Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Reexamination Certificate
2005-04-29
2010-02-09
Batson, Victor (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
C411S908000, C411S413000, C411S415000, C411S311000, C411S386000
Reexamination Certificate
active
07658581
ABSTRACT:
A threaded element of plastic material for a joining assembly has a uniquely formed thread profile of a small profile angle between 30° and 50° and a rounded crest of a relatively large radius of curvature. The gap between the revolutions of the thread is of a volume which exceeds that of the thread. In order to provide for a specific cutting geometry of the thread profile the threaded element comprises a plurality of angular segments which are radially offset with respect to each other such that adjacent angular segments provide cutting edges. Furthermore, a tool and a method for making such a joining assembly are disclosed.
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ICS Handbuch, Automatische Schraubmontage. ISBN 3-922885-64-0; 7, 8, S.115-121, S.93-95, S.241-243, S.244-245.
Batson Victor
Bollhoff Verbindungstechnik GmbH
Reese David C
Seyfarth Shaw LLP
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