Threaded – headed fastener – or washer making: process and apparat – Process – Making externally threaded fastener – e.g. – screw or bolt
Reexamination Certificate
2008-05-20
2008-05-20
Tolan, Ed (Department: 3725)
Threaded, headed fastener, or washer making: process and apparat
Process
Making externally threaded fastener, e.g., screw or bolt
C470S008000, C470S016000
Reexamination Certificate
active
07374494
ABSTRACT:
The present invention relates to a method for manufacturing a bolt that includes an axis, including the steps of providing a metal rod, providing a die, extruding the metal rod through use of the die, cold forming the metal rod, at least in part, to provide a shaft and a head so that, the head includes a torque transferring structure, the head includes a flange located adjacent to the torque transferring structure, a generally cylindrical surface is located adjacent to the flange, and a sloping surface that extends from the generally cylindrical surface towards the axis, rolling a threaded surface into the shaft, and providing a plurality of grooves so that the grooves extend from an end of the bolt.
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Wang, Rui, Office Action from Chinese Patent Office for Chinese Patent Application No. 03819851, May 11, 2007. Pages 1-5, Chinese Patent Office.
Brewer Robert
Jakuszeski Gerard
Alden Dana Andrew
MacLean-Fogg Company
Tolan Ed
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