Patent ID: 8430237

Claim:
A tank device for storing hydrogen for an aircraft, wherein the tank device comprises: an outer tank; an inner tank; wherein the inner tank is held in the outer tank; wherein the outer tank is configured to store hydrogen with first physical characteristics; wherein the inner tank is configured to store hydrogen with second physical characteristics; wherein the inner tank is configured to store hydrogen with a lower pressure and a higher temperature than the pressure and the temperature of the hydrogen in the outer tank; wherein the outer tank is connected to the inner tank and is configured to feed the hydrogen from the outer tank to the inner tank; and a conversion contrivance configured to convert the hydrogen with the first physical characteristics from the outer tank to hydrogen with the second physical characteristics and to feed the converted hydrogen to the inner tank; wherein the inner tank is configured to feed the hydrogen with the second physical characteristics from the inner tank to a consumer; wherein the outer tank comprises a first insulation layer; and wherein the inner tank comprises a second insulation layer.