US PATENT SUBCLASS 411 / 16
.~ Helical anchor

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

15  DF  HAVING SEPARATE EXPANDER MEANS {13}
16.~ Helical anchor {2}
17  DF  .~.~> Mates with mandrel thread
18  DF  .~.~> With wedge-shaped expander

DEFINITION

Classification: 411/16

Helical anchor:

(under subclass 15) Subject matter wherein the holding device or anchor includes a wound means forming a sleeve.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

705+, for a socket type anchor having a helical feature on its exterior surface, and see the note in subclass 698 for the line.