Float valve for fuel tank

Details Float valve for fuel tank Float valve for fuel tank

1995-04-21

1996-11-26

Michalsky, Gerald A.

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137 43, 137587, F16K 3118

Patent

active

055775268

ABSTRACT:
A float valve for a fuel tank, which comprises an upper float chamber, a middle chamber, and a lower float chamber housed in a case that is fixed to the upper wall of a fuel tank. The upper float chamber includes a first communication hole that directly communicates with an air bleed duct. The upper float that can block that first communication hole when the tank is full. The middle chamber includes a third communication hole communicating with the lower float chamber which has a first air hole located at a position corresponding to the desired fuel level for a full tank. The lower float chamber includes a lower float than can block the third communication hole, and a second air hole which is located bellow the lower float. Because the air passages and float activation allow air to be vented as the fuel level rises in the tank fueling proceeds smoothly and drastic increases in internal pressure, that will stop fueling prematurely can be avoided.

REFERENCES:
patent: 4000828 (1977-01-01), Crute et al.
patent: 4679581 (1987-07-01), Mears
patent: 4905726 (1990-03-01), Kasugai et al.
patent: 4913303 (1990-04-01), Harris
patent: 5028244 (1991-07-01), Szlaga
patent: 5156178 (1992-10-01), Harris
patent: 5443561 (1995-08-01), Sakata et al.

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