Patent ID: 8733736

Claim:
A fluid delivery apparatus comprising: an inlet channel; an outlet channel; an internal cavity connected between the inlet and outlet channels; a first aspiration cavity connected to the internal cavity; and a valve disposed within the internal cavity and movable between a priming position, a first pumping position, and a second pumping position, the valve configured to fluidly couple the inlet and outlet channels when in the priming position and to fluidly couple the first aspiration cavity with the inlet channel and the outlet channel when in the first and second pumping positions, respectively, the valve comprising: a priming tubule configured to fluidly connect the inlet channel and the outlet channel when the valve is in the priming position; and a wedge-shaped opening configured to fluidly connect the inlet channel to the first aspiration cavity when the valve is in the first pumping position and fluidly connect the outlet channel to the first aspiration cavity when the valve is in the second pumping position.