Pumps – Motor driven – Motor within rotary pumping member
Patent
1987-06-26
1988-03-29
Reese, Randolph A.
Pumps
Motor driven
Motor within rotary pumping member
417423R, 415207, 415213C, F04D 2508, F04D 2944
Patent
active
047340150
ABSTRACT:
An axial-flow fan, particularly a small fan which is axially compact, with a scroll plate surrounding the impeller and whose inner contour has a cylindrical configuration in the vicinity of the axial median plane and extends both towards the inlet side and the outlet side in a polygonal, particularly square profile accompanied by the formation of corner areas, and with a central, coaxial core formed by the drive motor, the impeller hub and the mounting flange for the drive motor; the core thereby has an annular surface conically tapering towards the inlet side face whose axial length is at least one-third of the hub length; with respect to the axial median plane, the scroll plate is asymmetrical in the corner areas and is made cylindrical over a longer distance from the axial median plane to the inlet side than to the outlet side.
REFERENCES:
patent: 3229897 (1966-01-01), Papst
patent: 3334807 (1967-08-01), McMahan
patent: 4164690 (1979-08-01), Muller et al.
patent: 4167376 (1979-09-01), Papst
patent: 4221546 (1980-09-01), Papst et al.
patent: 4225285 (1980-09-01), Sturm
patent: 4373861 (1984-02-01), Papst et al.
patent: 4428719 (1984-01-01), Hayashibara et al.
patent: 4482302 (1984-11-01), Grignon
patent: 4564335 (1986-01-01), Harmsen et al.
Cuomo Peter M.
Papst-Motoren GmbH & Co. KG
Reese Randolph A.
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