CPC B65D 88/128 (2013.01) [B65D 90/16 (2013.01)] | 3 Claims |
1. A low profile holding tank evacuable to a pressure differential of at least about 10″ of mercury, said low profile holding tank comprising: at least one support structure, an upper outer layer of mild steel and a lower outer layer of mild steel, each of said upper outer layer and said lower outer layer is configured to be up to about ¼ inches thick and a peripheral wall, said upper outer layer, said lower outer layer and said peripheral wall cooperate to define a space, said at least one support structure is connected to said upper outer layer at an upper connection point and said at least one support structure is connected to said lower outer layer at a lower connection point, wherein at least one of said upper connection point and said lower connection point is made from outside of said space to prevent damages incurred on said low profile holding tank by repeated applications of the pressure differential of at least about 10″ of mercury.
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