Manhole structure

Claim 1

A MEMBER ADAPTED FOR DISPOSITION RELATIVE TO A TUBULAR MOUNTING OF A UTILITY INSTALLATION IN PAVING MATERIAL, SAID MEMBER BEING OF A ONE-PIECE CONSTRUCTION AND COMPRISING A TUBULAR PORTION AND ALSO A PLATE ADAPTED FOR DISPOSITION IN PAVING MATERIAL, SAID TUBULAR PORTION HAVING AN UPPER OFFSET EXTREMITY PROVIDED WITH AN INNER SURFACE AND A LOWER INSET EXTREMITY PROVIDED WITH AN UPPER SURFACE WHEREBY SAID SURFACES DEFINE AN INTERNAL RECESS ADAPTED TO RECEIVE A COVER, SAID PLATE PROJECTING LATERALLY OUTWARD AN EXTENT WHICH IS APPRECIABLY GREATER THAN THE WALL THICKNESS OF SAID TUBULAR PORTION AND SO THAT SAID LOWER EXTREMITY PROJECTS BELOW SAID PLATE FOR DISPOSITION IN AN INTERNAL RECESS OF A MOUNTING FOR LOCATING THE MEMBER IN RELATION THERETO, SAID PLATE HAVING A SUBSTANTIALLY UNIFORM THICKNESS WITH UPPER AND LOWER SUBSTANTIALLY PARALLEL SURFACES, AND BEING PROVIDED WITH A PLURALITY OF RELATIVELY LARGE ELONGATED OPENINGS EXTENDING THERETHROUGH WHICH ARE DISPOSED INTERMEDIATE ITS WIDTH GENERALLY ABOUT SAID TUBULAR PORTION, SAID OPENINGS ADJACENT SAID UPPER SURFACE OF SAID PLATE BEING LARGER THAN ADJACENT SAID LOWER SURFACE OF SAID PLATE WHEREBY TO ASSIST IN ANCHORING SAID MEMBER IN PAVING MATERIAL WHEN THE LATTER IS RECEIVED IN SAID OPENINGS.