Liquid purification or separation – Structural installation – Grated inlet surface drain
52 20, 404 25, B01D 3502
A drain cover having separable mounting means which is adjustable for operational installation in drain pipes of varying standard sizes. The mounting means comprise resilient fingers having short feet which are releasably engageable in radially spaced stirrups die punched from the drain cover disc. In another preferred embodiment, the drainage openings comprise elongated slots having roll formed tubular sockets depending therefrom and the resilient fingers have pairs of wire feet which are frictionally engageable in said sockets.
patent: 3212416 (1965-10-01), Boersma
patent: 3251159 (1966-05-01), Trice
patent: 3390224 (1968-06-01), Wyatt
patent: 3920347 (1975-11-01), Sauriol et al.
patent: 3973856 (1976-08-01), Gaglioti
patent: 4000953 (1977-01-01), Langeliers et al.
patent: 4257892 (1981-03-01), Boersma
patent: 4466219 (1984-08-01), Campolito
Fisher Richard V.
Kaufman David D.
Millard Wanda L.
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