Power plants – Motor operated by expansion and/or contraction of a unit of... – Mass is a solid
Patent
1982-07-19
1984-03-06
Ostrager, Allen M.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Mass is a solid
60527, F03G 706
Patent
active
044346182
ABSTRACT:
An engine has at least two piston-cylinder assemblies each comprising a cylinder formed in an engine block with a cylinder head and a piston therein in sliding relationship toward and away from the head, a piston rod operatively connected to the piston and to a crankshaft, motion producing member of shape-memory material, e.g. Nitinol, having a transformation temperature range, secured to the cylinder head and the side of the piston opposite from the connecting rod, the motion producing member having a heat treated high temperature extended shape memory position and a low temperature low energy compressed position, the Nitinol member being of hollow tubular form and having pressure and return hoses connected thereto for supplying and removing cooling fluid into and from the Nitinol member, an electrical heating device connected to the Nitinol member, whereby the Nitinol member is easily compressed with relatively little force from the extended shape memory position to the compressed position when cooling fluid is supplied thereto to reduce the temperature of the Nitinol member to or below the lower limit of the transformation temperature range and the Nitinol member is automatically extended with relatively great force from the compressed position to the shape memory position when heated by the heating device to or above the upper limit of the transformation temperature range.
REFERENCES:
patent: 3937019 (1976-02-01), Renner
patent: 4086769 (1978-05-01), Smith
Flocks Karl W.
Husar Stephen F.
Neimark Sheridan
Ostrager Allen M.
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