Aerifying device for whirlpool bath or tub

Claim 1

For use with a by-pass vacuum motor having: an axial drive shaft; electrically-powered workings for rotating the drive shaft; blower means driven by rotation of the drive shaft and carried at one end portion thereof for supplying a primary flow of air; a blower casing separating the electrically-powered workings from the blower means, enclosing the blower means and having an air inlet for intake of air into such casing generally axially of the drive shaft at the blower means end of the drive shaft and air outlet means for discharging air from such casing generally radially of the drive shaft; and fan means mounted outside the blower casing and driven by rotation of the drive shaft for supplying a secondary flow of air to cool the electrically-powered workings; the improvement comprising a housing for mounting the by-pass vacuum motor with its axial drive shaft upright and its blower means at the bottom and adapting the by-pass vacuum motor for use as an aerifying device for baths or tubs, said housing comprising: a bowl portion having an upright peripheral wall encircling the blower casing and extending downward a substantial distance below the blower casing, said bowl portion having an air inlet and an air outlet and forming a first plenum for air discharged from the blower casing; and an air inlet conduit having one end portion sealed around the air inlet of the blower casing and the other end portion sealed around the air inlet of said housing bowl portion, said air inlet conduit extending through the first plenum formed by said bowl portion for conveying air from outside said bowl portion to the blower casing air inlet.