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Patent 3,292,365
Patented Dec. 20, 1966

Power conversion apparatus and method utilizing gravitational and buoyant forces.
Invented by Dan K. McCoin
Filed July 9, 1965



      This is an interesting free energy patent. But would or could it work? Mr. Dan McCoin shows a pair of 25 feet tall vertical chambers connected at top and bottom, containing water and large wooden balls 4.8 ft. (57.6 inches) in diameter. These balls would each weigh about 2900 pounds. The whole apparatus would be 36 feet high. In one vertical chamber near the bottom is an "energy extraction valve" which he describes how it functions, but only very briefly how it is constructed. He shows three pumps, which maintain pressures needed in three areas for the device to work. These pumps do not make the device run, they only maintain the pressure conditions. The pressures keep one chamber full of water and the other chamber void of water. The valve separates the two pressure areas. This valve is the most important part of the whole invention. It is described, as being made of rubber and cloth, like some type of bladder and is pressurized, and about 2 feet thick. This valve is forced open by a falling ball as the ball passes thru the valve. The valve absorbs the kinetic energy of the falling ball and transmits the energy pulse to do useful work. The valve also maintains a barrier between the pressures in the two chambers. For clarity in my drawing shown here, I have omitted the pumps and expansion chamber.

      The big question concerns the valve. Can it be made such that a one and a half ton ball can pass thru from above, and still hold back the pressure from below? And not be ripped to pieces? And capture the inertial energy of the falling ball? And transmit that energy pulse to do useful work? First, what speed is the ball moving after falling sixteen feet? How much inertial energy would it contain as it hits the valve? When the ball is in the middle of the valve, there is about 10.8 pounds per square inch of pressure on the ball. With a 4.8 foot diameter ball this works out to about 28000 pounds of force that the ball must over come as it passes thru the valve. How much of the inertial energy would be needed to overcome this pressure? Would there be any energy left to be transmitted out thru the fluid of the bladder valve? All pressures are ABSOLUTE PSI so the 11.25 PSI is below atmospheric pressure and the 32 PSI is really only about 16 PSI relative to the atmosphere. Would water boil at 0.4 PSI?

      So, is this theororetically possible? And just how would that dang valve be made? Can this be scaled down so that it fits in my basement? Eighteen inch balls would weigh about 88 pounds. Using a square chamber would allow fluid to pass by the balls thru the corners.

      Here are low resolution pictures of US Patent number 3,292,365 page 1   page 2   page 3   page 4   page 5   page 6   page 7


      Send comments to jrrandall@voyager.net

May 29, 2003
James R. Randall
Researcher and Inventor
Stockbridge, Michigan USA