an apparatus and method for producing predetermined quantities of a meat product , inc which the apparatus comprises a twin vane concentric pump with an inlet and an outlet circumferentially spaced from one another , and a pair of independently movable vanes . during operation , one of the vanes is positioned between the inlet and outlet to permit pressurization of meat chunks in a chamber communicating with an outlet opening . the other vane is advanced toward the outlet with the outlet valve closed until a predetermined pressure is reached , at which point the outlet valve is opened to dispense a predetermined quantity of meat product . similar to single vane meat pumps , the disclosed twin vane pump is capable of handling large meat chunks while causing relatively little damage to the chunks . however , the disclosed twin vane pump provides greater operating efficiency than single vane pumps and also achieves greater pressurization of the meat product than prior art pumps , permitting the meat product to be directly transferred to a stuffing horn without the need for further pressurization .