Split tank closure and diaphragm assembly

DETAILED DESCRIPTION The present invention is an improvement of such prior art devices.
A filament wound non-metallic pressure vessel is provided which minimizes the problem of premature bag failure by providing a contour molded heavy gauge butyl rubber diaphragm within a pressure vessel formed by cup shaped tank liners or shelves.
An assembly ring provides a pressuretight joint between the diaphragm and the sidewall of the one of the liners and provides a seal with respect to the other liner.
The assembly comprising the cup shaped liners and the assembly ring provides a smooth exterior surface which may be filament wound employing conventional winding techniques.
The assembly ring enables the tank to be assembled in a simplified manner and in such a way that the seals may be inspected during assembly to assure the assembler that a properly sealed tank will result.
Furthermore, the assembler is able to inspect the interior of the tank for foreign objects during the assembly operation.