Rotary kinetic fluid motors or pumps – Including heat insulation or exchange means
Patent
1989-06-21
1990-05-29
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Including heat insulation or exchange means
415 90, F01D 508
Patent
active
049291513
ABSTRACT:
A molecular or turbomolecular type of pump comprising a stator (2) and a rotor (3) rotated by a motor (7), the stator having a first zone overlying the rotor and in which gas is admitted, and a second zone adjacent to the drive motor and cooled by a flow of fluid (8), the pump being characterized in that the first zone is provided with heater (12) for maintaining the temperature of the first zone above the condensation threshold of the gas being admitted, with the first and second zones being separated from each other by a thermal impedance element (13).
REFERENCES:
patent: 4797062 (1989-01-01), Deters et al.
patent: 4804313 (1989-02-01), Nasvytis
European Patent No. 197,238, Nov. 1986.
Long Jacques
Perrillat-Amede Denis
Garrett Robert E.
Kwon John T.
Societe Anonyme dite: Alcatel Cit
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