Patent ID: 6790010
Filing Date: 2004-09-14
Classification: F04B

Abstract:
A pumping system regulated by gas provided by a gas source, comprising:a cylinder pump to pump and output a liquid regulated by a first driving gas and a second driving gas, wherein the cylinder pump has a gas cavity with a first ventilator and a second ventilator, and a liquid cavity coupled to a liquid source; a first group of switches in communication with the gas source and at least one of said first switches in further communication with the liquid source to enable the cylinder pump to pump the liquid by feeding the gas provided by the gas source as the first driving gas into the cylinder pump through the first ventilator when receiving a first enabling signal; a second group of switches in communication with the gas source and at least one of said second switches in further communication with the liquid source to enable the cylinder pump to output the liquid by feeding the gas provided by the gas source as the second driving gas into the cylinder pump through the second ventilator when receiving a second enabling signal; and a control unit coupled to the first and second groups of switches and the cylinder pump, to control the first driving gas and the second driving gas entering and leaving the cylinder pump and the flow speed of the first driving gas and the second driving gas.