Threaded – headed fastener – or washer making: process and apparat – Implement – e.g. – die – etc. – Screw threading die
Reexamination Certificate
2006-09-19
2006-09-19
Tolan, Ed (Department: 3725)
Threaded, headed fastener, or washer making: process and apparat
Implement, e.g., die, etc.
Screw threading die
Reexamination Certificate
active
07108607
ABSTRACT:
Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least a portion of the threaded portion. The fastener can include a single groove or multiple grooves. In certain preferred embodiments, the helix rotation angle of the groove is selected so that the shank has a continuous diameter to facilitate the thread forming process. In preferred embodiments, the fastener is cold forged and the threads are formed using a thread rolling die.
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Copy of the European Communication Search Report dated Aug. 17, 2004 (EP 04 25 3383).
Frommer & Lawrence & Haug LLP
Ryan, Esq. Matthew K.
SPS Technologies, Inc.
Tolan Ed
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