Patent ID: 6579060
Filing Date: 2003-06-17
Classification: A47L,F04D

Abstract:
An impeller and housing assembly, comprising:a shaft; a housing comprising: a plurality of walls, wherein one of said walls comprises a volute, a first axis, an inlet port aligned with said first axis, wherein said shaft is oriented parallel to said first axis, an outlet port located on a second axis spaced from said first axis, and an exhaust passage which extends from said outlet port; an impeller mounted on said shaft for rotation, said impeller being located in said housing between said inlet port and said outlet port and comprising: a hub, and at least one blade extending from said hub, wherein said at least one blade is located entirely on a first side of a plane approximately parallel to said second axis and any discontinuity in said housing is entirely located on a second side of said plane, said housing having an airflow path free of airflow chopping discontinuities between the impeller and the outlet port.