Condensate drain fitting with check valve and stepped diameters

Details Condensate drain fitting with check valve and stepped diameters Condensate drain fitting with check valve and stepped diameters

1991-03-20

1992-06-23

Dawson, Robert A.

Valves and valve actuation

With correlated flow path

Pipe side

137798, 210117, 251148, 285156, 285176, 285197, 285382, F16L 500, F16L 4108

Patent

active

051236273

ABSTRACT:
A drain fitting adapted to receive and direct condensate into a drain pipe comprises a cylindrical body with multiple stepped diameters for attaching condensate drain hoses of different sizes, and includes an internal one-way ball check valve to prevent material from reversing flow and escaping out of the drain pipe. The body attaches to the drain pipe by either a clamped-on connector consisting of multiple parallel hinged elements molded integral with both the fitting body and with each other, or by being glued into a screwed-in fitting received in the threaded opening of a Y-branch fitting in the drain pipe. The ball is retained in the check valve opening by ridges formed by pressing a hot tool to crimp over the edges of the fitting opening.

REFERENCES:
patent: 2688499 (1954-09-01), Hanson
patent: 2898128 (1959-08-01), Shohan
patent: 3119887 (1964-01-01), Baehr
patent: 3648729 (1972-03-01), Balkany
patent: 4966397 (1990-10-01), McKinnon
patent: 5020832 (1991-06-01), Coblentz

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