Fluid rotating apparatus

Pumps – Condition responsive control of pump drive motor – In response to pump speed

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417 45, 417203, 417205, 4174234, 4182011, 318 77, 318 85, F04C 2300, F04D 1904

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active

051978610

ABSTRACT:
A fluid rotating apparatus according to the present invention is designed to promptly achieve an extremely high degree of vacuum from promptly atmospheric pressure promptly by its single apparatus. Moreover, high-speed synchronous rotation of the rotary shafts of the apparatus is controlled by use of a rotary position detecting sensor, to thereby avoid control mechanical contact thereof with a gear or the like. In addition, hydrostatic bearing are employed for supporting the rotary shafts to avoid of mechanical abrasion and the use of lubricant oil.

REFERENCES:
patent: 2640428 (1953-06-01), Houghton
patent: 4712048 (1987-12-01), Rebsamen
patent: 4758132 (1988-07-01), Hartwig
patent: 4797068 (1989-01-01), Hayakawa et al.
patent: 4808077 (1989-02-01), Kan et al.
Patent Abstracts of Japan "Multichannel Type Vacuum Pump", vol. 13, No. 225 (M-830) [3573], May 25, 1989.
"A Generalized Performance Computer Program for Oil Flooded Twin-Screw Compressor", Pawan J. Singh and Ghanshyam C. Patel, Ingersoll-Rand Research, Inc. Princeton, N.J., Sep. 1984, pp. 544-553.
"Computer Modeling for Performance Analysis of Rotary Screw Compressor" Mitsuru Fujiwara and katsuhiko Kasuya, Mechanical Enginerring Research Laboratory, Hitachi, Ltd., Ibaraki, Japan, May 1984, pp. 536-543.
"A New Molecular Pump", Louise Maurice, Proc. 6th Internal. Vacuum Congru. Sep. 1974 Japan, J. Appl. Phys. Suppl. 2, Pt. 1, Aug. 1974.

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