Automatic drain device

Details Automatic drain device Automatic drain device

1990-11-19

1994-08-16

Walton, George L.

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137204, 137392, F16K 3102, F16T 100

Patent

active

053377796

ABSTRACT:
An automatic drain device in an air compressor system includes an electrode sensor in a liquid collection cell. An electronic control detects an electrical change in the electrode sensor resulting from contact with liquid in the liquid collection cell and energizes a drain valve for a predetermined time effective to drain the liquid collection cell. A cycle timer triggers the energization of the drain valve when the electrode sensor fails to provide the required electrical change for a predetermined cycle time. Test inputs permit driving the electronic control to simulate sensing of liquid, and also permit energization of the drain valve without involving the remainder of the electronic control.

REFERENCES:
patent: 2564873 (1951-08-01), Wright
patent: 4119116 (1978-10-01), Johnson et al.
patent: 4261382 (1981-04-01), Bridges
patent: 4336821 (1982-06-01), Frantz et al.
patent: 4453893 (1984-06-01), Hutmaker
patent: 4505427 (1985-03-01), Bridges
patent: 4974626 (1990-12-01), Koch

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