Threaded – headed fastener – or washer making: process and apparat – Process – Making internally threaded fastener – e.g. – nut
Reexamination Certificate
2010-05-19
2011-11-22
Ekiert, Teresa (Department: 3725)
Threaded, headed fastener, or washer making: process and apparat
Process
Making internally threaded fastener, e.g., nut
Reexamination Certificate
active
08062141
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 25 Aug. 2008, PCT/US07/64593, filed Mar. 22, 2007.
Ekiert Teresa
Pearne & Gordon LLP
R B & W Manufacturing LLC
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