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Title: Solid state engine with alternating motion

Patent ·
OSTI ID:864176

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 4325217
OSTI ID:
864176
Country of Publication:
United States
Language:
English