System for preventing loss of fuel due to evaporation

Claim 1

A system for preventing loss of liquid fuel due to evaporation comprising: a casing accommodating a fuel gas absorbent and provided with a tank port in its upper portion communicating with a liquid fuel tank; a passage defined in said casing and providing a communication between said tank port and said absorbent; a separator chamber disposed in said passage, said passage being so constructed as to permit only the gaseous phase of the fuel to flow towards said absorbent; and a heat transmitting wall separating said absorbent from any liquid fuel in said chamber, said wall being adapted to enhance the vaporization of any such fuel by the heat of absorption developed in said absorbent.

Claim 2

A system for preventing loss of liquid fuel due to evaporation comprising: a casing accommodating a fuel gas absorbent and provided with a tank port in its upper portion communicating with a liquid fuel tank; a passage defined in said casing and providing a communication between said tank port and said absorbent; a separator chamber disposed in said passage, said passage being so constructed as to permit only the gaseous phase of the fuel to flow towards said absorbent; and a heat transmitting wall separating said absorbent from any liquid fuel in said chamber, said wall being adapted to enhance the vaporization of any such fuel by the heat of absorption developed in said absorbent.

Claim 3

A system for preventing loss of liquid fuel due to evaporation comprising: a casing accommodating a fuel gas absorbent and provided with a tank port in its upper portion communicating with a liquid fuel tank; a first passage defined in said casing and providing a communication between said tank port and said absorbent; a separator chamber disposed in said first passage, said first passage being so constructed as to permit only the gaseous phase of the fuel to flow towards said absorbent; a second passage provided in the bottom of said separator chamber and opening in a portion isolated from said absorbent; a float valve normally closing the opening of said second passage, said float valve being adapted to open said second passage when a predetermined liquid level is reached in said separator chamber; and a heat transmitting wall separating said absorbent from any liquid fuel in said chamber, said wall being adapted to enhance the vaporization of any such fuel by the heat of absorption developed in said aborbent.

Claim 4

A system for preventing loss of liquid fuel due to evaporation comprising: a casing accommodating a fuel gas absorbent and provided with a tank port in its upper portion communicating with a liquid fuel tank; a first passage defined in said casing and providing a communication between said tank port and said absorbent; a separator chamber disposed in said first passage, said first passage being so constructed as to permit only the gaseous phase of the fuel to flow towards said absorbent; a second passage provided in the bottom of said separator chamber and opening in a portion isolated from said absorbent; a float valve normally closing the opening of said second passage, said float valve being adapted to open said second passage when a predetermined liquid level is reached in said separator chamber; and a heat transmitting wall separating said absorbent from any liquid fuel in said chamber, said wall being adapted to enhance the vaporization of any such fuel by the heat of absorption developed in said aborbent.