Patent ID: 6398954
Filing Date: 2002-06-04
Classification: B01D,C02F,Y10T

Abstract:
A rotatable valve comprising:a housing having an elongate cylindrical chamber therein; first, second, third and fourth passages extending through said housing and communicating with said chamber; a cylindrical valve body mounted for rotation in said chamber, said valve body having an axially extending passage therein, said axially extending passage communicating with a source of fluid supply for the valve, said valve body having a first area adjacent its cylindrical surface which is aligned with said first and fourth passages, and a second area also adjacent its cylindrical surface which is aligned with said second and third passages, said valve body also including first and second ports communicating between said axially extending passage and said first area and a third port communicating between said axially extending passage and said second area; said cylindrical valve body being selectively rotatable between either of at least three positions including, a first position in which said first port communicates with said first passage and said second passage communicates with said third passage, a second position in which said second port communicates with said first passage, and a third position in which said third port communicates with said second passage and said first passage communicates with said fourth passage.