US PATENT SUBCLASS 411 / 43
.~.~ Frangible mandrel

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}
39  DF  .~ Frangible member {3}
43.~.~ Frangible mandrel

DEFINITION

Classification: 411/43

Frangible mandrel:

(under subclass 39) Subject matter which includes a member for moving an expander element wherein the member is formed with a pull portion which is connected to the remainder of the member by a weakened section which fractures upon the application of a predetermined force thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

361, for a headed fastener provided with nonexpanded deformed collar having a frangible mandrel.

476, for a multiple prong impact driven fastener provided with frangible portion.