Precast concrete drain inlet

Details Precast concrete drain inlet Precast concrete drain inlet

1992-12-18

1994-11-01

Bui, Thuy M.

Road structure, process, or apparatus

Drain or gutter

404 4, 52 20, 52 21, E01C 900

Patent

active

053602846

ABSTRACT:
A drain inlet provides a hollow concrete shell and has a cylindrical bottom section and a square top section. A first opening in the bottom section includes a first lip formed on an interior wall thereof and recessed from the bottom opening. The first lip includes a first step and a second step. A gasket is adapted to fit within the bottom opening and abut the first step. The second step provides a stop for inserting the drain inlet over a riser. A second opening in the top section includes a second lip formed on an interior wall thereof and recessed from the top opening.

REFERENCES:
patent: D280126 (1985-08-01), Provan et al.
patent: 3246582 (1962-09-01), Wade et al.
patent: 4203686 (1980-05-01), Bowman
patent: 4469467 (1984-09-01), Odill et al.

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