US PATENT SUBCLASS 416 / 143
.~ Member movement in rotation plane

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

142  DF  WORKING MEMBER FOLDABLE, PIVOTABLE OR COLLAPSIBLE TO NON-USE POSITION {1}
143.~ Member movement in rotation plane

DEFINITION

Classification: 416/143

(under subclass 142) Apparatus comprising a rotary impeller wherein the folding, pivoting, collapsing or similar movement occurs in the plane of rotation.