PNEUMATIC JACK Russian patent published in 1997 - IPC

FIELD: mechanical engineering; devices for lifting, transporting or pushing of loads; pneumatic jacks which can be used in confined space at rescue and salvage operations. SUBSTANCE: pneumatic jack has inner envelope 1 connected with sour of working medium through check valve 2. Edges of envelope are hermetically closed and interconnected by screw connection by means of two metal plates 3 and screws 4. Outer envelope 5 is fitted onto inner envelope from top. Outer envelope is closed at end faces by any known connections, for instance, lacing. EFFECT: enlarged operating capabilities. 6 cl, 1 dwg