Patent ID: 7637279

Claim:
A shuttle valve comprising: a body defining an interior chamber; an inlet port, an outlet port and a common port, each of the ports being coupled to the body; a shuttle translatably disposed within the chamber between a first position wherein the inlet port and the common port are fluidicly coupled and the common port and the outlet port are fluidicly uncoupled and a second position wherein the outlet port and the common port are fluidicly coupled and the common port and the inlet port are fluidicly uncoupled the shuttle adapted to change position from the first position to the second position and from the second position to the first position solely in response to pressure of fluid intended to be communicated through the common port; a first check valve coupled to the inlet port in a manner to permit fluid flow through the inlet port into the chamber and to prevent fluid from discharging from the chamber through the inlet port; and a second check valve coupled to the outlet port in a manner to permit fluid to discharge from the chamber through the outlet port and to prevent fluid from flowing through the outlet port into the chamber.