Fluid metering displacement device, method and system

Details Fluid metering displacement device, method and system Fluid metering displacement device, method and system

G - Physics

01

F

73/124, 26/201,

G01F 1/38 (2006.01) B01L 3/02 (2006.01) F04B 43/073 (2006.01) G01F 11/08 (2006.01)

Patent

CA 1061596

ABSTRACT A fluid displacement device, and method for making and using same in a system for dispensing a measured quantity of fluid. The device comprises two fluid receiving chambers separated by a flexible diaphragm which is movable between the wall surfaces of the chambers upon a suitable change of pressure within either cavity. The device is incorporated into a liquid sampling system including a throttling mechanism and a valve for controlling the flow of pressure or vacuum to the volume displacement device. The method utilized by the liquid sampling system includes the steps of operating the volume displacement device to draw a first volume of fluid into the system, and then operating the volume displacement device to push out a larger second volume of fluid which includes the first volume and can include a subsequent volume of air for cleaning the system of residue of the first volume of fluid.

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