Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Patent
1987-10-20
1989-01-10
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
415177, F01D 136
Patent
active
047970626
ABSTRACT:
A device for moving a gas at a subatmospheric pressure with a screwthread-like device on at least one of the facing surfaces of a rotor spacedly surrounded axially by a relatively-rotatable stator insulates the stator from a housing for the device to prevent thermal variation of the space between the rotor and stator and, thus, keeping the gas-moving action constant.
REFERENCES:
patent: 3628894 (1971-12-01), Ferguson
patent: 3832084 (1974-08-01), Maurice
patent: 3947193 (1976-03-01), Maurice
patent: 4180370 (1979-12-01), Klatt et al.
patent: 4270882 (1981-06-01), Luijten et al.
patent: 4332522 (1982-06-01), Saulgeot
patent: 4502832 (1985-03-01), Becker
patent: 4512725 (1985-04-01), Saulgeot
Theorie und Praxis der Vakuumtechnik (Theory and Practice of Vacuum Technology), by Wutz, Adam and Walcher, pp. 202 to 212.
Deters Ludger
Englander Heinrich
Kabelitz Hans-Peter
Schutz Gunter
Garrett Robert E.
Kwon John T.
Leybold-Heraeus GmbH
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