Automatic drain for freight container
First Claim
1. 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; and
respective 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.
3 Assignments
0 Petitions
Accused Products
Abstract
A container having a floor with an upper inner face and a lower outer face is provided with a drain having a tubular housing extending between the faces and a partition formed with a hole, subdividing the housing into an upper compartment and a lower compartment, and forming at the hole an upper valve seat and a lower valve seat. Respective floatable upper and lower valve bodies in the compartments sealingly engageable with the respective valve seats. Thus with this system when the upper compartment fills with liquid it floats up the upper ball to unblock the hole in the partition and let this liquid drain out. If, however, water rises in the lower compartment, it will float up the lower ball to block the passage and prevent this liquid from flowing up through the passage into the container.
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Citations
8 Claims
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1. A freight container comprising:
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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; and respective 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification