Patent ID: 8936434
Filing Date: 2015-01-20
Classification: F04D

Abstract:
1. A portable fluid blower comprising: a housing having a central axis and defining a fluid flow path extending axially between an upstream inlet and a downstream outlet; a fan assembly comprising a rotary component that is operable to draw fluid into a first stage of the flow path and accelerate fluid incoming at the inlet by propelling the drawn fluid in the first stage radially outwardly to against the housing that diverts the fluid to a second stage of the flow path, the first stage bounded by a first housing surface portion that increases in diameter in a downstream direction over at least a portion of an axial extent of the first stage to guide radial outward movement of fluid in the first stage, the second flow path stage defined by facing second and third housing surface portions that cause the fluid from the first stage to be redirected to flow substantially fully axially in an annular space extending around the central axis between the first stage and a third stage, the fluid flowing from the third stage to and through the downstream outlet; and a drive for the rotary component, wherein the portable blower further comprises an elongate support upon which the housing and drive are supported, the elongate support having a length that is substantially parallel to the central axis of the housing.