Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Plural – independent – serially acting re-entry means
Reexamination Certificate
2007-06-12
2007-06-12
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Plural, independent, serially acting re-entry means
C415S058200, C415S144000, C415S914000
Reexamination Certificate
active
10818640
ABSTRACT:
A compressor for compressing a gas comprises an impeller wheel (1) mounted within a housing (2) defining an inlet and an outlet (6). The inlet comprises an outer tubular wall (7) extending away from the impeller wheel in an upstream direction and forming a gas intake portion (8) of the inlet, and an inner tubular wall (9) of diameter D extending away from the impeller wheel in an upstream direction within the outer tubular wall (7) and defining an inducer portion (10) of the inlet. An annular gas flow passage (11) is defined between the inner and outer tubular walls (9, 7) and has an upstream end and a downstream end separated by a length L1measured along its axis. The upstream end of the annular passage (11) communicates with the intake or inducer portions of the inlet through at least one upstream aperture and at least one downstream aperture (13) communicates between a downstream portion of the annular flow passage (11) and the impeller. The inner tubular wall (9) has a length L2extending upstream from the downstream aperture(s) (13). The length of the inner tubular wall (9) is such that L1/D>0.65 and/or L2/D>0.6.
REFERENCES:
patent: 4743161 (1988-05-01), Fisher et al.
patent: 4834611 (1989-05-01), Meng
patent: 4990053 (1991-02-01), Rohne
patent: 5246335 (1993-09-01), Mitsubori et al.
patent: 5333990 (1994-08-01), Foerster et al.
patent: 6623239 (2003-09-01), Sahay et al.
patent: 6726441 (2004-04-01), Sumser et al.
patent: 2005/0002782 (2005-01-01), Nikpour et al.
patent: 2005/0163606 (2005-07-01), Svihla et al.
patent: 0547535 (1993-06-01), None
patent: 2319809 (1998-06-01), None
patent: WO 98/16747 (1998-04-01), None
Eynon Paul A.
Howarth Steven
Nikpour Bahram
Saxton Roy
Holset Engineering Company Limited
Kershteyn Igor
Krieg DeVault LLP
Schelkopf, Esq. J. Bruce
LandOfFree
Compressor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compressor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3829003