Bulk material container having a filter vent

Details Bulk material container having a filter vent Bulk material container having a filter vent

1988-02-12

1988-12-27

Norton, Donald F.

Receptacles

Closures

With condition responsive vent or valve

220372, B65D 5116

Patent

active

047935090

ABSTRACT:
A bulk material container with a vent. Disposed in the vent is a filter membrane. Under normal conditions, fluid in the container breathes with the air under atmospheric pressure through the filter membrane. In one embodiment, when the bulk material in the container is under excessive fluid pressure, the filter membrane is fractured for fluid under excessive pressure to vent rapidly to atmosphere. In another embodiment, when there is an excessive vacuum in the container, air under atmospheric pressure fractures the filter member for air atmospheric pressure to instantaneously enter the container through the fractured membrane to reduce the vacuum within the container.

REFERENCES:
patent: 1675503 (1928-07-01), McCallum
patent: 1815920 (1931-07-01), Lake
patent: 1921943 (1933-08-01), Rice et al.
patent: 2371296 (1945-03-01), Hopwood
patent: 2603308 (1952-07-01), McCall
patent: 2675093 (1954-04-01), McCall et al.
patent: 4413746 (1983-11-01), Matsutani

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