Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc.
Reexamination Certificate
2007-03-21
2010-06-22
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
C411S179000
Reexamination Certificate
active
07740436
ABSTRACT:
A metal clinch fastener has portions thereof selectively hardened to enable use of the fastener with metal members of differing hardness values. The selective hardening of the fastener enables mounting with application of required forces for piercing and/or plastic deformation of the metal member without undesirable deformation or distortion of the fastener. The screw thread region or zone of the fastener has a relatively lesser hardness suitable and may be pre-threaded or later threaded by engagement with a thread forming screw.
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Notification of Transmittal of The International Search Report and The Written Opinion of the International Searching Authority, or the Declaration, dated Aug. 25, 2008, PCT/US07/64593, filed Mar. 22, 2007.
Pearne & Gordon LLP
R B & W Manufacturing LLC
Saether Flemming
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