US PATENT SUBCLASS 411 / 72
.~.~.~ Circumferential rib

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}
71  DF  .~.~ Sleeve having external gripping means {2}
72.~.~.~ Circumferential rib {1}
73  DF  .~.~.~.~> And longitudinal rib

DEFINITION

Classification: 411/72

Circumferential rib:

(under subclass 71) Subject matter wherein the gripping means comprises a protuberance which extends around the sleeve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

455, for an impact driven fastener provided with integral locking means in the form of a circumferential rib on its shank.