PURPOSE: To retrieve energy effectively by supplying high temperature fluid and low temperature fluid alternately into the hollow part of a coil-shaped spring member of shape memory alloy.
CONSTITUTION: The spring member 1, formed into a hollow, tubular and coiled shape, is formed by the shape memory alloy. A high temperature fluid supplying pipe 6 and a low temperature fluid supplying pipe 7 are connected to the lower end of hollow part of the spring member 1 through valves 8, 9 respectively while the high temperature fluid and the low temperature fluid are supplied into the spring member 1 alternately by switching the valves 8, 9 alternately. The shape of the spring member 1 is changed to the shape upon the high temperature and the shape upon the low temperature repeatedly, therefore, an oscillating board 4 oscillates up-and-down in accordance with the change of the motion of the oscillating board 4 and the oscillating force thereof is transmitted to an energy generating means 12 through a connecting rod 15 and a flywheel 14.
TAZAKI MUNETAKA
WAKIYAMA SHIGERU
NOZUNA YOSHIAKI
HIRATA MORIO
