Patent ID: 6131605
Filing Date: 2000-10-17
Classification: B65D,F16K,Y10T

Abstract:
A freight container comprising:a floor with an inner upper skin and, spaced therebelow, a outer lower skin;a tubular housing having an outwardly projecting flange fixed to a lower face of the upper skin and projecting downward therefrom toward the lower skin;a tubular socket fixed to and protecting through the lower skin, fitting with the housing, and forming a downwardly open outlet;a partition disk formed with a hole, subdividing the housing into an upper compartment and a lower compartment, and forming at the hole an upper valve seat directed upward in the upper compartment and a lower valve seat directed downward in the lower compartment; andrespective lighter-than-water upper and lower valve bodies freely vertically movable in the respective compartments and sealingly engageable with the respective valve seats, whereby water in the lower compartment will float the lower valve body up against the lower valve seat and close the hole and water in the upper compartment will float the upper valve body up off the upper valve seat and open the hole.