Strainer assembly for bathtub drains and the like

The combination of a fluid compartment having a bottom with a waste water strainer assembly mounted in a circular drain opening in the bottom and wherein a horizontal flange on the bottom extends around the circular drain opening, comprising,

• a two piece strainer assembly having a circular horizontal flange with a center opening extending over the drain opening with the circular horizontal flange extending over the horizontal flange on the bottom which extends around the drain opening,
• the strainer assembly including a hollow bushing extension extending downwardly from the horizontal flange of the strainer assembly through the circular drain opening on the bottom,
• a hollow attachment bushing having a center opening threadably secured around a lower portion of the bushing extension and extending downwardly therefrom, and at least one crossbar extending thereacross,
• a bearing hub formed in the center of said crossbar on the center axis of said center openings, and
• a vertically disposed threaded aperture in said hub to threadably receive a threaded connecting stud of a closure valve,
• threads on the interior upper end of the attachment bushing threadably engaging threads on the lower portion of the hollow bushing to permit the upper end of the attachment bushing to engage directly a lower portion of the circular horizontal flange on the bottom to be tightly bound between the upper end of the attached bushing and a lower surface of the circular horizontal flange of the strainer assembly.