Vacuum pump

Details Vacuum pump Vacuum pump

2005-03-29

2009-08-11

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

C415S200000

Reexamination Certificate

active

07572096

ABSTRACT:
A vacuum pump is provided in which gas molecules in a vacuum chamber are sucked and exhausted by the rotational motion of a rotor rotatably supported in a pump case. At least one nickel alloy layer is disposed on a surface of at least one component defining a flow path in the vacuum pump for increasing a resistance of the component to corrosion due to a corrosive effect of a gas flowing through the flowpath. A nickel oxide is formed on a surface of the nickel alloy layer and has a higher emissivity than that of the nickel alloy layer for increasing a quantity of heat radiated from the surface of the component when the component is heated during operation of the vacuum pump.

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http://web.archive.org/web/20031211134926/http://snap.fnal.gov/crshield/crs-mech/emissivity-eoi.html.
http://web.archive.org/web/20010124102400/http://www.omega.com/literature/transactions/volume1/emissivitya.html.
http://web.archive.org/web/20040125054311/http://ib.cnea.gov.ar/˜experim2/Cosas/omega/emissivity.htm.

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