Drain valve used in aircraft

Details Drain valve used in aircraft Drain valve used in aircraft

1990-06-21

1991-11-05

Cohan, Alan

Fluid handling

Ambient condition change responsive

Atmospheric

137192, F16T 120, F16T 3122

Patent

active

050624415

ABSTRACT:
Disclosed is a valve used in the water drainage system of an aircraft having a pressurized cabin. The valve includes a housing with a water inlet and outlet and in which a float is mounted by a spring. The float includes a stopper element adapted to engage the water outlet in the housing. The water inlet is in communication with the cabin pressure and the water being discharged and the outlet is in communication with atmospheric pressure outside the aircraft. The spring normally biases the float so that the stopper element is away from the water outlet when the plane is on the ground. As the plane gains altitude, the differential in pressure between atmospheric pressure and cabin pressure closes the valve, with the spring moving the stopper element into engagement with the water outlet. This occurs in response to the changing differential in pressure between the cabin pressure and atmospheric pressure. When water fills a space between the housing wall and the float, the float moves away from the outlet, lifting the stopper element from the water outlet and allowing the water to be discharged.

REFERENCES:
patent: 4463774 (1984-08-01), Gorges
patent: 4506851 (1985-03-01), Gupta
patent: 4715561 (1987-12-01), Spinosa

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