Drain cover

Details Drain cover Drain cover

1979-12-19

1981-03-24

Granger, Theodore A.

Liquid purification or separation

Structural installation

Grated inlet surface drain

E03F 100

Patent

active

042578922

ABSTRACT:
An improved drain cover comprising a one-piece top disc and depending cylindrical body adapted to be readily inserted into a drain pipe with the disc resting on the floor and overlying the pipe opening. The body is formed with four radial slots in which trapezoidal locking slugs are slidably positioned. The body is also formed with a central bore, the lower portion of which is adapted to receive a frusto-conical camming plug. A threaded bolt is slidably positioned through the disc and is threadedly engageable with the plug. When the bolt is tightened, it raises the plug into the bore where it cams the slugs outwardly into locking engagement with the drain pipe.

REFERENCES:
patent: 931019 (1909-08-01), Dawes et al.
patent: 1195827 (1916-08-01), Luke
patent: 2800231 (1957-07-01), Hicks
patent: 2928419 (1960-03-01), Kruse
patent: 3212416 (1965-10-01), Boersma
patent: 3674149 (1972-07-01), Donalson
patent: 3727763 (1973-04-01), Arenskov
patent: 4042983 (1977-08-01), Carpentier

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