Cornelius, Inc.

Lucy Ann Sheldon

Daniel Peterson Godfrey

Richard John Nighy

Sam Gilbert Willis

Nicholas Martin Broadbent

A pump driver, a disposable pump cartridge for use with the pump driver and a beverage dispenser employing the pump drive are disclosed. The disposable pump cartridge comprises at least one barrelhaving an inlet valveand an outlet valveassociated therewith. A pistonmovable within the barrelis retained in a minimum volume position during transit by a protrusionon the internal surface of the barrel. The pistonhas a piston shaftwith a hollow end arranged, in use, to releasably engage a piston driver to drive the pistonfrom its minimum volume position to an operative position, and to reciprocate the pistonwithin the barrelin its operative position to draw fluid into and pump fluid from the barrelvia the inlet valveand outlet valverespectively. Methods of engaging, disengaging and changing the disposable pump cartridge are also disclosed.

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Cambridge, United Kingdom

Lucy Ann Sheldon