Disclosed is a liquid storage system having an outer tank (e.g. an aircraft fuel tank) for containing a liquid (e.g. aircraft fuel), the outer tank enclosing a liquid storage space; an inner tank located within the outer tank and enclosing the liquid storage space; and at least one coupling element
Disclosed is a liquid storage system having an outer tank (e.g. an aircraft fuel tank) for containing a liquid (e.g. aircraft fuel), the outer tank enclosing a liquid storage space; an inner tank located within the outer tank and enclosing the liquid storage space; and at least one coupling element associated with the outer tank and the inner tank for maintaining the tanks in a spaced apart relationship; wherein the coupling element(s) is/are deformable such that, on application of a force to the inner tank, at least part of the inner tank moves relative to the outer tank.
대표청구항▼
1. A liquid storage system comprising: an outer tank for containing a liquid, said outer tank enclosing a liquid storage space;an inner tank located within the outer tank and enclosing the liquid storage space; andspacing means associated with the outer tank and the inner tank for maintaining said t
1. A liquid storage system comprising: an outer tank for containing a liquid, said outer tank enclosing a liquid storage space;an inner tank located within the outer tank and enclosing the liquid storage space; andspacing means associated with the outer tank and the inner tank for maintaining said tanks in a spaced apart relationship; whereinthe spacing means are deformable such that, on application of a force to the inner tank, at least part of the inner tank moves relative to the outer tank;the inner tank comprises:a first portion comprising a first base wall and first side walls extending from the first base wall, the first side walls surrounding a first opening opposite to the first base wall; anda second portion comprising a second base wall and second side walls extending from the second base wall, the second side walls surrounding a second opening opposite to the second base wall; andthe first portion and the second portion are coupled to the outer tank by respective deformable spacing means such that the first and second portions may move independently from each other. 2. The liquid storage system according to claim 1, wherein the second portion is located within the first portion such that the second opening is located at or proximate to the first base wall and such that the first opening is located at or proximate to the second base wall. 3. The liquid storage system according to claim 1, wherein the inner tank conforms substantially to the shape of the outer tank, and the spacing means maintains the tanks in a spaced apart parallel relationship so as to form an annular space between the tanks. 4. The liquid storage system according to claim 1, wherein the spacing means are elastic such that, if the inner tank moves relative to the outer tank, the inner tank is returned to its original position with respect to the outer tank. 5. The liquid storage system according to claim 1, wherein the inner tank is made of one or more materials selected from the group of materials consisting of: carbon fibre composite material, aluminum, plastic, and a material comprising aramid or para-aramid fibres. 6. The liquid storage system according to claim 1, wherein walls of the inner tank are rigid. 7. The liquid storage system according to claim 1, wherein: one or more walls of the inner tank comprises:a first wall; anda second wall;wherein the first and second walls of the inner tank are spaced apart to define therebetween at least one chamber. 8. The liquid storage system according to claim 1, wherein the inner tank is made of a permeable or semi-permeable material such that a liquid stored in the liquid storage system may flow through walls of the inner tank. 9. The liquid storage system according to claim 1, wherein the inner tank comprises one or more holes or perforations for allowing the flow of a liquid stored in the liquid storage system therethrough. 10. The liquid storage system according to claim 1, wherein a total cavity volume of the inner tank and the spacing means in the outer tank is less than or equal to 15% by volume of a volume within the outer tank. 11. The liquid storage system according to claim 1, wherein the outer tank is an aircraft fuel tank. 12. A vehicle comprising a liquid storage system for containing a liquid, the liquid storage system being in accordance with claim 1. 13. The vehicle according to claim 12, wherein the vehicle is an aircraft and the outer tank is an aircraft fuel tank. 14. The vehicle according to claim 13, wherein the outer tank is formed, at least in part, by an external skin of the aircraft. 15. A method of providing a liquid storage system, the method comprising: providing an outer tank for containing a liquid, said outer tank enclosing a liquid storage space;positioning an inner tank within the outer tank, the inner tank enclosing the liquid storage space; andpositioning spacing means between the outer tank and the inner tank so as to maintain said tanks in a spaced apart relationship; whereinthe spacing means are deformable such that, on application of a force to the inner tank, at least part of the inner tank moves relative to the outer tank;the inner tank comprises:a first portion comprising a first base wall and first side walls extending from the first base wall, the first side walls surrounding a first opening opposite to the first base wall; anda second portion comprising a second base wall and second side walls extending from the second base wall, the second side walls surrounding a second opening opposite to the second base wall; andthe first portion and the second portion are coupled to the outer tank by respective deformable spacing means such that the first and second portions may move independently from each other.
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