Patent ID: 6575195
Filing Date: 2003-06-10
Classification: F16K,Y10T

Abstract:
A bypass valve for directing fluid flow, said bypass valve comprising:a valve body including a service inlet port, a service outlet port, a valve inlet port, and a valve outlet port; and a spool seated within said valve body, said spool being rotatable and axially translatable within said valve body, whereby particular combinations of rotation and axial translation of said spool result in the following modes of operation: a first mode in which the fluid flow is directed from said service inlet port, through a first portion of the bypass valve, then to said valve outlet port, then to said valve inlet port, through a second portion of the bypass valve, and finally out said service outlet port; a second mode in which the fluid flow is blocked from passing through said service inlet port, but the fluid flow is unhindered from passing through said service outlet port; a third mode in which the fluid flow is directed from said service inlet port, through the bypass valve, and then to said service outlet port; and a fourth mode in which the fluid flow is blocked from passing through said service inlet port as well as being blocked from passing through said service outlet port.