Gas friction pump

Details Gas friction pump Gas friction pump

2006-06-13

2006-06-13

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

C415S055100, C415S090000

Reexamination Certificate

active

07059828

ABSTRACT:
A gas friction pump, comprising stationary pump-active components (14) and rotatable pump-active components (15) secured on a rotatable rotor shaft (4), wherein the rotor shaft is supported with a bearing (5) at the high-vacuum-side end and a bearing arrangement at a fore-vacuum side end, characterized in that the high-vacuum side bearing is formed as a conventional bearing, and the fore-vacuum bearing arrangement contains at least one gas bearing. In an advantageous embodiment, the gas bearing is formed as a module and can be brought in engagement with a cylindrical portion of the housing and secured therein.

REFERENCES:
patent: 5380171 (1995-01-01), Nagaoka et al.
patent: 5501583 (1996-03-01), Nagaoka et al.
patent: 3716221 (1987-11-01), None
patent: 1475765 (1967-02-01), None

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