Patent ID: 8690073

Claim:
A apparatus, comprising: a first thin film comprising a first substrate and a second substrate, the first substrate having a face in contact with either an insulted medium or at least one hot medium and having another face in contact with a primary fluid; a second thin film comprising a third substrate and a fourth substrate, the third substrate having a face completely in contact with a face of the second substrate and having another face in contact with a secondary fluid; the fourth substrate having a face in contact with the secondary fluid and having another face in contact with either an insulted medium or at least one cold medium; the second substrate having a face in contact with the secondary fluid and having the other face completely in contact with the face opposing the third substrate; a first at least one flexible seal attached to the first substrate and to the second substrate to form first at least one closed enclosure comprising the primary fluid; a second at least one flexible seal attached to the third substrate and to the fourth substrate to form second at least one closed enclosure comprising the secondary fluid; and a rigid rotatable pivot attached to the second and third substrates so that the second substrate and third substrates rotate equally about the rigid rotatable pivot when the pressure of the primary and secondary fluids change.