The present application provides a cover assembly having a frame and a cover removably connected to the frame. The cover is sealed to the frame by a sealing device, and the cover is removably connected to the frame by fasteners without interfering with the seal to prevent leakage through the area around the fasteners. The frame and cover each also have a plurality of alignment indicators that are aligned with one another to assist an operator in securing the cover to the frame.

A manhole cover system for a roadway includes a rotationally fixed outer support securable to an interior of a roadway opening, and an inner sleeve positioned inside of the outer support. The outer support and the inner sleeve share a common central axis. A manhole cover is located at an upper vertical end of the inner sleeve, and a threaded arrangement including a support thread of the outer support is engaged with a complimentary sleeve thread of the inner sleeve, such that rotation of the inner sleeve about the central axis moves the inner sleeve and the manhole cover along the central axis.

An insulating disc can be easily installed and removed from inside a riser of a septic tank. The insulating disc is seated atop an opening of the tank lid and seals around the riser inner surface. The disc can include a core formed of R-10 extruded polystyrene sandwiched between two layers of high-density polyethylene. A flexible gasket can extend outward from the disc to seal against the inner surface of the riser. Retention tabs can also be provided to center and hold the disc in place. The disc can be divided into two semicircular halves that are hinged together. A hook, eyebolt and/or rope can be used to aid in removing the disc from the riser.

A manhole includes a device for safely closing and locking the manhole, which has a cylinder with centering pins that is attached to a slab and is rotatable with an operating key acting on the pins, and further includes an anti-burglary block, which in locked position is positioned inside the cylinder and hides and protects an anti-theft bolt positioned inside a hole, which crosses the entire anti-burglary block and has a larger diameter at the front and the same diameter as the anti-theft bolt in the back, so as to receive the anti-theft bolt in a threaded spot in the inner wall of the cylinder and enable placement of the anti-theft bolt in the body of the anti-burglary block when totally tightened into the threaded spot, wherein the end of the anti-theft bolt, in closed position, is housed in a locking hole on a circular support of the cover.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

The present disclosure provides an advantageous underground enclosure/assembly for housing electrical components. More particularly, the present disclosure provides an underground enclosure/assembly (e.g., handhole/pullbox assembly) that is configured to protect wiring connections and provide access to those connections for initial installation, and later for maintenance/alteration. The present disclosure provides for a cylindrical body and a frame with a lip feature to interface with the cylindrical body to enhance the durability and to assist in maintaining the circularity of the cylindrical body. The advantageous frame provides for a feature (e.g., a notch) to integrate fill materials with the frame. The frame further includes features for interfacing a cover.

The present application provides a cover assembly having a frame and a cover removably connected to the frame. The cover is sealed to the frame by a sealing device, and the cover is removably connected to the frame by fasteners without interfering with the seal to prevent leakage through the area around the fasteners. The frame and cover each also have a plurality of alignment indicators that are aligned with one another to assist an operator in securing the cover to the frame.

A manhole cover assembly comprises a base frame, the base frame comprising a base body and a base flange extending laterally outward from the base body. The assembly further comprises a top frame, the top frame comprising a top body disposed annularly about at least a portion of the base body, a top flange extending laterally outward from the top body, and a lip extending laterally inward from the top body.

A laminous processed manway cover gasket includes an insert and a plurality of ePTFE layers of membranes wrapping the insert to result in isolation of the insert. In example, the isolation may result from a laminous, thermo-mechanical process that fuses together each ePTFE layer of membrane of the plurality of ePTFE layers of membranes.

A manhole base assembly and a method for making the same employ a non-cylindrical, low-volume concrete base that is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures to interface with various underground systems, and can be formed on-site to facilitate compatibility with existing structures. The assembly provides for flexible, modular construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.