Patent ID: 7805932

Claim:
A flow assembly for promoting turbulent flow, comprising: a housing including a lumen extending from a proximal aperture to a distal aperture; a first set of stationary blades including a plurality of first blades disposed within the lumen and positioned at a first positive angle relative to a longitudinal axis of the housing, wherein each of the plurality of first blades extends from the housing only partway across the lumen toward a center of the lumen, is connected by a common base at the housing, includes a free distal end at least partially defining a central passageway, and is positioned between the proximal aperture and the distal aperture; and a second set of stationary blades including a plurality of second blades disposed within the lumen and positioned at a second negative angle relative to the longitudinal axis of the housing, wherein each of the plurality of second blades extends from the housing only partway across the lumen toward a center of the lumen, is connected by a common base at the housing, includes a free distal end at least partially defining the central passageway of the housing, and is positioned between the first set of stationary blades and the distal aperture, wherein the central passageway is substantially free of blades and extends from the proximal aperture to the distal aperture.