Patent ID: 6802242
Filing Date: 2004-10-12
Classification: F15B

Abstract:
A pneumatic control system for positioning a piston within a cylinder having first and second ends, the system manipulating a flow of compressed air such that the position of the piston may be regulated, the system comprising:a compressed air source for providing compressed air to the pneumatic control system; a positioner fluidly connected to the compressed air source for regulating the flow of compressed air into and out of the first and second ends; a normally closed directional valve fluidly connected to the positioner and to the compressed air source, the directional valve configured to open at a preset pressurization level of the compressed air for enabling the flow thereof to pass between the positioner, the compressed air source, and the cylinder; first and second large boosters fluidly connected to and interposed between the directional valve and respective ones of the first and second ends for supplying compressed air thereto; first and second small boosters fluidly connected in series to respective ones of first and second quick exhaust valves interposed between the directional valve and respective ones of the first and second ends for collectively exhausting compressed air therefrom; first and second small booster check valves fluidly connected to and interposed between the directional valve and respective ones of the first and second small boosters, the first and second small booster check valves being oriented such that the flow of compressed air away from the directional valve is blocked; and first and second large booster check valves fluidly connected to and interposed between the directional valve and respective ones of the first and second large boosters, the first and second large booster check valves being oriented such that the flow of compressed air towards the directional valve is blocked.