A manhole cover assembly includes a manhole cover supportable by a manhole frame. The manhole cover defines a latch bore having a longitudinal axis. A latch housing extends from the manhole cover, and a latch assembly is positioned at least partially therein. A first end of a latch yoke extends through the latch bore and slidably couples the latch yoke to the manhole cover along the longitudinal axis. A latch member is rotatably coupled to the second end of the latch yoke about a first transverse axis perpendicular to the longitudinal axis. The latch member is also rotatably coupled to the latch housing about a second transverse axis spaced from the first transverse axis. The latch member is selectively rotatable relative to the latch housing about the second transverse axis, between a locked position and an unlocked position, via sliding the latch yoke relative to the manhole cover.

A locking assembly is provided for a cover. The cover is a substantially rigid cover configured to close off an opening to a void, said void bounded by a side wall. The cover defines a top side and an opposed underside. The locking assembly includes a mounting arrangement mountable to the underside. A link is pivotally connected to the mounting arrangement. The link defines a first end and a second, free end. A locking member is carried by the second, free end of the link. The locking member frictionally engages the side wall of the void in a locking position, in use. An actuating member connects to the link and is accessible via the top side. The actuating member displaces the link relative to the mounting arrangement to cause the locking member to frictionally disengage from the side wall of the void to a disengaged position.

A cover device includes a cover plate having a body portion with inner and outer surfaces. A deployable retainer mechanism is positioned on the inner surface of the cover plate and includes a plurality of engagement features operable between retracted and deployed positions. An adjustment mechanism interconnects the deployable retainer mechanism and the cover plate, wherein the adjustment mechanism includes a portion thereof that is accessible from the outer surface of the cover plate for moving the plurality of engagement features between the retracted and deployed positions.

A valve box lock for preventing unauthorized access to a shut off valve including a security bolt extending through a hole in a valve box cover and received into a threaded hole in a cam piece mounted to the undersurface of the cover, the cam piece is moved up and down by rotation of the security bolt in either direction. The cam piece engages a pair of locking plates which are moved radially out into engagement with an inner surface of the valve box to prevent removal of the cover when the security bolt is rotated in one direction, or are retracted radially to release the cover so as to be able to be removed. A automatic lubricating arrangement is associated with the security bolt to insure that it is able to be turned by excluding any.

An apparatus for use with a manhole and a cable, and a method thereof, is provided. The apparatus comprises a frame having an opening and a coupling mechanism for releasably securing the frame about the manhole such that the opening communicates with the manhole. The apparatus also includes a bearing secured to the frame adjacent the opening, the bearing having a surface over which a cable may travel in a manner that reduces wear on the cable when the cable is fed into or drawn through the opening in the hole.

A safety grill or grate for use with a camera and the like during maintenance.

A cover device for use with an aperture disposed through a surface and having an inner perimeter surface includes a cover plate having a body portion with inner and outer surfaces and at least one elongated channel disposed therethrough. The cover plate includes a plurality of retention members extending inwardly into the at least one elongated channel. At least one engagement feature is operably coupled to the cover plate at the at least one elongated channel and slidably disposed along the at least one elongated channel between retracted and deployed positions. The at least one engagement feature includes at least one engagement member disposed below the inner surface of the cover plate that engages the inner perimeter surface of the aperture when the at least one engagement feature is in the deployed position when the cover plate is positioned over the aperture.

A locking system for a utility vault including an I-beam extending across an opening in utility vault, a two-piece lid positioned in the opening over the I-beam, brackets positioned on opposite ends of each piece of the two-piece utility lid for engaging an inside wall surface of the utility vault and the I-beam, and a three-tier locking system positioned at an end of one piece of the two-piece lid to lock the lid to the vault including a L-bolt lock, a padlock and a lockable door on an upper surface of the lid.

A lockable manhole cover system including a manhole cover and a locking mechanism attached to the bottom surface thereof and including a fixed end and an actuated end, each including locking pins movable between locked and unlocked positions. The actuated end includes a keyed lock. When in the locked position, the free ends of the locking pins extend beneath a flange prevent the cover from being lifted up. When the actuated side is moved to the unlocked position via the key, the locking pin free ends retract such that the cover is free to be lifted from the ring. On the fixed side, the locking pins are biased to move to their extended positions upon manual depression of a release stem located at the upper surface of the cover.

A safety grill or grate for use with a camera and the like during maintenance.