US PATENT SUBCLASS 416 / 127
.~.~ Concurrent adjustment

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

120  DF  PLURAL IMPELLERS HAVING RELATIVE MOVEMENT OR INDEPENDENT SUPPORTS {5}
124  DF  .~ Coaxial rotation {4}
127.~.~ Concurrent adjustment

DEFINITION

Classification: 416/127

(under subclass 124) Apparatus in which the coaxial impellers are arranged to be adjusted simultaneously by positive means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

128+, for oppositely rotating "free blade" impellers in which an adjustment caused by aerodynamic forces may or may not be simultaneous.