Pumps – One fluid pumped by contact or entrainment with another – Jet
Reexamination Certificate
2005-04-12
2005-04-12
Freay, Charles G. (Department: 3746)
Pumps
One fluid pumped by contact or entrainment with another
Jet
C417S196000, C417S183000
Reexamination Certificate
active
06877960
ABSTRACT:
An ejector system comprises a lobed, supersonic primary nozzle and a convergent/divergent ejector shroud. The lobed nozzle is just upstream from the ejector shroud, such that there is an annular space between the nozzle and shroud for admitting a secondary flow. In operation, a primary flow of high-pressure steam or air is directed through the primary nozzle, where it is accelerated to supersonic speed. The primary flow then exits the primary nozzle, where it entrains and is mixed with the secondary flow, creating a low pressure region or vacuum. The ejector shroud subsequently decelerates the combined flow while increasing the flow pressure, which increases suction performance and reduces energy loss. Because the primary nozzle mixes the two flows, the ejector shroud is able to have a length-to-entrance-diameter ratio significantly smaller than typical shrouds/diffusers, which decreases the system's size and increases performance.
REFERENCES:
patent: 2223242 (1940-11-01), Sweet, Jr.
patent: 2501276 (1950-03-01), Hickman
patent: 2759661 (1956-08-01), Noller et al.
patent: 3823872 (1974-07-01), Frenzl
patent: 3912469 (1975-10-01), Ewan et al.
patent: 3972196 (1976-08-01), Silvestri, Jr.
patent: 4141701 (1979-02-01), Ewan et al.
patent: 4184806 (1980-01-01), Prinz
patent: 4272499 (1981-06-01), Cason et al.
patent: 4358249 (1982-11-01), Hanson
patent: 4379679 (1983-04-01), Guile
patent: 4586873 (1986-05-01), Lepretre et al.
patent: 4835961 (1989-06-01), Presz, Jr. et al.
patent: 4867918 (1989-09-01), Kiyonaga et al.
patent: 4898517 (1990-02-01), Eriksen
patent: 4921886 (1990-05-01), Ewan et al.
patent: 4931225 (1990-06-01), Cheng
patent: 5061406 (1991-10-01), Cheng
patent: 5087175 (1992-02-01), Raizman et al.
patent: 5309736 (1994-05-01), Kowalski et al.
patent: 5435127 (1995-07-01), Luffy et al.
patent: 5440875 (1995-08-01), Torkelson et al.
patent: 5509349 (1996-04-01), Anderson et al.
patent: 5622655 (1997-04-01), Cincotta et al.
patent: 5820353 (1998-10-01), Beylich et al.
patent: 5857838 (1999-01-01), Wagner, Jr.
patent: 5884472 (1999-03-01), Presz et al.
patent: 6082635 (2000-07-01), Seiner et al.
patent: 6082713 (2000-07-01), King
patent: 6155796 (2000-12-01), Schmalz et al.
Presz, Jr. Walter M.
Werle Michael J.
Flodesign, Inc.
Freay Charles G.
Holland & Bonzagni, P.C.
Holland, Esq. Donald S.
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