Patent ID: 7037084

Claim:
A method of providing a cooled blower unit, comprising the steps of: rotating a feed air impeller in a casing, said casing having a casing inlet and at least one aperture outlet; rotating a cooling air impeller at a rear of a motor and said feed air impeller at a front thereof; providing a shroud having a chamber adjacent said casing, said motor being retained in said shroud, providing at least one passage from said chamber to a shroud outlet in said shroud; retaining said shroud in a housing, forming at least one air opening and a housing outlet in said housing, said housing outlet receiving said shroud outlet; rotating said cooling air impeller to draw inlet air through said at least one air opening, said inlet air flowing between said motor and said shroud, said inlet air flowing out of said shroud and said housing; and rotating said feed air impeller to draw said inlet air between said shroud and said housing into said casing inlet, said feed air impeller forcing air through said at least one aperture outlet to said housing outlet.