US PATENT SUBCLASS 411 / 52
.~.~.~.~ Follower defined by corners of polygonal element

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}
44  DF  .~ Including sleeve and distinct tapered expander (e.g., anchor bolt type) {9}
49  DF  .~.~ Relative rotation preventing means {1}
50  DF  .~.~.~ Guide and follower {3}
52.~.~.~.~ Follower defined by corners of polygonal element

DEFINITION

Classification: 411/52

Follower defined by corners of polygonal element:

(under subclass 50) Subject matter wherein either the expander or a portion of the sleeve is of multisided cross section, and a corner of said cross section acts as the protuberance means.