Patent ID: 6988508

Claim:
A pneumatic open- and closed-loop control apparatus ( 10 ), comprising: an inlet conduit ( 14 ) subjected to a pressure fluid; first and second outlet conduits ( 16 , 18 ); and a venting conduit ( 30 ) and a movable valve piston ( 90 ), mounted in a valve chamber ( 92 ) and mediating between the conduits, wherein by means of a slide element ( 12 ), connected to the pneumatically driven valve piston ( 90 ), the first outlet conduit ( 16 , 18 ) of the pneumatic open- and closed-loop control apparatus ( 10 ) is connected in alternation with one inlet conduit ( 14 ), and at the same time the second outlet conduit ( 18 , 16 ) is connected to the venting conduit ( 20 ) of the apparatus ( 10 ), wherein the one inlet conduit communicates with a small compressor ( 78 ) and the outlet conduits ( 32 , 48 ) each communicate with a respective container ( 24 , 42 ), and wherein the compressor ( 78 ) on a side toward the inlet conduit is switchable by means of a pressure sensor ( 84 ) mounted in a connecting means ( 86 ).