Patent ID: 8561808

Claim:
A filter assembly comprising: a filter housing into which a filter element is insertable; a filter head attachable to said filter housing, the filter head comprising: an inlet port in fluid communication with a first side of the filter element; and an outlet port in fluid communication with a second side of the filter element; a core element extending within the filter housing and covering the second side of the filter element; and a leaf spring that is insertable into the filter housing; wherein the filter assembly further comprises a coupling assembly for coupling the core element to the filter housing, wherein the coupling assembly is insertable into the filter housing, the coupling assembly comprising said leaf spring and a connecting part for connecting the core element to the coupling assembly; and wherein the leaf spring, prior to insertion, has a span larger than an internal diameter of the filter housing, such that when the leaf spring is inserted into the filter housing an outer edge of the leaf spring engages an inner surface of the filter housing and the leaf spring resiliently deforms to bulge in the direction of insertion of the leaf spring into the filter housing, thereby preventing removal of the leaf spring, in a direction opposite to the direction of insertion of the leaf spring, from the filter housing due to urging the outer edge of the leaf spring against the inner surface of the filter housing.