FIELD: mechanical engineering.
SUBSTANCE: device comprises cylinders with pistons covered by lids from one side, mechanism of gas distribution having normally open inlet valves and exhaust ports, and branch pipes for supplying and discharging air. The open sides of the cylinders are connected with the solid lid provided with opening and seal for the rod that connects the pistons. The side of the cylinder are provided with normally closed inlet and outlet valve.
EFFECT: simplified structure and reduced metal consumption.
3 cl, 5 dwg
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