Pumps – Motor driven – Electric or magnetic motor
Patent
1997-10-21
2000-08-29
Freay, Charles G.
Pumps
Motor driven
Electric or magnetic motor
4174237, 310254, 310 68B, F04B 1700
Patent
active
061098922
ABSTRACT:
A positioning device for a miniature fan includes a coil seat having an axle tube, an upper polar plate assembly, a lower polar plate assembly, and a winding mounted between the upper polar plate assembly and the lower polar plate assembly. A circuit board is mounted to the axle tube and includes a sensor element for activating a rotor. The sensor element is located on a vertical line extending from an end edge of the lower polar plate assembly along a direction parallel to a longitudinal axis of the axle tube.
REFERENCES:
patent: 4773829 (1988-09-01), Vettori
patent: 5010263 (1991-04-01), Murata
patent: 5093599 (1992-03-01), Horng
patent: 5097170 (1992-03-01), Baines
Freay Charles G.
Sunonwealth Electric Machine Industry Co. Ltd.
Tyler Cheryl J.
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