Patent ID: 8313300

Claim:
A rotor for a compressor comprising: a cap, wherein the cap includes a periphery edge spaced at a generally constant distance from a central rotational axis of the rotor and wherein the cap includes a central inlet; a base, the base including a periphery edge spaced at a generally constant distance from the rotational axis of the rotor; and a plurality of blades extending between the base and the cap, each blade including a tail positioned closer to the periphery edge of the cap and a tip positioned closer to the central inlet; wherein at least one of the plurality of blades is positioned such that a line passing through the tip of the blade and the tail of the blade is inclined at an angle between about 10-20 degrees with a line passing through the rotational axis of the rotor and the tail of the blade, wherein the rotor comprises a plurality of secondary blades and a plurality of primary blades, wherein the secondary blades are positioned between the primary blades, and wherein the primary blades are longer than the secondary blades, and wherein the rotor includes between ten to fifteen primary blades and ten to fifteen secondary blades.