Condiment dispensing device

A fluid-driven pump for use in a condiment dispensing system, comprising:

• a housing means having first and second ends and an inner surface defining at least one interior cavity;
• a piston slidably positioned within said housing means, said piston being reciprocally movable through intake and exhaust strokes within said interior cavity for selectively drawing a pre-determined quantity of condiment thereinto and dispensing the predetermined quantity therefrom;
• a seal assembly engaged to and enclosing the second end of said housing means, said seal assembly defining an inlet/exhaust port for supplying a pressurized fluid to a portion of the interior cavity intermediate the piston and the second end for initiating an exhaust stroke of the piston and venting the pressurized fluid from the interior cavity during the intake stroke of the piston;
• a product inlet disposed in the first end of the housing means for placing said interior cavity in fluid communication with a condiment reservoir during the intake stroke of the piston;
• a product outlet disposed in the first end of the housing means for placing said interior cavity in fluid communication with a condiment dispensing apparatus during the exhaust stroke of the piston;
• a first spring means disposed within said interior cavity, said first spring means being directly engaged to said piston in a manner operable to bias said piston toward the second end of the housing means when the pressurized fluid is vented from the interior cavity via said inlet/exhaust port;
• and
• an inlet check valve positioned between said product inlet and said piston, and an outlet check valve positioned between said product outlet and said piston, said outlet check valve being adapted to pull a vacuum within said product outlet during the intake stroke of said piston to eliminate drippage of residual condiment from said condiment dispensing apparatus.