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Electric axial flow pumpRelated Patent Categories: Pumps, Motor Driven, Pump Within Rotary Working Member, Pump Within ArmatureElectric axial flow pump description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080038122, Electric axial flow pump. Brief Patent Description - Full Patent Description - Patent Application Claims
CLAIM OF PRIORITY [0001] The present application claims priority from Japanese application serial No. 2006-198947, filed on Jul. 21, 2006, the content of which is hereby incorporated by reference into this application. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an electric axial flow pump having a stator and a rotor. [0004] 2. Prior Art [0005] The electric axial flow pump is widely used such as a vacuum pump for sucking electronic parts used in an electronic part mounting device and a circulating pump for circulating cooling water in a cooling circuit used in an automobile and a portable personal computer. [0006] When using the electric axial flow pump as a vacuum pump, there is a case that the electric axial flow pump and a suction section for directly sucking electronic parts are installed separately from each other and an auxiliary section such as a pipe for connecting the electric axial flow pump and suction section is necessary. The reason that the electric axial flow pump and suction section are installed separately from each other is conceivably that the volume of the electric axial flow pump is large. Therefore, a motor having a built-in pump excluding an auxiliary section such as a pipe which is realized by mounting an electric axial flow pump in a suction section rotated by a motor is proposed (for example, refer to Patent Document 1). To mount the electric axial flow pump on the suction section, further miniaturization of the electric axial flow pump is desired. [0007] Further, also with respect to the circulating pump, since the cooling circuit and furthermore an automobile and a portable personal computer are designed according to the volume of the electric axial flow pump, from the viewpoint of enhancement of the degree of freedom of the design of an automobile and a portable personal computer, further miniaturization of the electric axial flow pump is desired. And, a fluidic pump in which the stator of the motor of the electric axial flow pump is described as a claw pole stator, thus the length of the motor in the direction of the rotary shaft is shortened is proposed (for example, refer to Patent Documents 2 and 3). [0008] Patent Document 1: Japanese Patent Application Laid-open Publication No. 2005-220812 (Paragraphs 0020 to 0023, FIG. 2) [0009] Patent Document 2: Japanese Patent Application International Publication No. 2003-505648 (Paragraph 0020, FIG. 2) [0010] Patent Document 3: Japanese Patent Application International Publication No. 2003-515059 (Paragraph 0032, FIG. 3) SUMMARY OF THE INVENTION [0011] Therefore, the object of the present invention is to provide an electric axial flow pump able to be miniaturized. [0012] To solve the aforementioned object, the present invention provides an electric axial flow pump including a rotor having a cylindrical hollow shaft having open ends which is arranged so as to be surrounded by a stator and a flow generation section which is fixed inside the hollow shaft, rotates integrally with the rotor when a field coil of the stator is excited, thereby generates flow of a fluid inside the hollow shaft. [0013] According to the present invention, an electric axial flow pump capable of miniaturization can be provided. BRIEF DESCRIPTION OF THE DRAWINGS: [0014] FIG. 1(a) is a side view of the electric axial flow pump relating to the first embodiment of the present invention and FIG. 1(b) is a cross sectional view in the direction A-A shown in FIG. 1(a), wherein to a flow generation section 2, a front view is applied to provide easy understanding, [0015] FIG. 2 is a cross sectional view of the rotor of the electric axial flow pump in the vertical plane shown in the first embodiment of FIG. 1, [0016] FIG. 3 is an exploded perspective view of the stator of the electric axial flow pump shown in the first embodiment of FIG. 1, [0017] FIG. 4 is a perspective view of the stator including the cut section shown in the first embodiment of FIG. 1, [0018] FIG. 5 is a bottom view of the first claw pole core or second claw claw core of the stator magnetic core of the stator shown in the first embodiment of FIG. 1, [0019] FIG. 6 is a top view of the first claw pole core or second magnetic core of the stator magnetic core of the stator shown in the first embodiment of FIG. 1, [0020] FIG. 7 is a cross sectional view in the direction B-B shown in FIG. 6, Continue reading about Electric axial flow pump... 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