Receptacles – High-pressure-gas tank – With removable closure
Patent
1994-07-14
1999-09-21
Castellano, Stephen J.
Receptacles
High-pressure-gas tank
With removable closure
220614, 220622, 220623, B65D 804
Patent
active
059542225
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention relates to a fluid storage tank. The fluid storage tank is used to store fluid which is under pressure.
The fluid storage tank of the present invention may be used as the hot water storage tank in a hot water system. The hot water system may, for example, be a solar, gas or electric hot water system. The fluid storage tank of the present invention may be used in other applications in which fluid is stored under pressure in a tank or similar container, eg water filters, fire extinguishes, and gas cylinders.
FIELD OF THE INVENTION
Fluid storage tanks used to store fluid under pressure may deteriorate over time.
In fluid storage tanks used in hot water systems, deterioration generally occurs to the lining inside such tanks which is in contact with the fluid stored in the tank. However, due to the structure of conventional tanks when this deterioration occurs to the lining, the entire tank must be replaced.
In contrast the present invention provides a fluid storage tank in which only the liner needs to be replaced if it deteriorates. In this way the fluid storage tank of the present invention is recyclable or renewable.
The present invention provides a fluid storage tank which may also be used in other applications in which fluid is stored under pressure to provide a fluid storage tank which is recyclable or renewable.
SUMMARY OF THE PRESENT INVENTION
In accordance with one aspect of the present invention there is provided a water heater tank comprising: a cylindrical shell, closed at each of its two ends by a releasable and removable curved end wall concentric with and sealingly engaged within said cylindrical shell wall thereby to enclose an interior volume in which to store hot water; a cylindrical liner, separable from the shell, extending at least substantially between the two ends of the shell and conforming there-through with the inside surface of the shell; an end wall support member adapted to restrain each end wall against movement induced by a force acting upon it as a result of above-atmospheric pressure in the tank interior volume, the end wall support member including both a central portion and a flange portion, the end wall support member central portion being concentric with both the end wall and the cylindrical shell, the end wall support member central portion conforming at least substantially with a surface of a central portion of the end wall facing away from the tank interior volume, while the flange portion extends from the periphery of the end wall support member central portion in a direction both away from the end wall at the other end and parallel to and conforming with the cylindrical shell wall; retention means to retain each end wall support member in juxtaposition with a respective one of the ends of the cylindrical shell, the retention means being cooperative between the flange portion of the end wall support member and a portion of the cylindrical shell wall to which it conforms; wherein each end wall includes (a) a curved end wall center at least substantially conforming with the central portion of a respective cooperative one of the end wall supporting members and (b) a flange, coterminous with the periphery of the end wall center and extending in a direction toward the end wall at the other end of the cylindrical shell wall, the end wall flange having a diameter to fit closely within the cylindrical shell wall and adjacently conforming liner and having sufficient flexibility in a radial outward direction to increasingly compress, in response to increasing internal pressure in the tank, a circumferentially extending seal means cooperative between the end wall flange and the adjacent liner means supported by the cylindrical shell wall.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partly cross-sectional elevation view of a first embodiment of a fluid storage tank in accordance with the present invention;
FIG. 2 is a partly cross-sectional elevation view of the cover region of the fluid storage tank shown in FIG. 1;
FIG. 3 is a perspec
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Morris Peter John
White Garry Rodney
Castellano Stephen J.
Hinds William R.
Morris White PTY Ltd.
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