Patent ID: 8747665

Claim:
A filter container for a filter element, the filter container comprising: a one-piece container wall having a non-constant thickness defining a mouth and a cavity for receiving the filter element, wherein an inner wall surface of the one-piece container wall defines: an inlet seal arranged at a distance away from the mouth, a threaded portion extending between the mouth and the inlet seal, and one or more filter retaining elements extending from the inner wall surface at a distance below the inlet seal that is arranged below the threaded surface and the mouth, wherein the one or more filter retaining elements are arranged inside the cavity, wherein the one or more filter retaining elements each comprise: a shoulder extending radially inward from the inner wall surface toward a central axis defined by the filter container, the shoulder having a shoulder wall surface substantially concentric with the inner wall surface and a ledge surface substantially perpendicular to the inner wall surface for supporting a received filter element; and a nose extending radially inward from the inner wall surface and spaced from the shoulder along the central axis toward the mouth, the nose having a ramp surface extending at an angle from the inner wall surface away from the mouth and a retaining surface facing opposite of the ledge surface of the shoulder; wherein the ramp surface extends radially inward from the inner wall surface to a first radial distance and the shoulder wall surface is disposed radially inward from the inner wall surface at a second radial distance, the first radial distance greater than or equal to the second radial distance.