Pressure vessel having a plurality of filtering elements

Claim 1

In a filter of the type comprising: a housing having side and bottom walls and a top wall spaced from said bottom wall, said housing having a liquid outlet, sid housing top wall having at least two spaced openings formed therein; removable, bag-shaped filtering means for straining a liquid having an open upper end fitted into each top wall opening, each filtering means being supported by said top wall at its open end and projecting into the interior of said housing below said top wall; a removable cover enclosing said filter housing, the interior of said cover defining a flow passage communicating with each filtering means open end; and a liquid inlet in communication with said interior of said cover, the improvement comprising: hold-down means pivotally carried by said housing top wall and movable between a first lowered position wherein said hold-down means overlays a portion of each filtering means to retain said filtering means within said housing top wall openings and a second raised position subsequent to the removal of said cover from said housing wherein said hold-down means is pivoted with respect to said housing top wall to a position spaced from said filtering means to effect removal of said filtering means; the hold-down means including: a ring member pivotally mounted to said top wall such that said ring member may be pivoted with respect to said top wall from said first lowered position to said second raised position, said ring member overlaying said filtering means when in said second lowered position; and clamping means secured to said top wall for clamping a portion of said ring member to said top wall at a point angularly spaced from the point of pivotable movement for said ring member when said ring member is in said second lowered position.