초록 ▼

A apparatus (10) for enabling the discharge of air and vapor from the head space of a fuel tank while preventing the discharge of liquid therethrough, has an inlet (12) in communication with the head space and an outlet (14) in connection with atmosphere. The apparatus has an internal chamber (22).

A apparatus (10) for enabling the discharge of air and vapor from the head space of a fuel tank while preventing the discharge of liquid therethrough, has an inlet (12) in communication with the head space and an outlet (14) in connection with atmosphere. The apparatus has an internal chamber (22). A body (54) is positioned above an orifice (44) in a retainer (36) inside the chamber. A relief element (72) with an opening (74) therethrough is positioned between the body and the outlet. When air and vapor flow through the device, Bernoulli\s Principle causes the body to be suspended between the orifice and the opening in the relief element. When liquid enters the chamber, the body floats upward in the liquid and if the chamber fills with liquid, blocks the opening to prevent the discharge of liquid from the device. Liquid prevented from flowing out of chamber 22, flows back into the fuel tank when fluid is no longer being delivered into the device.

대표청구항 ▼

Apparatus enabling the discharge of vapor therethrough to atmosphere from the headspace of a vehicle fuel tank while preventing the passage of liquid therethrough, and for enabling passage of vapor from the atmosphere therethrough to said headspace, comprising: an enclosed chamber; a first opening i

Apparatus enabling the discharge of vapor therethrough to atmosphere from the headspace of a vehicle fuel tank while preventing the passage of liquid therethrough, and for enabling passage of vapor from the atmosphere therethrough to said headspace, comprising: an enclosed chamber; a first opening in said chamber, said first opening in fluid connection with said headspace; a second opening in said chamber, said second opening in fluid connection with atmosphere; an orifice in said chamber, said orifice disposed between said first and second openings; a movable body in said chamber, said body configured to block said second opening when disposed adjacent thereto, and wherein said movable body floats in said liquid; a retainer in said chamber extending between said second opening and said orifice, said retainer having an interior area, said body movable in said interior area of said retainer between an undisplaced position adjacent said orifice and a blocking position abutting said second opening, and wherein said retainer prevents movement of said body in a traverse direction from said orifice and directs said body into centered relation with said orifice when said body moves adjacent thereto; wherein when vapor flows through said chamber from said first opening to said second opening, vapor flow through said orifice produces an attractive force holding said body away from said second opening.