Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Reexamination Certificate
2006-11-14
2006-11-14
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
C415S221000
Reexamination Certificate
active
07134835
ABSTRACT:
A process for manufacturing stators of vacuum pumps, and stators obtained thereby, wherein a plurality of stator discs or rings are formed, preferably by pressing, and then stator discs or rings are coaxially stacked and mutually rotated so as to form a stator surface having defined thereon at least one groove extending in substantially axial direction with respect to a body of the stator.
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patent: 1492486 (1924-04-01), Smith
patent: 2730297 (1956-01-01), Verhoeff et al.
patent: 6193461 (2001-02-01), Hablanian
patent: 6454525 (2002-09-01), Blecker et al.
patent: 2218615 (1973-10-01), None
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patent: 0260733 (1991-03-01), None
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patent: 1249612 (2002-10-01), None
Casaro Fausto
Gotta Romina Silvia
Maccarrone Cristian
Missier Cinzia Del
Fishman Bella
Hanan Devin
Look Edward K.
Varian S.p.A.
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