Process of forming a twisted, spirally grooved member and the member formed thereby
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 11, 2001
Grant Date -
N/A
app pub date -
Apr 7, 2000
filing date -
Apr 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A novel process of forming a member, process of forming an extruded and axially twisted member, such as a drill, a fastener, a self-drilling/tapping fastener, and the member formed by the process is disclosed. The process includes the steps of: providing a blank; extruding a predetermined shape along at least a section of the blank, thereby forming at least two first portions and at least two portions on the extruded section; forming a head on the end of the blank to define a head and a shank; and axially twisting at least a section of the first and second portions a predetermined amount. As a result of the twisting step, each first portion forms a spiral along the length of the twisted section and each second portion forms a spiral along the length of the twisted section. The first portions alternate with the second portions and each second portion defines a spiral groove for transporting material along the length of the shank. The resulting member can be threaded along all or a portion of the shank.
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