Patent ID: 8668108
Filing Date: 2014-03-11
Classification: F17C,Y02E

Abstract:
1. A pressure vessel comprising: a composite shell; a metallic boss defining a port in the composite shell and comprising a neck and an outwardly extending flange; and an interface element disposed between the composite shell and the boss, the interface element being in contact with the composite shell and in contact with the boss, the interface element neither being bonded to the composite shell nor to the boss, thereby allowing for movement between the interface element and the composite shell and allowing for movement between the interface element and the boss, the interface element comprising a neck disposed adjacent the neck of the boss, the interface element comprising a skirt disposed adjacent the flange of the boss, the interface element consisting essentially of a material selected from the group consisting of a polymer, an elastomer, and a thermoplastic, and the interface element having an elastic modulus that is greater than about 250 psi and less than about 10 Mpsi.