Threaded – headed fastener – or washer making: process and apparat – Implement – e.g. – die – etc. – Tap
Reexamination Certificate
2004-08-02
2009-08-18
Tolan, Edward (Department: 3725)
Threaded, headed fastener, or washer making: process and apparat
Implement, e.g., die, etc.
Tap
C470S198000
Reexamination Certificate
active
07575520
ABSTRACT:
The present invention provides a tap (10) adapted for formation of female screw-threads in a plurality of metal parts. Each female screw-thread is capable of imparting translational motion to a threaded second member engaged therewith, the threaded second member having a matching male screw-thread and the translational motion occurring on relative rotation between the first metal part and the threaded second member. The tap (10) is fluteless and comprises a threaded portion (23) with a triangular form thread (11) with an angle of thread (gamma) in the range 29°-40° and radiussed crests (16). The present invention also relates to a method of using such a tap.
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Examination Rep, Oct. 9, 2007, European Patent Office.
Adcock Technology Limited
Gable & Gotwals
Tolan Edward
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