HYBRID HAND HOLE

MANHOLE COVER, MANHOLE COVERING AND MONITORING SYTEM

COVER SYSTEM FOR CONTROLLED ENTRY OF ACCESS HOLES FORMED IN OVERPASSES, FREEWAYS, BRIDGES, OR ROADS AND METHOD OF INSTALLATION

SECONDARY SAFETY LID FOR A RISER SYSTEM

ENCLOSURE SYSTEM FOR UNDERGROUND UTILITY CONNECTIONS

RISER RING ASSEMBLY

Sealed Hatch Assembly for Underground Enclosure

Selectively Frictionally Engaged Hole Cover

MANHOLE COVER ASSEMBLY

HATCH ASSEMBLY

FRAME AND COVER FOR INGROUND UTILITY ENCLOSURES

MANHOLE LOCK SYSTEM

LOCKING APPARATUS FOR MANHOLE IRON COVER

Anchored hole cover

Locking element

Lid for utilities enclosure having internal reinforcement matrix and method for making lid

SECURED SERVICE COVER ASSEMBLY

Locking assembly

Manhole apparatus

Cover device

Safety grate

Locking security cover for a valve box

System and method of monitoring a utility structure

Locking subgrade vault

Cover device

Manhole comprising a device for safety closing and locking the manhole

Lockable composite manhole cover system, apparatus and method

System and method of monitoring a utility structure

METER COVER

Method of monitoring access covers of underground infrastructure

Device for Securing Covers of Drainage Holes and the Like

Security cover for a valve box with a positively operated automatically lubricated locking mechanism

Sump backfill protector

TUBULAR INSERT FOR EXCAVATED HOLE WITH SAFETY COVER

Manhole cover assembly

Manhole cover assembly

Safety grate

Closure systems, debris caps, holder devices, and related technologies

Tubular insert for excavated hole with safety cover

Portable manway securing apparatus

Locakable manhole covers and methods for locking a manhole cover

LOCKING COVER FOR CONSTRUCTION VAULT

Underground security barrier

Manhole cover assembly

Manhole cover assembly

Manhole cover locks, lockable manhole covers, and methods for locking a manhole cover

Locking subgrade vault

Closure, particularly for closing construction and technological apertures

Closure for locking a covering

Locking cover for construction vault

Security Locking Device for Enclosure Covers

Pressure responsive locking latch arrangement for manhole covers

Controlled pressure release manhole cover assembly

Handhole and manhole anti-theft insert

ACCESS DOOR

High capacity filter element end cap

Frameless access panel

MANHOLE COVER LOCKING DEVICE

Dish for use in a manhole

Corrosion-resistant self-locking manhole cover

Manhole cover assembly with cams

Time-based digitizer for PET photodetector

UTILITY CHAMBERS AND SURROUNDS AND METHODS THEREFOR

Stationary self-draining fastening post with vibration-free frame attachment for traffic-rated utility vault cover

MANHOLE AND SEWER BASIN COVER

Externally installable curb inlet catch basin filtration apparatus

Locking utility pull box lid

Pick hole guard for manhole covers

Locking mechanism for a cover

Manhole cover

Locking subgrade vault

Street ironwork

Corrosion-resistant self-locking manhole cover

Security cover for a utility ground box and method

Storm grate lock device and method of use

Latch Mechanism For Manhole Cover with Captured Operator

Manhole security cover

Molded sectioned riser and locking cover

Fastener for street ironwork, assembly, street ironwork and corresponding method

Corrosion-resistant self-locking manhole cover

Cover for a road system device and corresponding road system device

Pick hole guard for manhole covers

Anti-Theft Device for Removeable Manhole and Gully Covers

Molded sectioned riser and locking cover

PIT COVER

Manhole cover stop mechanism

Manhole security system

Method and mechanism for opening and closing of manhole covers

Self-locking manhole cover

Manhole system

Device for blocking an articulation axis in the housing of a crown member, such as a grid or a buffer, in a road porthole

Method of controllably venting gases generated by explosions in a manhole space

Device for closing an opening, particularly a street manhole

LID STABILIZING APPARATUS

Security device for manhole access opening

PICK HOLE GUARD FOR MANHOLE COVERS

Device for articulating a cover or lid to a frame in particular of a manhole

Manhole with locking device

Device for Locking a Cover of a Manhole Top, and Manhole Top

Inspection port

Security Device

Manhole system

Swing-out manhole cover

Lid for a Shaft Cover and Shaft Cover

DEVICE FOR LOCKING AND UNLOCKING BY MEANS OF A WRENCH, A PLUG OR LID ON A FRAME, NOTABLY OF A MANHOLE

Manhole insert and tether locking apparatus and method

Security system for sewage, aqueduct, telephony and energy caps

Manhole cover security lock with controlled pressure release

ACCESS COVER

Municipal casting frame and method of manufacturing same

Covered Plastic Lock

Holding element for gratings

Covering apparatus for opening of underground pipeline or box

Catch basin curb inlet cover

Method and apparatus for locking a manhole cover

Molded sectioned riser and locking cover

Device for verification of locking or unlocking a lock that immobilizes a cover in and closing a frame

Socket hinged construction casting assembly

Cover arrangement

Device permitting a plug or a cover to lock in a detachable manner onto a frame

Socket hinged construction casting assembly

Locking mechanism

Device for locking and unlocking a cover or lid on a frame by means of a key

Device that makes it possible to lock and unlock, by means of a key, a stopper or cover on a frame

Lockable manhole cover

Grate for closing a drain and similar

Apparatus and method to secure manhole accessways

Device for closing an opening, particularly a man hole

Locking cover for a soffit manhole

Selectively frictionally engaged hole cover

Manhole cover

Anchored hole cover

Retainer for closure device

In-ground blind

Flood control system panels for subway entrance

Watertight hatch