Patent ID: 6579079
Filing Date: 2003-06-17
Classification: F04B

Abstract:
A rotary valve for use in a piston pump assembly to discharge a metered amount of liquid, gel, or slurry comprisinga valve body having a first channel pathway and a second channel pathway, said first channel pathway having an inlet opening to receive a liquid, gel, or slurry and an outlet opening to provide said liquid, gel, or slurry to a pathway of said piston pump assembly, said second channel pathway having a plurality of inlet openings each capable of communicative alignment with said pathway of said piston pump assembly and at least one outlet opening communicative with said inlet openings, said valve body being capable of rotation with respect to said piston pump assembly to dispose said inlet opening of said first channel pathway to an operative position to receive fluid communication of said liquid, gel, or slurry through said first channel pathway and provide the same to said pathway of said piston pump assembly and an inoperative position closing said first channel pathway from such fluid communication, and said valve body being capable of rotation with respect to said piston pump assembly to dispose said second channel pathway to an operative position in communicative alignment with said pathway of said piston pump assembly to discharge said liquid, gel, or slurry from said piston pump assembly and an inoperative position to prevent said discharge.