Patent ID: 7150576

Claim:
A drain strainer system comprising: a drain plate, a sleeve and a basket, coaxially mountable in a generally cylindrical drain pipe; the basket having a generally cylindrical wall terminating in a closed bottom with a plurality of drain water flow openings disposed circumferentially in a region in the cylindrical wall, said flow openings region having an upper and lower extent at predetermined distance above the closed bottom; the basket having a diameter smaller that the drain pipe sufficient for drain water flow traversing the flow openings to freely traverse the openings and flow through the drain pipe; the sleeve having a generally closed cylindrical sidewall and an open bottom coaxially disposed within the basket, the sleeve having a predetermined axial length relative to the basket so as to terminate with the opening a predetermined distance above the bottom of the basket, sufficient to permit drain water flow to pool to a depth of at least the lower level of the flow openings in the basket before traversing the flow openings and entering the drainpipe; The sleeve cylindrical sidewall further having a predetermined outside diameter with respect to the inside diameter of the basket wall; and the drain plate coaxially disposed over the basket and sleeve and having drain holes therein and a diameter larger than the basket and the sleeve so as to direct all drain water flow through the sleeve and basket.