Patent ID: 7137409

Claim:
A multilayered pressure vessel, comprising: at least one single ply sheet of flexible material ( 100 ) having an approximate longitudinal midline (M) dividing said sheet of flexible material into an inner portion ( 130 ) having an inner surface ( 190 ), an outer surface ( 180 ), an edge ( 195 ), a seam allowance ( 200 ), and a width ( 140 ), and an outer portion ( 110 ) having an inner surface ( 160 ), an outer surface ( 160 ), an edge ( 165 ), a seam allowance ( 170 ), and a width ( 120 ), wherein said width of said outer portion is greater than said width of said inner portion; and a primary seam ( 250 ) binding said outer portion and said inner portion to said sheet of flexible material at the approximate midline and proximate said outer portion edge and said inner portion edge; wherein said sheet of flexible material is wrapped into a substantially continuous, approximately 720 degree wrap to form a vessel body in which said outer surface of said outer portion forms the exterior surface ( 150 a ) of said multilayered pressure vessel, said inner surface of said inner portion comprises the innermost interior surface ( 190 a ) of said vessel body, said outer surface of said inner portion and said inner surface of said outer portion are in face-to-face relation, and said seam is concealed by said seam allowance of said outer portion.