Drain trap and cover construction

Details Drain trap and cover construction Drain trap and cover construction

1976-05-17

1977-08-23

Cline, William R.

Fluid handling

With liquid valves or liquid trap seals

Liquid seal in liquid flow line; flow liquid forms seal

16DIG13, F16K 900

Patent

active

040433544

ABSTRACT:
A drain trap and cover assembly adapted for installation at the upper end of a vertical drain pipe passing through the concrete floor comprises a cup-shaped bowl having a flange at its upper end to which is pivoted a cover swingable between bowl-closing and bowl-opening positions. The pivotal connection comprises a pivot pin carried by the cover and rotatably accommodated in a socket formed in the flange. The socket has a throat which opens into the socket, the size of the throat being slightly less than the diameter of the pivot pin. The material from which the flange is made is sufficiently resilient to enable the throat opening to be enlarged and allow passage from the pivot pin into the socket, following which the throat opening reassumes its normal size to capture the pivot pin within the socket.

REFERENCES:
patent: 748936 (1904-01-01), Edelen
patent: 1469790 (1923-10-01), Hysko
patent: 2797840 (1957-07-01), Gibbs
patent: 3156756 (1964-11-01), Seaver
patent: 3829061 (1974-08-01), Dayne et al.
patent: 3933173 (1976-01-01), Kajita

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