Patent ID: 7337538

Claim:
A method for reversibly coupling a pumping cartridge to a reusable pump drive system, the method comprising: providing the reusable pump drive system with a first pumping cartridge retaining component configured and positioned to enable it to engage a first portion of the cartridge, the first pumping cartridge retaining component being adjustable between a retaining position and a non-retaining position; providing a driveshaft of the reusable pump drive system with a second pumping cartridge retaining component configured and positioned to enable it to engage a second portion of the cartridge comprising a portion of a piston shaft of the pumping cartridge, the second pumping cartridge retaining component being adjustable between a retaining position and a non-retaining position; preparing the pumping cartridge for connection to the reusable pump drive system by placing a piston of the pumping cartridge in a selected position relative to a cylinder of the pumping cartridge; inserting the pumping cartridge into the reusable pump drive system; adjusting the first and second pumping cartridge retaining components to their non-retaining positions; and moving at least one of the first and second pumping cartridge retaining components to its retaining position.