Patent ID: 6109822
Filing Date: 2000-08-29
Classification: E02D

Abstract:
A cover assembly comprising a lid and a lid support, said lid having an annular rim having a lower surface, said lid support having an annular ledge having an upper surface in contact with the lower surface of the rim of said lid, said lid support further having an annular flange protruding inwardly thereof beneath the annular ledge of said lid support, said annular flange of said lid support having a substantially upright cylindrical inner surface with upper and lower edges, an annular resilient flap secured to said lid for rotation therewith and having an exterior portion extending outwardly and upwardly relative to said substantially upright cylindrical inner surface of said lid support and having a portion of said exterior portion of said annular resilient flap in contact with said substantially upright cylindrical inner surface of said lid support prior to rotation of said lid, said exterior portion of said annular resilient flap is moved only upon rotation of said lid to a position where said portion of said exterior portion of said annular resilient flap is moved out of contact with said substantially upright cylindrical inner surface of said lid support to a position below said lower edge of said annular flange of said lid support, and a container attached to and depending from said lid and a granular material in said container for weighing down the lid.