Patent ID: 7823751

Claim:
A dispensing pump comprising: a first reservoir with a first fluid; a second reservoir with a dry particulate solid flowable material capable of flowing under gravity, a vertical fluid dispensing tube having a lower end for dispensing the fluid downwardly, and a flowable material outlet disposed about the fluid dispensing tube adjacent thereto at a height above the lower end of the fluid dispensing tube for simultaneously dispensing the flowable material downwardly therefrom, a single piston member within a piston chamber-forming element defining therebetween a first fluid chamber having an inlet in communication with the first reservoir and the fluid dispensing tube as an outlet and a flowable material chamber having an inlet in communication with the second reservoir and an outlet in communication with the flowable material outlet, the piston member reciprocally movable in the piston chamber-forming element and in movement in a first direction, the first fluid is drawn into the first fluid chamber and the inlet to the flowable material chamber is opened and in movement in the opposite direction, the first fluid is expelled from the fluid dispensing tube and the inlet to the flowable material chamber is closed, reciprocal movement of the piston member in the piston chamber-forming element simultaneously extruding the first fluid from the lower end of the fluid dispensing tube and the flowable material from the solid material outlet.