US PATENT SUBCLASS 416 / 221
.~.~.~ Resilient or deformable

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

204 R  DF  SPECIFIC WORKING MEMBER MOUNT {9}
219 R  DF  .~ Blade received in well or slot {2}
220 R  DF  .~.~ Having blade locking means {2}
221.~.~.~ Resilient or deformable

DEFINITION

Classification: 416/221

(under subclass 220) Apparatus wherein the fastening member comprises elastic or distortable material.