Moveable manhole cover

A manhole includes a carriage mounted on the underside of the cover that cooperates with a supporting guide channel located across the mouth of the manhole. the guide channel can be rotated to an incline so that the carriage can easily roll onto and from the supporting guide member. The free end of...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	NELSON, THOMAS G, MILO, JOSEPH V, BREHENY, MICHAEL P, ANDREWS, CHRISTOPHER M, PETTESCH, MARTIN C
Format:	Patent
Sprache:	eng
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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