(under the class definition) Apparatus comprising a runner* wall having an even, substantially uninterrupted or
bladeless* surface over which the working fluid* flows, the friction of the contact layer between the runner* and the fluid being the only cause of motion of the runner* or of the fluid.
SEE OR SEARCH CLASS
198, Conveyors: Power-Driven,
643, for an endless belt or chain-like member adapted to lift a viscous fluid from a body thereof as a result of the property of the fluid to adhere to the member.
416, Fluid Reaction Surfaces (i.e., Impellers),
4, or a rotary skin friction-type rotor having a smooth substantially uninterrupted skin surface which contacts fluid such that reaction between the rotor and the fluid occurs solely as a result of friction, in the absence of a claimed casing* or other fluid distributing means*.
