Solid state engine with alternating motion

Details Solid state engine with alternating motion Solid state engine with alternating motion

1980-01-21

1982-04-20

Ostrager, Allen M.

Power plants

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

Mass is a solid

F03G 706

Patent

active

043252176

ABSTRACT:
Heat energy is converted to mechanical motion utilizing apparatus including a cylinder, a piston having openings therein reciprocable in the cylinder, inlet and outlet ports for warm water at one end of the cylinder, inlet and outlet ports for cool water at the other end of the cylinder, gates movable with the piston and slidably engaging the cylinder wall to alternately open and close the warm and cool water ports, a spring bearing against the warm water side of the piston and a double helix of a thermal shape memory material attached to the cool end of the cylinder and to the piston. The piston is caused to reciprocate by alternately admitting cool water and warm water to the cylinder.

REFERENCES:
patent: 3665705 (1972-05-01), Christensen
patent: 3830060 (1974-08-01), Jedlicka et al.
patent: 3913326 (1975-10-01), Banks
patent: 3937019 (1976-02-01), Renner
patent: 4027479 (1977-06-01), Cory
patent: 4041706 (1977-08-01), White
patent: 4086769 (1978-05-01), Smith
patent: 4087971 (1978-05-01), Hart
Golestanch, "Efficiency of the Solid-State Engine Made with Nitinol Memory Material", Journal Applied Physics 49(3), Mar. 1978.
Wang and Buchler, "Additional Unique Property Changes Observed During TiNi Transition," Applied Physics Letter, vol. 21, No. 3, Aug. 1972.
Acta Mettallurgica, vol. 25, pp. 1315-1321.

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