US PATENT SUBCLASS 411 / 24
.~ Oppositely acting double wedge expander 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}
24.~ Oppositely acting double wedge expander means {3}
25  DF  .~.~> Outwardly moving
26  DF  .~.~> Both wedges provided with thread cooperating means
27  DF  .~.~> Having rotation preventing means {1}

DEFINITION

Classification: 411/24

Oppositely acting double wedge expander means:

(under subclass 15) Subject matter wherein the anchor or device includes a pair of oppositely disposed tapered elements which increase the circumferential extent of the holding device or the anchor by their relative movement axially toward or away from each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44+, for an anchor or holding device in the form of a sleeve and tapered expander.

75+, for an anchor or holding device having sliding wedge surfaces.