Patent ID: 7757883
Filing Date: 2010-07-20
Classification: B29C,F17C,Y10T

Abstract:
1. A filament-wound cylindrical pressure vessel having an interior diameter of at least 8 inches which vessel has a port of at least 3 inches in diameter in its sidewall and which vessel is capable of operating at an internal pressure of 150 psig or above, which vessel comprises: a tubular body formed with (a) an innermost layer of a helically wound band of resin-impregnated strands of filamentary material, which innermost layer extends from end to end of said tubular body, (b) an annular reinforcement belt located along an axial section of the outer surface of said innermost layer, which belt is formed by bands of a bandwidth of at least about 3.3 inches that create at least 7 essentially complete layers, each of which layers has an axial length less than the previous layer thereof, the axial length of said reinforcement belt being at least about twice said interior diameter and (c) at least first and second essentially complete, outer layers formed of helically wound bands of resin-impregnated strands of filamentary material which bands have a bandwidth of at least about 4 inches, said first layer being disposed upon outer surfaces of said reinforcement belt and said innermost layer, and both said outer layers extending for the length of said tubular body, all said layers being integrally joined to one another as a result of the occurrence of the substantially simultaneous solidification of said resin which impregnates said strands, at least one aperture which extends through the sidewall of said pressure vessel and is located in said reinforcement belt, and a side port fitting having a diameter of about 3 inches or greater disposed in said aperture.