Single stroke fluid dispense system

A single stroke fluid dispense system for dispensing the contents of a collapsible rupturable plastic container of fluid, comprising:

• an elongate hollow dispense cylinder having a dispense end, an actuation end opposite said dispense end, and an internal cylindrical wall defining an elongate cylindrical passage;
• a closure cap supported over said dispense end of said dispense cylinder, said closure cap and said internal cylindrical wall defining a container well for receiving the container of fluid, said closure cap further including a rupture port defining one end of a fluid passageway through said closure cap in fluid communication with said container well;
• an internal piston mounted for sliding engagement with said internal cylindrical wall and extendable through said container well;
• a ram apparatus operable against said internal piston to move said internal piston towards and away from said closure cap;
• and
• a sealing piston assembly to carry said dispense cylinder against said closure cap in sealing registry over said dispense end opening of said dispense member and for freely supporting said working end of said dispense cylinder with respect to said ram apparatus;
• whereby said ram apparatus forces the container against said internal dispense cylinder wall to further carry said dispense cylinder against said closure cap.

A method of dispensing a fluid, comprising the steps of:

• providing a fluid to be dispensed in a flexible rupturable container;
• providing an elongate dispenser housing including a dispense end defining a dispense opening and an internal cylindrical wall defining a dispenser well communicating with said dispense opening and further including an actuation end opposite said dispense end;
• positioning a closure cap defining a burst port defining one end of an elongate fluid passageway through said closure cap over said dispense opening;
• thrusting said container against said closure cap with sufficient force to rupture said container at said burst port to express the fluid to be dispensed through said fluid passageway of said cap and to provide a seal with said container at said closure cap;
• and
• freely supporting said actuation end of said dispense housing during said forcing step.