Rotary kinetic fluid motors or pumps – Method of operation
Reexamination Certificate
2006-04-04
2006-04-04
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
Method of operation
C415S009000, C415S062000, C415S066000, C415S068000, C415S090000, C415S143000, C415S229000, C417S205000, C417S244000, C417S423400, C417S423120
Reexamination Certificate
active
07021888
ABSTRACT:
An ultra-high speed vacuum pump evacuation system includes a first stage ultra-high speed turbofan and a second stage conventional turbomolecular pump. The turbofan is either connected in series to a chamber to be evacuated, or is optionally disposed entirely within the chamber. The turbofan employs large diameter rotor blades operating at high linear blade velocity to impart an ultra-high pumping speed to a fluid. The second stage turbomolecular pump is fluidly connected downstream from the first stage turbofan. In operation, the first stage turbofan operates in a pre-existing vacuum, with the fluid asserting only small axial forces upon the rotor blades. The turbofan imparts a velocity to fluid particles towards an outlet at a high volume rate, but moderate compression ratio. The second stage conventional turbomolecular pump then compresses the fluid to pressures for evacuation by a roughing pump.
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McAndrews Held & Malloy Ltd.
Universities Research Association Inc.
Verdier Christopher
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