Patent ID: 6752565
Filing Date: 2004-06-22
Classification: E02D

Abstract:
A cover system for use with a ground surface and a communicating and downwardly extending manhole tube, said cover system comprising:a substantially annular shaped and three dimensional frame, encased within the pavement slab and such that a top edge extending surface of said frame lies substantially flush with a corresponding top edge surface of the slab, said frame further including an inwardly facing, annular extending and recessed ledge in communication with the manhole tube; a cover seatingly engaged and supported upon said recessed ledge, such that an upper edge surface of said cover is substantially flush with said top edge extending surface of said frame; and at least one externally threaded locking fastener arrayed at an angle relative to a perpendicular axis extending through said cover and said frame, said fastener exhibiting a flattened and extending shaft end inserting within at least one corresponding angular recess established between said frame and said cover and displaceable between an extended and locking position, whereby said shaft end is in abutting contact with an opposing side wall location of said frame and so that said cover is rigidly secured to said frame and an unlocked position, in which said abutting shaft end of said fastener is axially retracted and said cover is removable from said frame.