Helical groove fasteners and methods for making same
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United States of America Patent
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Sep 19, 2006
Grant Date -
Jun 23, 2005
app pub date -
Feb 4, 2005
filing date -
Jun 5, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
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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