FIELD: materials handling facilities; lifting mechanisms. SUBSTANCE: piston 2 installed in housing 1 is sealed relative to housing. Housing 1 is filled with medium 3 featuring high volumetric expansion coefficient at heating. Housing 1 is enclosed in hood 4, and space 5 is placed in communication with higher temperature medium supply source. Electric heating members 7 can be secured on side surface of housing 1. EFFECT: enlarged operating capabilities. 3 cl, 1 dwg
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