Power plants – Motor having a buoyant working member – With means to vary buoyancy of working member
Patent
1979-01-05
1980-06-17
Geoghegan, Edgar W.
Power plants
Motor having a buoyant working member
With means to vary buoyancy of working member
60497, 60503, 60327, 290 1R, 290 52, 417337, F03C 100
Patent
active
042077419
ABSTRACT:
An hydraulic motor having as an energy source a cyclically controlled rising and falling level of liquid in a working tank in which is provided a piston element having a liquid-tight hollow chamber that is arranged to move vertically with the rising and falling liquid level in response to buoyant and gravitational forces acting thereon. The liquid level in the tank is varied by using a plurality of liquid-tight exchange receptacles located adjacent the tank in vertically spaced relationship between the lower and upper liquid levels in the tank, with each exchange receptacle communicating with the tank through an opening including a normally closed valve. A control means for varying the liquid level in the tank includes a system for sequentially and individually opening and closing each of the valves from the uppermost to the lowermost exchange receptacle, and vice versa. A quantity of liquid is exhausted from the working tank during each cycle of operation and a like quantity of make-up liquid is applied to the tank, the quantity of exhausted liquid being substantially smaller than the volume of the working tank. The piston chamber may selectively be filled with liquid from the tank during each cycle to increase the mass of the piston during its descent, and the liquid may be drained from the piston to increase its positive buoyancy during its ascending stroke. A system is disclosed for hydraulically locking the piston at its end of stroke positions.
REFERENCES:
patent: 1264754 (1918-04-01), Bird
patent: 1364619 (1921-01-01), Dolliver
patent: 1451580 (1923-04-01), Lindenberg
patent: 1496470 (1924-06-01), Knowlton
patent: 3084905 (1963-04-01), Salzer
patent: 4083186 (1978-04-01), Jackson
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