Drain apparatus

Details Drain apparatus Drain apparatus

1991-09-27

1992-11-17

Reese, Randolph A.

Hydraulic and earth engineering

Drainage or irrigation

137107, 1372361, 1375124, 137843, 251368, F16K 1514, E03B 708

Patent

active

051637790

ABSTRACT:
A drain valve modifiable for use under different water pressures by merely changing the material of valve member within the drain valve. The drain valves are used in a fluid system to produce a fluid system that respond to local water pressure conditions. In one embodiment the drain valves include an extended inlet port that project into the water supply line to prevent complete drainage of the irrigation system and thus conserve water from one watering cycle to the next. Another embodiment of the drain valve includes multiple resilient members for sequence action in opening and closing of the drain valve. Still another embodiment permits a user to change the size of the drain passage by placing an insert in the drain passage of the drain valve.

REFERENCES:
patent: 218024 (1879-07-01), Hennessy et al.
patent: 3143135 (1964-08-01), Cornelius
patent: 3456683 (1969-07-01), Roulet et al.
patent: 3779276 (1973-12-01), King
patent: 3999570 (1976-12-01), Clements
patent: 4244378 (1981-01-01), Brignola
patent: 4890640 (1990-01-01), King

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