Two-way shape memory alloy heat engine

Details Two-way shape memory alloy heat engine Two-way shape memory alloy heat engine

1983-09-26

1985-01-01

Ostrager, Allen M.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

F03G 706

Patent

active

044909764

ABSTRACT:
A two-way shape memory alloy, a method of training a shape memory alloy, and a heat engine employing the two-way shape memory alloy to do external work during both heating and cooling phases. The alloy is heated under a first training stress to a temperature which is above the upper operating temperature of the alloy, then cooled to a cold temperature below the zero-force transition temperature of the alloy, then deformed while applying a second training stress which is greater in magnitude than the stress at which the alloy is to be operated, then heated back to the hot temperature, changing from the second training stress back to the first training stress.

REFERENCES:
patent: 4030298 (1977-06-01), Sandoval
patent: 4037411 (1977-07-01), Hochstein
patent: 4325217 (1982-04-01), Goldsteneh

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