Patent ID: 6597883
Filing Date: 2003-07-22
Classification: F04C,G03G,Y10S

Abstract:
A powder pump, comprising:a stator comprised of a through hole, the through hole comprising two spirally extended grooves; and a rotor rotatably provided to the through hole of the stator and spirally extended such that a cavity to convey a powder is formed between an outer peripheral surface of the rotor and an inner peripheral surface of the through hole of the stator, the rotor being configured to convey the powder enclosed in the cavity while moving the cavity, wherein (RAâˆ’SN&gE;0.45),and (RBâˆ’(SN+SX)/2)&gE;0.45) are satisfied when a diameter of a cross section of the rotor, an outer diameter of the rotor, a minimum inner diameter of the through hole of the stator, and a maximum inner diameter of the through hole of the stator are in millimeters and represented by RA, RB, SN, and SX, respectively.