Venting apparatus and system for marine craft fuel tank

Apparatus enabling the passage of vapor therethrough while preventing the discharge of liquid therethrough, comprising:

• an enclosed chamber;
• a first opening in said chamber;
• a second opening in said chamber;
• a retainer in said chamber, said retainer having an interior area, said retainer having an orifice at a first end thereof adjacent said first opening, and wherein said second opening is accessible from said interior area of said retainer at a second end thereof;
• a body movable in said interior area of retainer, said body blocking said second opening when adjacent thereto, said body floatable in said liquid;
• wherein when vapor flows through said chamber from said first opening to said second opening, said orifice produces a low pressure area adjacent said orifice, whereby said body is held away from said second opening.

Apparatus for enabling the passage of vapor therethrough while preventing the passage of liquid therethrough comprising:

• an enclosed chamber;
• a first opening in said chamber;
• a second opening in said chamber;
• an orifice in said chamber disposed between said first and second openings;
• a body movable in said chamber between said orifice and said second opening, wherein said body blocks fluid flow through said second opening when adjacent thereto, and wherein said body floats in said liquid;
• a plurality of arm members extending between said orifice and said second opening, said members disposed in surrounding relation of said body and preventing movement of said body traversely away from said orifice, and wherein said body is movable within an interior area bounded by said arm members between a position adjacent said orifice and a position in adjacent blocking relation with said second opening, and wherein when vapor flows from said first to said second opening said orifice produces an attractive force holding said body away from said second opening.

Apparatus for enabling the passage of vapor therethrough while preventing the passage of liquid therethrough comprising:

• an enclosed chamber;
• first means for providing fluid communication to and from the chamber;
• second means for providing fluid communication to and from the chamber;
• an orifice means in the chamber for producing an area of lower fluid pressure upon the passage of vapor therethrough;
• a body movable in the chamber between positions adjacent said orifice means and adjacent said second fluid communication means, wherein said body blocks said second fluid communication means when adjacent thereto, and wherein said body floats in said liquid;
• cage means for preventing movement of said body in a traverse direction from said orifice means;
• wherein when vapor passes through said chamber from said first means to said second means said orifice means is operative to hold said body adjacent to said orifice means whereby said body does not block flow through said second fluid communication means.