Patent ID: 7950910

Claim:
A piston cartridge, comprising: a piston chamber; an inlet port positioned adjacent to the piston chamber and providing a pathway through which a fluid may enter the piston chamber; a first outlet port positioned adjacent to the piston chamber and providing a pathway though which the fluid may exit the piston chamber; a piston at least partially positioned within the piston chamber and moveable between a first position that is relatively close to the inlet port and a second position that is relatively far from the inlet port; a first barrier positioned between the piston and the inlet port; a first sealing member positioned and moveable between the first barrier and the inlet port, wherein the first sealing member substantially seals the inlet port when positioned adjacent to the inlet port but allows the fluid into the piston chamber when positioned adjacent to the first barrier; a second barrier being a C-spring positioned adjacent to the first outlet port; and a second sealing member positioned and moveable between the piston and the second barrier, wherein the second sealing member substantially seals the first outlet port when positioned adjacent thereto but allows the fluid to pass through the first outlet port when urged against to deform the second barrier.