Patent ID: 8596038

Claim:
A vapor jet emitting device including a liquid propellant tank storing a liquid propellant, for producing thrust by emitting a jet of vapor of the liquid propellant supplied from the liquid propellant tank and produced by evaporation of part of the liquid propellant, the liquid propellant tank includes: a tank body for storing the liquid propellant, and, a plurality of holder plates arranged inside the tank body to cause the liquid propellant to adhere to them by surface tension, thereby establishing, inside the tank body, a liquid propellant holding area in which the liquid propellant is held and a gas accumulation area in which vapor produced by evaporation of part of the liquid propellant accumulates, the tank body has a propellant inlet opening into the liquid propellant holding area and a gas outlet for supplying the vapor to an external location from the gas accumulation area, the gas outlet is connected to a thruster for emitting a jet of the vapor produced inside the tank body and supplied via the gas outlet, and a gas supply line connecting between the tank body and the thruster is kept at higher temperature that temperature inside the tank body.