Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Patent
1997-04-30
1998-12-15
Kwon, John T.
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
F01D 136
Patent
active
058488731
ABSTRACT:
A vacuum pump of the regenerative type comprising a rotor and a stator body in which the rotor is adapted for rotation. The rotor has a series of blades positioned in an annular array on a side of the rotor. The stator has an annular channel within which the blades can rotate having a cross-sectional area greater than that of the individual blades except for a small part of the channel which has a reduced cross-section providing a close clearance for the blades. Further, the rotor has at least two series of blades positioned in concentric annular arrays on a side of the rotor and the stator has a corresponding number of channels within which the blades of the arrays can rotate. The channels are linked to form a continuous passageway through which gas being evacuated by the pump can pass.
REFERENCES:
patent: 4090815 (1978-05-01), Nakamura
patent: 5547338 (1996-08-01), Conrad et al.
patent: 5662456 (1997-09-01), Englander
patent: 5664935 (1997-09-01), Nishiuchi et al.
patent: 5688106 (1997-11-01), Cerruti et al.
Kwon John T.
Pace Salvatore P.
Rosenblum David M.
The BOC Group plc
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