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We make tanks that have heavy steel lids. The lids are attached via hinges. As the lid diameters get larger the ability to lift the lid becomes impossible for one person without mechanical assistance. While we could use a davit arm our customers prefer that we design in a counterweight system. We need an engineer to design the proper hinge and counterweight system for our steel tanks. The current project is for a round lid that is 42" in diameter by 1/2" thick carbon steel. The concept is to have a hinge that enables the lid to set on the tank perfectly flat when lowering the lid to the tank. In addition to that we need to add a counterweight to the hinge side that allows the operator to lift the lid up with one finger because all of the work is being done by the counterwieght on the oppostie side of the tank. The counter weight needs to show that the design took into consideration that form can fit function. The resulting design needs to be simple yet show styl...
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