Patent ID: 8628657

Claim:
A tamper resistant strainer assembly for use in floor drains or indirect waste receptors having a well formed by a side wall and a floor plate and provided with a discharge tube extending downward from the floor plate and attachable to a drain pipe of a building drain system wherein the discharge tube having an interior wall surface forming a discharge passageway through which material collected in the well can pass, comprising: a. an expandable gasket member having a body section formed by a wall and sized to fit into the discharge tube or the drain pipe, the wall of the body section having an interior wall surface forming a passageway, the interior wall surface having a threaded section; b. a rigid support structure having a side wall provided with exterior threads sized to operative mate with the threaded section of the gasket member interior side wall, the rigid support structure constructed having sufficient rigidity and sized to expand the expandable gasket member into sealing contact against the inside wall surface of the floor sink discharge tube or drain pipe; the rigid support member having at least one support spoke extending between the interior side walls of the rigid support member, the at least one support spoke having a center section provided with a vertically oriented opening; c. a strainer member having a top surface section provided with a screw opening, and d. an elongated screw having a tamper resistant head at a first end of the elongated screw and sized to seat in the screw opening; the elongated screw having a threaded section at an opposite end of the elongated screw, the elongated screw being of sufficient length to extend through the screw opening and operatively engage the vertically oriented opening to affix the strainer member to the support member.