Patent ID: 6863184
Filing Date: 2005-03-08
Classification: B01D

Abstract:
1. A filtration apparatus comprising: a housing head having an inlet and an outlet; a housing bowl detachably attached to said housing head and surrounding a cartridge filter to define a channel wall; and a releasable clamping device that exerts a force to press said housing head and said housing bowl against each other to clamp said housing head and said housing bowl together, wherein: said housing head has a ring-shaped first sealing portion that faces said housing bowl; said housing bowl has a ring-shaped second sealing portion that abuts directly against said first sealing portion when said clamping device exerts said force to press said housing head and said housing bowl against each other; one of said first and second sealing portions is a protrusion and another of said first and second sealing portions is a recess; with respect to an axial section along a cylindrical axis line of said housing head and said housing bowl, said protrusion has a radially inner convex arcuate curved protrusion surface and a radially outer convex arcuate curved protrusion surface; said recess is bounded by a radially inner recess wall portion and a radially outer recess wall portion; said radially inner convex arcuate curved protrusion surface presses against said radially inner recess wall portion to form a first inner circular seal, and said radially outer convex arcuate curved protrusion surface presses against said radially outer recess wall portion to form a second outer circular seal, wherein said circular seals are formed at locations within a depth of said recess displaced away from terminal outer free edges of said recess wall portions; and wherein said radially inner recess wall portion and said radially outer recess wall portion each have a concave arcuate curved shape with respect to said axial section.