US PATENT SUBCLASS 411 / 26
.~.~ Both wedges provided with thread cooperating 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  DF  .~ Oppositely acting double wedge expander means {3}
26.~.~ Both wedges provided with thread cooperating means

DEFINITION

Classification: 411/26

Both wedges provided with thread cooperating means:

(under subclass 24) Subject matter wherein a threaded shaft extends between the tapered elements, and each of the elements either are provided with thread means which coact with the shaft or are engaged by a driving member which is provided with shaft coacting thread means such that upon rotation of the shaft the tapered elements move towards or away from each other.