from the outlet opening (21) to the relief opening (22) can be set, and a fixing element (3, 31) is provided on the valve body (2), and interacts with the valve body (2) by way of a sealing means, such that, in all intended operational states of the relief valve, a flow of a surroundings fluid (UF) from the outlet opening (21) to the relief opening (22) is prevented, aside from inevitable diffusion phenomena. In the presence of a pressure difference (ΔP) greater than a predefinable negative limit pressure difference, the sealing means sealingly interacts with the valve body (2) in a blocking state of the relief valve (1), such that a relief flow (ES) of an operating fluid (BF) present at the relief opening (22) from the relief opening (22) to the outlet opening (21) of the valve body (2) is prevented, and in the presence of a pressure difference (ΔP) smaller than the negative limit pressure difference, the relief flow (ES) of the operating fluid (BF) from the relief opening (22) to the outlet opening (21) is permitted. According to the invention, the sealing means is designed as a sealing plate (4), and is manufactured from a plastics and/or elastic material, such that a sealing surface (41) of the sealing plate (4) interacts by way of a predefinable adhesion force with a valve base surface (201) of a valve base (20) of the valve body (2) such that the negative limit pressure difference has a value between -0.5 mbar and -20 mbar, wherein the sealing means does not comprise a fluid sealing means. The invention also relates to a food pack (VP) having a relief valve (1).