Fan inlet with curved lip and cylindrical member forming labyrinth seal
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United States of America Patent
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-
Jun 13, 1995
Grant Date -
N/A
app pub date -
Jun 17, 1993
filing date -
Jun 17, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
An improved plastic, injection-molded shroud/banded fan combination in which the shroud extends axially from an inlet portion to an outlet portion, and the outlet portion comprises means for connecting a heat exchanger to the shroud, More specifically, the shroud includes an inlet lip which is curved in cross-section and positioned at the inlet portion of the shroud. The lip extends radially inward and axially downstream from the inlet portion of the shroud to a trailing edge. An intermediate cylindrical wall is attached to said inlet lip. The intermediate cylindrical wall is positioned: 1) coaxially with the fan; and 2) radially between the inner surface of the shroud and portions of the outer surface of the fan band so as to form a wall-to-band radially restrictive running clearance.
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