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PumpRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Rotary Motor And Rotary Nonexpansible Chamber PumpPump description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070014677, Pump. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND [0001] The invention relates to a pump, and in particular to a centrifugal pump with an integrally formed rotor. [0002] Referring to FIG. 1, a conventional centrifugal pump comprises a rotating portion 10, a bearing 12, and a magnet 14. The rotating portion 10, bearing 12, and magnet 14 are individually and separately manufactured and then assembled together by press fitting to form a rotor. [0003] As the rotating portion 10, bearing 12, and magnet 14 respectively provide tolerances, deviation of concentricity and roundness of the rotor after assembly is large. Operation of the centrifugal pump is thus adversely affected. Namely, moment of inertia, vibration, and noise may be generated during operation of the centrifugal pump, adversely affecting output performance thereof. [0004] Moreover, because the rotating portion 10, bearing 12, and magnet 14 are individually and separately manufactured and then assembled together by press fitting, connection and engagement therebetween is weak, reducing reliability of the rotor. SUMMARY [0005] Accordingly, the present invention provides a pump comprising a housing, a rotor, and a stator. The housing comprises a fluid inlet and a fluid outlet. The rotor is disposed in the housing and comprises a rotating portion, a magnet, and a bearing. The magnet is disposed on one side of the rotating portion. The bearing is disposed in the center of the rotating portion. The stator is disposed in the housing and corresponds to the magnet of the rotor, providing electromagnetic force required for rotation of the rotor. The rotating portion, magnet, and bearing are integrally formed. [0006] The rotor is integrally formed by plastic injection molding. [0007] The magnet is disposed in the interior or exterior of the rotating portion. [0008] The stator is disposed in the interior or exterior of the rotor. [0009] The pump further comprises a shaft axially penetrating the rotor. [0010] The housing further comprises a top cover and a frame body. An accommodation chamber is formed between the top cover and the frame body for accommodating the rotor. [0011] The housing further comprises a bottom cover. A sealed chamber is formed between the bottom cover and the frame body for accommodating the stator. [0012] The stator comprises a plurality of stacked silicon steel sheets and a coil. [0013] The pump comprises a centrifugal pump. [0014] The rotor comprises a plurality of blades on a top surface thereof. [0015] During integral formation of the rotor, the magnet and bearing are placed in a mold forming the rotor. The rotor is integrally formed with the magnet and bearing by plastic injection molding. The housing, rotor, shaft, and stator are then assembled to form the centrifugal pump. [0016] The centrifugal pump can be an outer-rotor type or inner-rotor type pump. In the outer-rotor type pump, the stator is disposed in the interior of the rotor. In the inner-rotor type pump, the stator is disposed in the exterior of the rotor. DESCRIPTION OF THE DRAWINGS [0017] The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: [0018] FIG. 1 is a schematic exploded view of a rotor of a conventional centrifugal pump; [0019] FIG. 2A is a schematic cross section of a rotor of an outer-rotor type centrifugal pump of an embodiment of the invention; [0020] FIG. 2B is a schematic cross section of a rotor of an inner-rotor type centrifugal pump of an embodiment of the invention; [0021] FIG. 3A is a schematic cross section of an outer-rotor type centrifugal pump of an embodiment of the invention; and Continue reading about Pump... Full patent description for Pump Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Pump patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Pump or other areas of interest. ### Previous Patent Application: Asymmetric dual diaphragm pump Next Patent Application: Hermetic compressor Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Pump patent info. IP-related news and info Results in 0.08437 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
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