US PATENT SUBCLASS 411 / 17
.~.~ Mates with mandrel thread

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  DF  .~ Helical anchor {2}
17.~.~ Mates with mandrel thread

DEFINITION

Classification: 411/17

Mates with mandrel thread:

(under subclass 16) Subject matter wherein the means to effect the dimension increase includes a member having a helical rib formed on its exterior surface which member is inserted into and causes expansion of the spirally wound sleeve.