Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Patent
1992-05-19
1995-12-12
Kwon, John T.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
4151821, F04D 2942
Patent
active
054744229
ABSTRACT:
A volute housing is provided for a centrifugal fan, blower or the like which includes a housing body defined by opposite spaced walls, and in another embodiment of the invention, the opposite spaced walls are snap-secured to a central wall. The sidewalls are defined by radially innermost, medial and radially outermost sidewall portions with the innermost sidewall portions being of a generally concave configuration and the radially outermost sidewall portions extending generally 180.degree.. The radially outermost sidewall portions and the medial sidewall portions have a minimum radius and an axial length respectively at a first zone adjacent a tongue of an associate volute chamber while the radially outermost sidewall portions and the medial sidewall portions have a maximum radius and an axial length respectively at a second zone adjacent a throat of the volute chamber. The minimum radius and axial length each progressively increase from the first zone to the second zone with the arcuate distance therebetween approaching generally 360.degree. but being preferably substantially 350.degree..
REFERENCES:
patent: 3856431 (1974-12-01), Tucker
patent: 5069599 (1991-12-01), Carretta
patent: 5141397 (1992-08-01), Sullivan
patent: 5156524 (1992-10-01), Forni
patent: 5257904 (1993-11-01), Sullivan
patent: 5281092 (1994-01-01), Sullivan
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