Locking Cover Assembly For Preventing Unauthorized Access To A Utility Shut Off Valve

A security cover assembly for deterring access to a utility shut off valve through an open topped curb box;

• said security cover assembly including a cover member configured to cover the open top of a curb box;
• a clamping disc held beneath said cover member by a security screw inserted in a hole in said cover member and rotatable therein while being held projecting axially down from an underside of said cover member, a lower end of said security screw received in a threaded hole in said clamping disc;
• said curb box provided with an integral flange radially projecting into a space defined within said curb box, said flange conventionally able to receive a conventional security bolt in an off-center threaded hole in said flange;
• said clamping disc formed with a cutout of a shape matching said flange shape to enable said clamping disc to move axially past said flange to a position below said flange when said cover assembly is rotated to align said cutout with said flange to allow installation and removal of said lid assembly to and from said curb box;
• rotation of said security screw by a key in one direction causing said clamping disc to thereafter be able to be drawn upwardly into engagement with an undersurface of said flange to create a rugged connection between said cover member and said curb box, and when rotated in an opposite direction lowering said clamping disc to be disengaged from said undersurface of said flange.