Self sealing domed sewer cover assembly

Claim 1

A self sealing sewer cover assembly for preventing gases from escaping from a sewer inlet level with the ground comprising: a. insert means having a top end and a bottom end for connection to a sewer inlet having generally vertical interior walls, said insert means having generally vertical walls on the exterior thereof for parallel alignment with said generally vertical interior walls of said sewer inlet, b. trough means connected to said bottom end of said insert means and extending completely around the interior of said generally vertical walls of said insert means for containing water, said trough means having an inner generally vertical wall defining an opening through which water overflowing from said trough means can flow, said inner generally vertical wall of said trough means having a height extending to the level of the ground in which the sewer inlet is located to maintain the level of liquid in said insert means at the level of the ground surrounding the said sewer inlet, c. a lid means lying in said trough and over and around said opening to prevent gases from traveling through said opening when said trough means is filled with water while permitting liquids to flow through said opening, and d. a dome shaped cover means lying on top of said insert means, said cover means having a plurality of channels therein through which liquids may flow.