Patent ID: 7739757

Claim:
A base and drain assembly for a shower enclosure, comprising: a receptor base for mounting at least one upright wall of the shower enclosure, the receptor base having a floor, a drain well and a drain opening, the drain well being recessed into the floor at the drain opening and defining a drain well perimeter extending about the drain opening; and a drain cover mounted within the drain well above the drain opening in essentially flush relation with areas of the floor adjacent the drain well perimeter, the drain cover having a drain cover perimeter spaced from the drain well perimeter so as to define a peripheral passage therebetween for peripheral flow to the drain opening beneath the drain cover, the drain cover having at least one anti-vortex rib extending along an underside of the drain cover and toward the drain opening proximate the drain opening so as to disrupt a vortex in the water passing through the drain opening; wherein the at least one anti-vortex rib extends to a prescribed height above the drain opening.