Air fan including waterproof structure

Details Air fan including waterproof structure Air fan including waterproof structure

1999-10-06

2000-12-12

Walberg, Teresa

Pumps

Motor driven

Electric or magnetic motor

F04B 1700

Patent

active

061589853

ABSTRACT:
An air fan capable of exhibiting an enhanced waterproof function while being simplified in structure. An end of an outer cylindrical wall of a motor support and that of a blade mounting wall are so formed that the end of the outer cylindrical wall is positioned outside the end of the blade mounting wall and a gap constituting a labyrinth structure is defined between both ends. The motor support also includes an inner cylindrical wall, which is fixedly mounted on an end thereof with a flange member including an annular flange extending outwardly in a radial direction. The inner cylindrical wall has a Length in an axial direction determined so that the annular flange is positioned in proximity to a suction port as compared with an outer opening of the gap.

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patent: 5910694 (1999-06-01), Yokozawa et al.
patent: 6079958 (2000-06-01), Qandil

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