A piston pump including an inlet manifold, and outlet manifold, and a piston
ring
sandwiched between the inlet and outlet manifolds. The inlet manifold has a first
face and a second face with at least one outlet formed in the second face. The
outlet manifold has a first face and a second face, and includes at least one inlet
formed in the outlet manifold first face. The piston ring has an inlet face and
an exhaust face, wherein the piston ring is sandwiched between said inlet manifold
second face and said outlet manifold first face, and has at least one radially
extending cylinder formed therein. The piston ring further includes an inlet passageway
formed in the piston ring between the inlet face and the cylinder and in fluid
communication with the inlet manifold. The piston ring also has an exhaust passageway
formed therein between said cylinder and the exhaust face and in fluid communication
with the outlet manifold inlet. A piston is disposed in the cylinder for reciprocating
movement, wherein reciprocating movement of the piston allows fluid into the cylinder
through the inlet passageway and exhausts fluid out of the cylinder through the
exhaust passageway.
