US PATENT SUBCLASS 416 / 141
.~ Plural articulation

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

131  DF  ARTICULATED, RESILIENTLY MOUNTED OR SELF-SHIFTING IMPELLER OR WORKING MEMBER {7}
141.~ Plural articulation

DEFINITION

Classification: 416/141

(under subclass 131) Apparatus wherein the impeller or working member is supported for movement about plural pivots or for universal movement about one pivot.

(1) Note. Impellers having a ball and socket mounting enabling the impeller to pivot about any axis of the mounting are included in this subclass.