Patent ID: 8511481

Claim:
A liquid filter comprising: a filter housing having a fluid inlet port, a filter fluid outlet port, a discharge hole, said filter housing comprising a housing base; and a house cover removable from said housing base; a tubular filter element having an axially aligned cavity and arranged within the filter housing, said filter element having a clean side and a contaminated side, said filter element comprising a filter media; an upper end plate secured to one end face of said media; and a lower end plate secured to an opposing end face of said media; and a standpipe arranged in said axially aligned cavity within the filter element, wherein the standpipe is sealed tightly to the filter element, a gasket arranged on said standpipe and sealably closing said discharge hole of said housing, wherein upon removal of said standpipe from said housing, said gasket uncovers said discharge hole draining residual fluid from said housing, and wherein said gasket seals between said standpipe and filter housing, said gasket sealing said clean side from said contaminated side, wherein said stand pipe includes a receiving area that is enlarged outward in a radial direction from said stand pipe, said receiving area including a first side onto which said gasket is arranged, said gasket facing on said first side facing said discharge hole, an axially opposing second side onto which said lower end plate is received, a coil spring supported on a inner surface of said housing cover, said coil spring applying a compressing force onto said stand pipe, pressing the gasket against said housing with an compression force aligned axially with the stand pipe, wherein said spring applies said pressing force onto said stand pipe and not to said filter element.