Patent ID: 7908710
Filing Date: 2011-03-22
Classification: E02D,Y10T

Abstract:
1. A manhole cover device comprising: a frame having an opening and a peripheral rim surrounding the opening, the peripheral rim having an inside surface facing the opening and an outside surface opposed to the inside surface; a cover articulated to the frame for moving the cover between a closed position, closing the opening of the frame, and an open position for accessing the opening of the frame; a housing on the peripheral rim of the frame, the housing having a male component extending from the cover and including a tubular barrel located in the housing and having a bore with an inside diameter, the barrel including respective stubs located at each of two ends of the barrel, the stubs projecting in a common plane from a single side of the barrel, perpendicular to the bore of the barrel, respective stubs engaging corresponding recesses in the bottom wall, by gravity, when the cover is in the open position, thereby holding the cover in the open position and preventing movement of the cover to the closed position; and a hinge pin having an outside diameter smaller than the inside diameter of the bore of the barrel and insertable in the bore of the barrel and the holes in the end walls of the housing, and attachable, at ends of the hinge pin, to the end walls of the housing, the outside diameter of the hinge pin being sufficiently smaller than the inside diameter of the bore so that,