Filter cartridge having internal liquid trap

Details Filter cartridge having internal liquid trap Filter cartridge having internal liquid trap

1991-09-04

1993-01-19

Dawson, Robert A.

Liquid purification or separation

With repair or assembling means

Hoist or handle means

210172, 210309, 210439, 210457, 210461, 210462, 210484, 2104932, B01D 2915

Patent

active

051804891

ABSTRACT:
A filter cartridge (10) for filtering liquid having an internal liquid trap (28). The cartridge (10) has a cylindrical housing (12) having a closed top end (14) and bottom end (16), and a side wall (30) which is perforated to allow liquid to pass through. A tube (22) extends from a liquid inlet (18) at the bottom end (16) of the housing toward the top end (14), where the tube (22) is open to allow the liquid to flow into the housing (12). The cartridge (10) includes a filter media (26) inside the housing spaced apart from the conduit (22) so that the filter media (26), the bottom end (16) and the length of the conduit (22) below where the conduit is open form a trap (28). This trap catches liquid flowing into the housing (12) through the conduit (22) whereby the liquid may escape the cartridge (10) only through the filter media (26) thereby preventing back flow through the conduit (22).

REFERENCES:
patent: 2468862 (1949-05-01), Briggs
patent: 3246765 (1966-04-01), Murphy et al.
patent: 3397793 (1968-08-01), MacDonnell
patent: 4878930 (1989-11-01), Manniso
patent: 5085769 (1992-02-01), Klausen

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