(under subclass 52.1) Device wherein the (reentry) means directs the working fluid* from and back to the blade* or blade row along a circulatory path which lies entirely within an unconfined and unobstructed (i.e., open, nonpassageway) area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53.1+, for a cross flow runner incorporating a fluid vortex which directs working fluid to and from a blade set in open recirculation.
55.1+, for a turbine regenerative pump which has open recirculation of working fluid from and back to a blade set.
57.1+, for a device having plural, serially acting, and open recirculation means for the reentry of working fluid from and back to a blade or blade set.
225, for a device having an exit chamber axially offset from a runner which device may disclose structure which involves some open recirculation of working fluid from and back to a blade set.
