主权项 |
1. A filament wound pressure shell defined by a generally annular sidewall, said shell having a first end, a second end, and a longitudinal axis extending between the first end and the second end, said sidewall being generally symmetrical around the longitudinal axis, said first end being opposite from the second end,
said sidewall having a first generally cylindrical section positioned at the first end and defining a shell first end opening, a second generally cylindrical section positioned at the second end and defining a shell second end opening, and a third generally cylindrical mid section positioned between the first end and the second end, said mid section having a larger inside diameter than the first end section and the second end section, a first end, and a second end, a first generally frustoconical section connecting the first end section to the first end of the mid section, and a second frustoconical section connecting the second end section to the second end of the mid section, said generally cylindrical sections having generally cylindrical inside and outside surfaces, and said generally frustoconical sections having generally frustoconical inside and outside surfaces. |