Patent ID: 9188137
Filing Date: 2015-11-17
Classification: F04D

Abstract:
1. A blower housing, comprising: a discharge direction; an axis of rotation; a polar axis that, when the blower housing is viewed orthogonally relative to the axis of rotation, originates from the axis of rotation and extends through a relatively larger fluid flow area of the blower housing both perpendicularly away from the axis of rotation and perpendicularly relative to the discharge direction, wherein a rotational direction of increasing angular values relative to the polar axis is the rotational direction in which an initial offset from the polar axis occurs generally in the discharge direction; an angular sweep of increasing fluid flow cross-sectional area that begins at 90 degrees as measured from the polar axis and ends at 390 degrees as measured from the polar axis; an axial expansion that extends along the entirety of the angular sweep, wherein the axial expansion comprises an increasing distance between a first sidewall and a second sidewall with an increasing angular value relative to the polar axis; and an axial contraction located at an angularly greater value than the angular sweep, wherein the axial contraction comprises a progressively decreasing distance between the first sidewall and the second sidewall with an increasing angular value relative to the polar axis, and wherein a fluid flow cross-sectional area of the axial contraction is equal to or greater than the greatest fluid flow cross-sectional area of the angular sweep.