Receptacles – Closures – Vent in closure
Patent
1992-01-15
1993-03-16
Shoap, Allan N.
Receptacles
Closures
Vent in closure
220202, 220367, 220373, 220745, 220DIG27, 55510, 55420, 137545, 137587, B65D 5116, B65D 9028, B01D 4624
Patent
active
051937093
ABSTRACT:
A filtered vent useful for venting drums, such as 55-gallon drums, includes a cylindrical housing having an anular activated carbon filter cartridge disposed therein. The cylindrical housing has a threaded collar with vents at one end and a pressure relief valve at the other end. The pressure relief valve is connected to a J-shaped tube which has an open end positioned proximate the threaded collar. An annular filter is disposed in the housing, the annular filter has an inner surface in communication with an inlet connected to the pressure relief valve and an outer surface in communication with the vents in the threaded collar. Volatile liquid in the air space between the top wall of the container and the top surface of the liquid passes through the activated carbon filter before venting into the atmosphere. If nesessary or desired, a HEPA filter may be disposed upstream of the activated carbon filter and a GORTEX.TM. film may be placed over the open end of the tube in order to protect the activated carbon filter from becoming contaminated with radioactive particulates or becoming degraded by the liquid.
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Caretto Vanessa
Shoap Allan N.
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