Patent ID: 8002981

Claim:
A filter housing comprising: a housing body having a side wall and an end wall defining a filter cartridge space, the end wall forming a closed end of the filter cartridge space, and the body having an open end opposite the end wall; a standpipe secured to the end wall and extending into the filter cartridge space from the closed end toward the open end, the standpipe including an internal flow passage, and at least one opening in the standpipe that places the internal flow passage in communication with the filter cartridge space; and a sleeve surrounding at least a portion of the standpipe, the sleeve including at least one opening through the sleeve, the sleeve is slideably disposed on the standpipe for movement between a first position where the sleeve covers the standpipe opening and a second position where the sleeve opening is at least partially aligned with the standpipe opening, the sleeve includes a plurality of resilient fingers that are deflectable radially outward away from a longitudinal axis of the standpipe and from a locked position to an unlocked position; when the resilient fingers are at the locked position, the fingers are engaged with the standpipe to retain the sleeve at the first position; and when the resilient fingers are at the unlocked position, movement of the sleeve to the second position is permitted, a filter cartridge having an endplate with a projecting portion, each finger has an angled actuation surface that faces generally inward toward a longitudinal axis of the standpipe and generally upward toward the open end of the housing body, the angled actuation surfaces configured to guide the projecting portion of the endplate of the filter cartridge to actuate the fingers from the locked position to the unlocked position.