Pressure vent for explosion-proof electrical enclosures

Details Pressure vent for explosion-proof electrical enclosures Pressure vent for explosion-proof electrical enclosures

1979-04-04

1979-12-25

Lowrance, George E.

Receptacles

Container attachment or adjunct

Fire prevention

227 88R, 220231, 227334, 227337, F16K 1712, B65D 2500

Patent

active

041801776

ABSTRACT:
A vent device for relieving pressure buildup inside an electrical enclosure due to an internal explosion of gases. A mass of stainless steel foam covers an opening in the enclosure and stops any flames or particles from escaping but provides a large equivalent cross section opening to permit the gases to escape and vent the pressure buildup. An outer cover protects the foam mass from impact damage and shields it from high pressure water spray used in cleaning. The cover is vertically hung from a knife-edge and held closed by means of a permanent magnet. A predetermined pressure differential is sufficient to overcome the attractive force of the magnet and allow the protective cover to be pushed open.

REFERENCES:
patent: 2151180 (1939-03-01), Anschicks
patent: 3095965 (1963-07-01), Stahl
patent: 3307303 (1967-03-01), Bloxsom
patent: 3468576 (1969-09-01), Beyer
patent: 3502047 (1970-03-01), Crosbie

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