Separate means upstream and downstream of blade set:
(under subclass 148) Device comprising two such vanes* or other control means, one such vane or other control means directing the working fluid* onto a row of runner* blades* and a second such vane or other control means receiving working fluid from the same row or a different row of runner blades.
(1) Note. The two means need not be positioned adjacently upstream and downstream of one row of runner blades.
(2) Note. This subclass does not include a device merely comprising a single vane, vane row, or other control means which (a) directs the working fluid onto a row of runner blades when the working fluid is flowing through the device in one direction and (b) receives the working fluid from the row of runner blades when the working fluid is flowing through the device in an opposite direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
151+, for a device having a selectively adjustable vane or working fluid control means located upstream of the runner.
