A tubular insert sleeve system comprises a tubular insert sleeve for insertion into an excavated hole and a snug fitting and removable safety cover adapted to extend over the upper end of the tubular insert sleeve in order to cover the excavated hole. One or more sleeve fastening apertures are defined through the tubular insert sleeve adjacent the upper end thereof, and are adapted to receive one or more vermiform fasteners for fastening the safety cover to the tubular insert sleeve. Preferably, the sleeve fastening apertures are in the form of handles. In some embodiments, one or more cover fastening apertures are defined through the safety cover and the cover fastening aperture(s) cooperate with the sleeve fastening aperture(s) to receive the vermiform fastener(s) to fasten the safety cover to the tubular insert sleeve.

The safety device is to be installed in a well. The safety device is has a support structure that is arranged to be lowered at least partly into the well and that restricts the movement of the safety device in the horizontal direction. A collar is in connection with the support structure and arranged to be set against the ground to restrict the movement of the safety device in the vertical direction, with a protective structure arranged on the collar to define a safe working area around the well.

A repair bracket that provides a substitute for one or more broken anchoring tabs of a manhole base. The repair bracket is an expansible bracket that has a frame member with a central manhole access passage through the frame member. The frame member has threaded holes transversely through the frame member and located at positions corresponding to positions of threaded holes in the original unbroken anchoring tabs of the manhole base. The threaded holes are used to connect the frame member to a manhole cover by threaded bolts extending through the cover and into the threaded holes. Expansible actuators are mounted to the frame member and are capable of moving a part of the expansible bracket outward into engagement against the inner wall of the base or a sleeve or casing attached to the base.

A dish for use in a manhole having a manhole cover covering a manhole opening and a frequency transmitting system for use in a manhole are provided. The dish and the frequency transmitting system is configured to transmit a signal to a network through the manhole cover. The signal is generated by a sensor unit disposed within the manhole and configured to detect the conditions of the manhole.

Embodiments generally relate to modular access covers. Example embodiments relate to an access cover assembly comprising: a first set of modular access covers and a second set of modular access covers, wherein in each set, adjacent covers are coupled; and a support frame comprising end frame pieces, side frame pieces, wall boxes, and a support beam. The end frame pieces and side frame pieces define a support plane to support the first and second sets of modular access covers. The wall boxes define a support surface to support the support beam and the end frame pieces, and the support surface is offset from the support plane and the wall boxes are connected to the end frame pieces and receive respective ends of the support beam.

A manhole marker assembly for attaching to a manhole cover to identify a manhole comprises a marker assembly base, a marker mounted to the marker assembly base, and a clamp mounted to the marker assembly base. The clamp comprises a first jaw and a second jaw. At least one of the first jaw and the second jaw are movable and can be engaged to a manhole cover to attach the manhole marker assembly to the manhole cover.

The invention relates to a manhole cover (10) for a manhole covering (50) comprising at least one locking device (20) for locking the manhole cover (10) to a shaft frame (40) of the manhole covering (50), wherein the locking device (20) has a latch (21) which is movable between an unlocking position (I) and a locking position (II), and a monitoring device (30) for monitoring the locking, wherein the latch (21) is movable from the locking position (II) into a pressing position (III) in order to press the manhole cover (10) firmly against the shaft frame (40) during use, wherein the monitoring device (30) is designed to detect the unlocking position (I), the locking position (II), and the pressing position (III) of the latch (21).

A manhole marker assembly for attaching to a manhole cover to identify a manhole comprises a marker assembly base, a marker mounted to the marker assembly base, and a clamp mounted to the marker assembly base. The clamp comprises a first jaw and a second jaw. At least one of the first jaw and the second jaw are movable and can be engaged to a manhole cover to attach the manhole marker assembly to the manhole cover.