Patent ID: 7681765

Claim:
A dispensing system for dispensing a fluid comprising: a dispensing tube; a pump mechanism for delivering a fluid from a container; a pump actuator connected to the container for movement between a first position and a second position; a bayonette guide mounted for movement with said pump actuator and defining a bore extending through said bayonette guide to allow passage of the fluid from the pump mechanism to said dispensing tube; a draw back chamber formed between the pump actuator and the bayonette guide for holding a residual fluid; a fluid passageway between the bore and the draw back chamber; a pump motor for moving the pump actuator to said first position to actuate the pump mechanism and propel a dose of the fluid through said bore and into said dispensing tube and to collapse the draw back chamber to propel the residual fluid through said fluid passageway into said bore; said pump actuator moving to said second position to expand said draw back chamber and draw the fluid from the dispensing tube into the draw back chamber.