.~ Having fluid-driven rotatable radial blade (e.g., pinwheel) {1}
218
.~.~ Rollable or having plural rotating bladed members
DEFINITION
Classification: 446/218
Rollable or having plural rotatable bladed members:
(under subclass 217) Device wherein (1) the fluid reaction surfaces are rotatably carried on a support which is adapted to have rolling contact with a supporting surface, or is supported on a generally round rotatable element upon which it may be rolled along a supporting surface, or (2) a second discrete set of fluid-reaction surfaces is provided which extend radially from an axis about which they are caused to revolve.
