A magnetic pump in which a fluid is driven by means of an impeller. A stator which is adapted to rotate, through the medium of a magnetic force, a magnetic rotor attached to the impeller is disposed so as to face the magnetic rotor through a non-magnetic partition wall.Magnetic pumps A magnetic pump comprising: a photographic processing bath having a non-magnetic bottom wall; an impeller chamber integrally formed with said photographic processing bath as a part of said bottom wall, Self-priming pumpssaid bottom wall having an inwardly bent recessed portion defining said impeller chamber such that said impeller chamber is completely disposed internally of said bottom wall so as to not protrude therefrom; a magnetic rotor supported on said impeller; a stator oppositely and outwardly disposed at a portion apart from said rotor with an interval therebetween through said non-magnetic bottom wall so as to face said magnetic rotor and be isolated from said impeller chamber, said stator being adapted to apply rotational force to said magnetic rotor due to magnetic force; and a cover removably disposed on said bottom wall of said photographic processing bath to define said impeller chamber said cover having means for circulating solution, an integrally formed inlet duct, an inlet opening, a discharge duct, and a plurality of discharge holes, said discharge holes being longitudinally disposed along said discharge duct to face toward a conveying path of a photosensitive medium. It is an object of the present invention to provide, in consideration of the above-described facts, a small-sized magnetic pump consisting of a small number of parts. To this end, the present invention provides a magnetic pump comprising: an impeller for driving a fluid; an impeller chamber for accommodating the impeller; a magnetic rotor supported on the impeller; a stator disposed so as to face the magnetic rotor and adapted to apply a rotational force to the magnetic rotor through the medium of a magnetic force; and a non- magnetic partition wall disposed between the stator and the magnetic rotor so as to isolate the stator from the impeller chamber. In this arrangement, the magnetic rotor has the same function as that of a magnetic rotor of a motor; and the stator has the same function as that of a stator of the motor. The stator operates to apply a driving force of the magnetic rotor fixed to the impeller through the medium of a magnetic force acting though a non- magnetic partition wall, thereby rotating the impeller. Since the magnetic rotor is driven by the stator through the non- magnetic partition wall, the stator of the motor also has the function of the driving magnetic body of the conventional magnetic pump, thereby enabling a reduction in the number of component parts and a reduction in the size.

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2012-01-05

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