A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

A system for use with a connection comprising a terminus opening into an underground vault. The system includes a perturbation detector and a system controller. The perturbation detector is configured to detect values of each of one or more properties and transmit a signal encoding the values to the system controller. The system controller is configured to receive the signal, use at least one of the values to determine whether a fire is occurring or has occurred, and alert a user when the system controller determines that the fire is occurring or has occurred.

A device for detecting and alleviating flooding and blocked storm sewers includes a manhole cover coupled to a float body. The device also includes a canister having a drain hole and a valve. The device also includes multiple guides that can catch onto part of a sewer. The device is configured such that when water flows into the canister, the manhole cover, float body, and guides rise and the valve is opened.

A system including a backfill protector including a skirt having an opening configured to receive a cover therein and a lip extending around a perimeter of the opening. The lip is configured to support the cover thereon, and the skirt further includes an inwardly-extending channel positioned adjacent to the lip.

In the present invention, when a circular lid body is opened or closed by a hinge-coupling structure at an eccentric location out of a circle, the circular lid body can be opened or closed without interference between an edge protrusion part of the circular lid body and a circular edge support frame of a support frame body. Therefore, the present invention is useful in that the present invention has overcome innumerable interferences on arcs through a curve insertion scheme of a circular structure, that is, a curve insertion scheme by a rotational inclination angle ? of the edge protrusion part and an operation model view of an S-shaped hinge curve part.

A system including a backfill protector including a skirt having an opening configured to receive a cover therein and a lip extending around a perimeter of the opening. The lip is configured to support the cover thereon, and the skirt further includes an inwardly-extending channel positioned adjacent to the lip.

A manhole cover assembly includes a manhole cover and a latch assembly. The manhole cover is movable between a seated position in which the manhole cover is supported on a seat of a manhole frame, and an unseated position in which the manhole cover is displaced relative to the seat of the manhole frame. A shock absorber includes a housing fixedly coupled to the manhole cover. The housing defines a cylinder. A piston is slidably coupled to the cylinder. A rod is fixedly coupled to the piston. A spring is positioned within the cylinder adjacent the piston. A latch is fixedly coupled to the rod. In response to a pressure applied to the manhole cover, the latch assembly is configured to permit limited displacement of the manhole cover relative to the seat of the manhole frame, and to controllably dissipate energy relating to the pressure.

A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

A device for sealing the opening of a manhole. The device includes a seal coupled to a lid; a valve; and a compression inducing device. The lid is set within an existing manhole frame and operates without modification. The seal is coupled to a lower surface of the lid and contacts a lip within the frame. The seal is compressed to the lip and the compression inducing device is used to grip the frame below the lip to maintain the compressive state of the seal. The manhole cover is placed on top of the lid. Gases escape through the valve. Water or moisture is prevented from passing through the seal or valve. One or more grooves or ribs are optionally included to create a gap between the lid and the manhole cover for the routing of released gases.