FLUID INJECTION SYSTEM PUMP AND PUMPING METHODS

摘要

A cassette (18) containing a group of sealed cells is used as a means for delivering doses of fluid to be injected into a sterilizing chamber (10). After the cassette (18) is automatically positioned over a piercing mechanism, the cassette (18) is moved downwardly so that a cell is pierced. Fluid is then forced out of the cell by pneumatic pressure into an injector valve (22), which opens in a manner which does not adversely affect a vacuum within the chamber (10).