US Patent 9848742 Level entry shower system

Providing an easy to install shower tray and drain assembly. The tray comprises a stepped upper surface and a receptor having at least one step for receiving the drain assembly. In certain embodiments, the drain assembly comprises a cup for securing the drain assembly to the receptor and to a drainage pipe, a clamping flange for securing a waterproof floor covering between itself and the cup, at least one seal for providing a watertight seal between the clamping flange and cup. The drain assembly may further comprise a grate, a grate retainer, and an adjuster for adjustably securing the grate retainer to the clamping flange.