US PATENT SUBCLASS 411 / 37
.~.~ Bulged portion having additional gripping means

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}
34  DF  .~ Bulged by axially contracting ends {4}
37.~.~ Bulged portion having additional gripping means

DEFINITION

Classification: 411/37

Bulged portion having additional gripping means:

(under subclass 34) Subject matter wherein the holding device or anchor includes means carried by and in addition to the expanded portion which means is forced into penetrating or frictional engagement with a part into which the holding device or anchor is inserted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

71+, for an anchor or holding device in the form of a tapered expander and a sleeve having external gripping means.

451.1+, for an impact driven fastener having integral locking means on its shank.