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US 7,451,570 B1Granted
Casting riser pan
OwnerPeter W. Gavininventor
Life of this patent
Estimating the term…
Abstract
A casting riser pan for defining an access opening in a cast concrete structure, serving as a cast for a cover for closing the access opening, and serving as a seat for the cover. The casting riser pan includes an orientation element for orienting the cover in case of out of round distortion of the casting riser pan and the concrete cover, an inner wall and an outer wall for increased radial strength, and a continuous securement element for attaching the casting riser pan to a casting mold for simultaneously casting the concrete structure and the cover.
Claims45
A casting riser pan comprising:
- a wall having a top portion, a bottom portion, and an orientation element;
- said wall defining an opening having an axis therethrough and substantially normal thereto, said wall generally corresponding to the periphery of a removable concrete cover having an orientation element generally corresponding to and configured to mate with said orientation element of said wall to facilitate seating of said cover in said casting riser pan in a predetermined angular orientation about said axis with respect to the angular orientation of said casting riser pan about said axis.
A casting riser pan comprising:
- an inner wall having an top portion, a bottom portion, and an orientation element;
- an outer wall;
- said inner wall defining an opening having an axis therethrough and substantially normal thereto, said inner wall generally corresponding to the periphery of a removable concrete cover having an orientation element generally corresponding to and configured to mate with said orientation element of said inner wall to facilitate seating of said concrete cover in said casting riser pan in a predetermined angular orientation about said axis with respect to the angular orientation of said casting riser pan about said axis.
Dependencies are inferred from the claim text.