Plastic fluid filter and method for assembling same

Details Plastic fluid filter and method for assembling same Plastic fluid filter and method for assembling same

1995-04-13

1997-09-16

Walker, W. L.

Liquid purification or separation

With repair or assembling means

210446, 210443, 210444, 210450, 210451, B01D 2708

Patent

active

056676786

ABSTRACT:
A one-piece plastic injection molded filter housing having first and second open ends, the first end being threaded to receive a separate water collection bowl, and the second end including an external annular recess. An injection molded end plate member includes a circumferential annular flange with an interior annular rib formed thereon, and an inward annular projection with an external thread formed thereon. Opposing, one-piece plastic upper and lower end caps include spaced flanges to receive the respective ends of a filter media therebetween. The upper end cap also includes an upper annular projection that has an internal thread. A hollow plastic molded center tube is used inside a cylindrical paper media. The upper end cap is screwed into the end plate member via the corresponding threads. The rib has an inner diameter less than the outer diameter of the second end of the housing. Adhesive is applied to the rib and the end plate member is connected to the housing, so that the rib fits into the recess on the housing via an interference fit. The method for manufacturing the filter includes the following steps: forming the cylindrical paper media; inserting a plastic center tube into the cylindrical media and connecting the plastic upper and lower end caps to the media and center tube combination to form a media element; screwing the upper end cap onto the end plate member; and connecting the end plate member to the second end of the housing, so that the rib and recess cooperate to fix the end cap member on the housing via an interference fit.

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