Trap for the sump drain of an evaporative cooler

Gas and liquid contact apparatus – Contact devices – Porous mass

Patent

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Details

141329, 137797, B01F 304

Patent

active

046735372

ABSTRACT:
A trap device for placement on the overflow standpipe provided in the sump of an evaporative cooler for blocking the high velocity inflow of sewer gasses or other contaminants through the standpipe into the cooler during operation thereof without interfering with the water draining functions of the standpipe. The trap device is in the form of an inverted cupshaped body which is mountable in substantially concentric relationship with the standpipe and has a closed top which is spaced above the top of the standpipe and an open bottom end which is submerged in the operational water supply contained in the sump of the evaporative cooler. The closed top of the trap device is provided with a knock-out plug so that the drain hose of a bleed-off system may be sealingly inserted therein when the cooler is so equipped.

REFERENCES:
patent: 395313 (1889-01-01), Clouette
patent: 1489201 (1924-04-01), Freeze
patent: 2089231 (1937-08-01), Uline
patent: 2687829 (1954-08-01), Horrocks
patent: 3228665 (1966-01-01), Dolan
patent: 3470893 (1969-10-01), Nelson
patent: 4173858 (1979-11-01), Cassia
patent: 4192832 (1980-03-01), Goettl
patent: 4289713 (1981-09-01), Goettl
patent: 4573490 (1986-03-01), Kaletsky
patent: 4576013 (1986-03-01), Sperr et al.

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