Patent ID: 8449216
Filing Date: 2013-05-28
Classification: E02D

Abstract:
1. A manhole cover assembly comprising: a frame defining a central opening, said frame including a safety stop portion; a cover hingedly attached to said frame such that said cover is pivotable between a closed position covering said central opening and an open position providing access to said central opening; and a safety device connected to said frame and said cover, wherein movement of said cover to said open position automatically moves said safety device to a locked position in which said safety device engages said safety stop portion and prevents movement of said cover to said closed position, wherein said safety device is manually movable when said cover is in said open position between said locked position and an unlocked position in which said safety device is disengaged from said safety stop and permits said cover to move to said closed position, wherein said frame includes a frame wall, and a post extending from said frame wall, said safety device defining a slot that receives said post, wherein said slot moves with respect to said post when said safety device is moved between said locked position and said unlocked position.