Patent ID: 7556155

Claim:
A fluid filter arrangement comprising: (a) a housing having a wall defining a closed end, an open end, an interior volume, and an inwardly extending ledge; (i) the housing including a threaded region adjacent to the open end; (ii) the inwardly extending ledge being circumferential and extending completely along an internal surface of the housing wall; (A) the inwardly extending ledge being located between the closed end and the threaded region; (b) a filter cartridge oriented within said interior volume of said housing; said filter cartridge including a tubular construction of filter media defining an open filter interior; (i) said tubular construction of filter media having a first end; (ii) said filter cartridge includes an end cap secured to said first end of said tubular construction of filter media; said end cap defining an aperture in fluid communication with said open filter interior; (c) a projection arrangement constructed and arranged to space said filter cartridge from said housing wall to define a fluid flowpath between said filter cartridge and said housing wall; (i) the projection arrangement includes a base and a sidewall; (ii) said projection arrangement comprising at least one projection in extension from at least one of said base and said sidewall; (iii) the projection arrangement engaging the inwardly extending ledge to space said filter cartridge from said housing wall to define a fluid flowpath between said filter cartridge and said housing wall; (d) wherein a portion of the housing wall adjacent to the filter media defines an internal diameter about equal to an internal diameter of the housing wall between the threaded section and the internally extending ledge; (i) between the internally extending ledge and the portion is a region of the housing wall having an internal diameter greater than the internal diameter of the portion to form a relief; (A) the relief allowing the projection arrangement to spring back to a normal position.