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Rolling diaphragms are nothing new. The shaft connected to the rolling diaphragm projects through the housing (unlike the image shows). You generally pressurize the fluid through the shaft. Creating a vacuum on the fluid can cause the membrane to invert; cycling through full stroke can reset the membrane. The image was captured from https://www....


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Certainly. In the San Francisco bay area there was a huge cylindrical natural gas storage tank which was a huge cylindrical bladder capped off with a conical lid. Gas was pumped into the bladder which caused the lid (which possessed a fixed amount of weight) to rise upwards within a constraining gridwork of girders. the lid rose and fell according to gas ...


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