US PATENT SUBCLASS 403 / 318
.~.~ Blocked key

Current as of: June, 1999
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403 /   HD   JOINTS AND CONNECTIONS

315  DF  INCLUDING ANCILLARY MEANS BLOCKING DISCONNECTION OF JOINT {3}
316  DF  .~ Blocker for assembled joint retainer {2}
318.~.~ Blocked key

DEFINITION

Classification: 403/318

(under subclass 316) Structure wherein the hampering means hampers the disassembly of two members retained by a key by blocking any movement of the key.