Patent ID: 9345995
Filing Date: 2016-05-24
CPC Classification: B01D,C02F,F16K,Y10T

Claim Text:
1. A filter cartridge comprising: a sump; a stepped inlet/outlet having a first portion extending from one end of the sump having an outside diameter that is smaller than an outside diameter of the sump, and having a second portion extending from the first portion having an outside diameter that is smaller than the outside diameter of the first portion, the stepped inlet/outlet comprising an inlet port in the first portion circumferentially surrounding the second portion having an outlet port aligned with a central axis of the filter cartridge; a first lug on the first portion protruding outwardly from a surface of the first portion in a radial direction perpendicular to the central axis; a shoulder surface that is formed by the intersection of the sump and the stepped inlet/outlet; a filter disposed within the sump; and the first lug comprising a curved surface facing the shoulder surface and curving away from the shoulder surface such that a distance between the curved surface and the shoulder surface varies and wherein a minimum distance between the curved surface and the shoulder surface is located in a plane intersecting with the central axis and bisecting the first lug into two halves.