Pump Driving Apparatus
OwnerFumito Komatsuinventor
Life of this patent
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Abstract
A pump driving apparatus that can suppress backflow of a liquid in a pump chamber and improve pump efficiency is provided. A guide tube 23 is provided coaxially with an output shaft 4 of a motor M inside a pump chamber 8, and the ends in the axial direction of the guide tube 23 are fitted into and make sliding contact with a case inner wall surface that forms the pump chamber 8 and a shaft core-side inner wall surface 25 of an impeller 9 enclosed inside the pump chamber 8.
Claims4
A pump driving apparatus that draws in a liquid in an axial direction into a pump chamber and expels the liquid in the circumferential direction using an impeller that is magnetically coupled to a rotor of a motor and rotates about a fixed shaft,
- the pump driving apparatus comprising a guide tube that is provided inside the pump chamber so as to be coaxial with the fixed shaft, wherein ends of the guide tube in the axial direction are fitted to and make sliding contact with a case wall surface that forms the pump chamber and a core-side wall surface of the impeller enclosed inside the pump chamber.
Dependencies are inferred from the claim text.