Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1994-03-16
1995-08-22
Michalsky, Gerald A.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137 43, 137587, F16K 3118
Patent
active
054435617
ABSTRACT:
A fuel vapor discharge limiting device for limiting communication between a fuel tank and a fuel vapor discharge pipe for discharging a fuel vapor in the fuel tank. The fuel vapor discharge limiting device includes a first float valve for cutting off the communication between the fuel tank and the fuel vapor discharge pipe when a liquid level in the fuel tank rises near a predetermined full level; a relief valve for allowing the communication between the fuel tank and the fuel vapor discharge pipe when an internal pressure in the fuel tank becomes not less than a predetermined value; and a second float valve for blocking the communication allowed by the relief valve when the liquid level in the fuel tank abnormally rises over the predetermined full level. Accordingly, oversupply of liquid fuel to the fuel tank can be prevented, and the internal pressure in the fuel tank can be maintained always within a predetermined permissible range. Furthermore, discharge of the liquid fuel to the fuel vapor discharge pipe can be prevented.
REFERENCES:
patent: 4781218 (1988-11-01), Mori et al.
patent: 5313978 (1994-05-01), Takaki et al.
Sakata Yoshiyasu
Sugiyama Mitsuo
Honda Giken Kogyo Kabushiki Kaisha
Michalsky Gerald A.
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