US PATENT SUBCLASS 470 / 28
.~.~ Rivet type

Current as of: June, 1999
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470 /   HD   THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS

1  DF  PROCESS {5}
27  DF  .~ Making headed fastener, e.g., rivet or nail, etc. {2}
28.~.~ Rivet type {3}
29  DF  .~.~.~> Hollow type {1}
31  DF  .~.~.~> Formed by extrusion
32  DF  .~.~.~> Formed by heat treatment {1}

DEFINITION

Classification: 470/28

Rivet type:

(under subclass 27) Subject matter wherein the fastener is provided with an end structure consisting of a polycrystalline metallic grain structure which when subjected to an externally applied force is plastically flowable.