Variable density heat engine

Details Variable density heat engine Variable density heat engine

1976-05-06

1977-06-07

Ostrager, Allen M.

Power plants

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

Mass is a solid

310 4A, 60641, F03G 706

Patent

active

040274799

ABSTRACT:
A heat engine employs an endless belt including a number of discrete elements which will interact with a force field, and are interconnected by a shape memory material, such as Nitinol. Two portions of the belt are maintained at different temperatures and the belt is constrained to move the elements in a continuous path into a field attracting the elements at the hot portion and out of the field at the cold portion. The cold portion is stretched and the hot portion contracts to maintain a condition of higher element density on the portion entering the field and thus a net force drives the belt about a pulley mounted on a power takeoff shaft.

REFERENCES:
patent: 3316415 (1967-04-01), Taylor
patent: 3321908 (1967-05-01), Katchalsky
patent: 3403238 (1968-09-01), Buehler

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