Patent ID: 7125224

Claim:
A rotary kinetic pump which operates on principles on inertia and momentum and said pump having rotating chambers which are filled with fluid by NPSH driven by atmospheric pressure, with the fluid gaining rotational energy within any enclosed chamber through force being transmitted to the fluid by a curved housing wall rather than by a rotor blade, and the enclosed fluid being allowed to exit through one or more tangentially orientated rotary discharge ports; and with the structure of said rotary kinetic pump consisting of: a rotor having a radially inner surface and a radially outer surface, with at least one communicating passage, and with the radially inner surface forming an intake plenum, and the radially outer surface and an end surface rotating in close proximity to a cavity in a stator housing member, and at the juncture of the radially outer surface of said rotor, at least one tangential discharge port, for a short angular sector of rotation, passing through the stator housing member wall so that fluid is discharged sinusoidally and intermittently as the rotor passage passes the discharge port, and outside of the angular sector of rotation of the discharge port during rotation, the passage is closed by the close proximity contact with the inner cavity wall of the housing at least momentarily, such that fluid is contained within the rotor passage and is not moving with respect to said rotor passage, so that when said rotor passage passes said tangential discharge port, the fluid in the radially outer portion of said rotor passage is ejected by momentum, and leaves a vacuum in the radially inner portion of said rotor passage, such that fluid enters the radially inner fluid passage by NPSH, and the fluid is only drawn in when the passage is open to said tangential discharge port, so that intake only takes place for a limited angle of rotation for said fluid passage, and when fluid is passing through an extended passage which includes the rotor passage plus discharge port, the cross sectional area at the radially inner passage entrance is substantially larger than any downstream area, such that the higher velocity discharge fluid capacity does not exceed the intake capacity, and that the intake plenum has at least one fluid intake means passing through the stator housing wall in which fluid is aimed toward the angular sector of intake to any open rotor passage, such that fluid, driven by NPSH at that angular sector enters the fluid passage in said rotor in a direct manner in which little force exists between the entering fluid and the rotor passage walls.