US PATENT SUBCLASS 52 / 681
.~.~.~ Penetrating leg traversing separate stop

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
677  DF  .~ Spacer-positioner; e.g., rebar chair {5}
679  DF  .~.~ Penetrator with limiting stop {2}
681.~.~.~ Penetrating leg traversing separate stop {2}
682  DF  .~.~.~.~> Cup, bulb, or U-shaped stop
683  DF  .~.~.~.~> Block-type stop

DEFINITION

Classification: 52/681

(under subclass 679) Structure including a headed, penetrating type fastener and a separate spacer or stop through which the fastener passes.