Pump with shaftless impeller

Details Pump with shaftless impeller Pump with shaftless impeller

1987-02-13

1989-02-21

Croyle, Carlton R.

Pumps

Motor driven

Motor within rotary pumping member

417365, 41742315, 41742312, 384123, 3849071, 384913, 415174, F04D 2904

Patent

active

048060801

ABSTRACT:
A pump including an impeller having a magnet or a second conductor therein, the impeller being adapted to be directly rotated by virtue of magnetic fields of stator coils. The impeller is rotated within a casing in close proximity thereto via ceramic bearing members, one bearing member having spiral grooves on its slide surface. The ceramic bearing members constitute a dynamic pressure bearing means.

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patent: 3853429 (1974-12-01), Wiedenmann
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patent: 4315359 (1982-02-01), Gray
patent: 4380355 (1983-04-01), Beardmore
patent: 4410285 (1983-10-01), Strasset et al.
patent: 4575264 (1986-03-01), Mizobuchi et al.
patent: 4655681 (1987-04-01), Mori et al.
patent: 4664592 (1987-05-01), Grzina
patent: 4699525 (1987-10-01), Mizobuchi et al.
"Spiral Groove Bearing-Compact and High Bearing Load", Seiho Yamamoto, Nikkei Mechanical 1979, 5.28.
"Grease-Lubricated Spiral-Groove Bearings", E. A. Muijderman et al., Philips Tech, Rev. 39, 184-198, 1980, No. 6/7.
"Design and Performance of Complaint Thrust Bearings with Spiral-Groove Members on Resilient Supports", L. Licht et al., Journal of Lubrication Technology, Jul. 1981, vol. 103/373.
"Dynamic Groove Bearing (Mass-Production, High Loading Capacity Precision in Rotating Accuracy)", Nikkei Mechanical 1982, 5.24.

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