Evacuation apparatus

Details Evacuation apparatus Evacuation apparatus

1989-10-05

1990-09-04

Rivell, John

Pumps

Diverse pumps

Including rotary nonexpansible chamber type

417205, 417267, 415 90, F04B 2310

Patent

active

049540475

ABSTRACT:
An evacuation apparatus comprising (1) a reciprocating vacuum pump, the piston rings and piston shaft sealing material of which are made of a self-lubricating material at least on the surface and in which metallic bellows is or are used to seal between the piston shaft outside the cylinder and the outer face of the cylinder end wall, and (2) a turbomolecular pump in which a casing, stationary blades mounted on the casing, a rotor, and moving blades provided on the rotor are arranged coaxially, and in which the delivery opening of the reciprocating vacuum pump is open to the atmosphere and the suction opening of the turbomolecular pump is joined to an apparatus to be evacuated.

REFERENCES:
patent: 845738 (1907-03-01), Alberger
patent: 2926835 (1960-03-01), Lorenz
patent: 3104802 (1963-09-01), Eckberg
patent: 4023920 (1977-05-01), Bachler et al.
patent: 4090815 (1978-05-01), Nakamoto
patent: 4111595 (1978-09-01), Becker et al.
patent: 4111609 (1978-09-01), Braun
patent: 4225288 (1980-09-01), Mugele et al.
patent: 4797068 (1989-01-01), Hayakawa et al.
patent: 4826394 (1989-05-01), Lotz
patent: 4887941 (1989-12-01), Crinquette et al.

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