PNEUMATIC DRIVE SYSTEM Russian patent published in 2010 - IPC F15B11/64 F15B11/42 

FIELD: machine building.

SUBSTANCE: system is intended for moving the working member from one position to another. In pneumatic system (1) of drive the movement of driven assembly (7) of pneumatic drive (2) is controlled by means of distributing valves (25, 26) connected to working chambers (12, 13) of pneumatic drive (2). Distributing valves (25, 26) include at least one position (30) of economic air flow, and position (29) of high force, which sets bigger cross section of flow relative to the previous one. Owing to control devices (36, 37) the fact that distributing valves (25, 26) depending on air pressure at least in one working chamber (12, 13) are switched from general position (30) of economic air flow to position (29) of high force is reached if outlet part of driven assembly (7) of mechanism endures increased resistance at its movement.

EFFECT: air flow economy.

15 cl, 1 dwg