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US 7,744,304 B2Granted
Socket hinged construction casting assembly
AssigneeNeenah Foundry Company
InventorsSteven M. Akkala, Timothy J. Law
Life of this patent
Estimating the term…
Abstract
A manhole or hatch cover assembly includes a frame defining an opening and a cover having a top surface, a bottom surface and a perimeter sized and dimensioned for receipt in the frame opening. The cover is coupled to the frame through a hinge connection and moveable between a closed positioned resting across the opening in the frame and an open position. A latch is pivotally coupled to the cover adjacent the hinge. The latch is selectively rotated onto the frame to retain the cover in the open position.
Claims5
A manhole or hatch cover assembly comprising:
- a frame including an inner flange extending radially inward from an edge of the frame;
- a cover, the cover having a top surface, a bottom surface and a perimeter sized and dimensioned for receipt in the frame, the cover being coupled to the frame through a hinge connection and moveable between a closed positioned resting in the frame and an open position in which the frame is open;
- and
- a latch pivotally coupled to the bottom surface of the cover adjacent the hinge, the latch being selectively rotated onto the inner flange to retain the cover in the open position.
1 more element
Dependencies are inferred from the claim text.