(under subclass 182.1) Device wherein the runner* comprises at least two working member blades* extending from a working fluid* flow directing surface, which surface (a) extends generally perpendicular to and radially away from the runner's axis of rotation, (b) is continuous from the center to the radial periphery, and (c) has a radial periphery which lies, at all points, at a greater radial distance from the runner's axis of rotation than the radially outermost point of any of the blades.
(1) Note. The blades usually extend from the flow directing surface in a direction parallel to the runner's axis.
(2) Note. The runner under this definition may be referred to as a semi-open impeller.
(3) Note. Patents in this subclass have been cross referenced to Class 416 where particular runner structure has been disclosed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
227, for a device including a runner comprising a flow confining continuous passage which may include a full circular shroud for blades.
SEE OR SEARCH CLASS 416, Fluid Reaction Surfaces (i.e., Impellers),
179+, for a rotor comprising a flow confining or deflecting web or shroud.
