Fuel tank assembly for volatile fuel

A fuel tank assembly for containing a supply of volatile fuel and deterring the formation of fuel vapor within the fuel tank assembly as fuel is withdrawn from and replenished to the supply in the fuel tank assembly, the fuel tank assembly comprising:

• a collapsible container having a highly compliant wall movable between an expanded configuration and a collapsed configuration so as to follow and conform closely to the supply of volatile fuel within the container as the fuel is withdrawn from and replenished in the supply;
• the wall having a composite construction including a fluid filler material contained within a highly flexible envelope such that the composite construction of the wall enables expansion of the container toward the expanded configuration in response to the replenishment of fuel in the container to conform to and contain the supply of volatile fuel, and enables collapse of the container in response to the withdrawal of fuel from the container, toward the collapsed configuration, with the wall continuously and closely conforming to the supply of fuel within the container as fuel is withdrawn from and replenished within the container, thereby deterring the formation of fuel vapor within the fuel tank assembly;
• the highly flexible envelope including an inner member of highly flexible synthetic polymeric material for containing the supply of volatile fuel, and an outer member of highly flexible synthetic polymeric material surrounding the inner member for containing the fluid filler material between the inner and outer members;
• the fluid filler material comprising a liquid filler material.

A fuel tank assembly for containing a supply of volatile fuel and deterring the formation of fuel vapor within the fuel tank assembly as fuel is withdrawn from and replenished to the supply in the fuel tank assembly, the fuel tank assembly comprising:

• a collapsible container having a highly compliant wall movable between an expanded configuration and a collapsed configuration so as to follow and conform closely to the supply of volatile fuel within the container as the fuel is withdrawn from and replenished in the supply;
• the wall having a composite construction including a fluid filler material contained within a highly flexible envelope such that the composite construction of the wall enables expansion of the container toward the expanded configuration in response to the replenishment of fuel in the container to conform to and contain the supply of volatile fuel, and enables collapse of the container in response to the withdrawal of fuel from the container, toward the collapsed configuration, with the wall continuously and closely conforming to the supply of fuel within the container as fuel is withdrawn from and replenished within the container, thereby deterring the formation of fuel vapor within the fuel tank assembly;
• the fuel tank assembly including an outer housing, and the collapsible container being placed within the outer housing, the outer housing comprising a relatively rigid housing member surrounding the collapsible container;
• the highly flexible envelope including an inner member of highly flexible synthetic polymeric material for containing the supply of volatile fuel, and an outer member of highly flexible synthetic polymeric material surrounding the inner member for containing the fluid filler material between the inner and outer members;
• the fluid filler material comprising a liquid filler material.