Drain grate with primary and secondary weirs

Details Drain grate with primary and secondary weirs Drain grate with primary and secondary weirs

1989-05-17

1990-10-09

Spear, Frank

Liquid purification or separation

Structural installation

Grated inlet surface drain

210166, 405127, E03F 514

Patent

active

049618482

ABSTRACT:
An improved roof drain cover useful in minimizing the changes of comparatively large amounts of water backing up around the drain can be constructed so as to include primary and secondary rims serving as weirs located on a flange which extends around a centrally positioned grate. The primary rim is formed at the periphery of the flange and integrally therewith, while the secondary rim is formed adjacent the junction of the flange and grate and forms a channel with the grate. Notches are provided in these rims so as to permit water flow through them. The dimensioned rims are so that, as such inorganic particles accumulate against them, lighter organic material such as leaves will be carried by draining water over the rims and up against the grate.

REFERENCES:
patent: 1266948 (1918-05-01), Holt
patent: 2256626 (1941-09-01), Rile
patent: 2284416 (1942-05-01), Gordon
patent: 2666493 (1954-01-01), Gordon
patent: 3529723 (1970-09-01), Hagedorn
patent: 4652365 (1987-03-01), Ebeling

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