US PATENT SUBCLASS 416 / 132 A
.~.~ Flexible sheet or plate

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}
132 R  DF  .~ Sectional, staged or nonrigid working member {2}
132 A.~.~ Flexible sheet or plate

Unofficial Alpha Subclasses: R A B

DEFINITION

Classification: 416/132

(under subclass 131) Apparatus wherein the working member comprises (1) a plurality of relatively movable surfaces (2) a plurality of separate or divergent surfaces which react with the working fluid sequentially or (3) a surface which is nonself-supporting, such as a sail.