Patent ID: 6186745
Filing Date: 2001-02-13
Classification: F04F

Abstract:
A multi-chamber liquid pump comprising:an input chamber having a means for inputting liquid thereinto;an intermediate chamber;a liquid output chamber having a means for outputting liquid therefrom;a first liquid flow control valve being engaged between said input chamber and said intermediate chamber;a second liquid flow control valve being engaged between said intermediate chamber and said output chamber;a pressurized gas source being engaged to said output chamber to provide pressurized gas into said output chamber to output liquid from said output chamber;said pressurized gas source being engaged to said intermediate chamber to provide pressurized gas to said intermediate chamber; anda pump controller being operable to control the flow of pressurized gas into and out of said intermediate chamber to control the flow of liquid from said input chamber into said intermediate chamber and from said intermediate chamber into said output chamber.