Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Comprising a thread lock
Reexamination Certificate
2007-02-20
2007-02-20
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having structure to restrict rotation of threaded, mating...
Comprising a thread lock
C411S416000, C411S437000
Reexamination Certificate
active
10939645
ABSTRACT:
A fastening arrangement comprising a thread-forming lobular screw and a member defining a non-tapped pilot hole therein. The screw has a shaft and a head joined to a proximal end of the shaft, the shaft defining a plurality N of lobes circumferentially spaced about a central longitudinal axis of the shaft, a thread being formed on an outer surface of the shaft. The pilot hole comprises a central portion of a diameter intermediate the minor and major diameters of the screw thread, and a plurality N of circumferentially spaced cutouts extending radially out from the central portion. A plurality of longitudinally extending edges parallel to the axis of the screw are defined at junctures between the cutouts and central portion of the pilot hole. The screw thread forms a thread in the member beginning at the longitudinal edges of the pilot hole.
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The European Search Report for European Application No. 05019781.3; Sep. 12, 2005; Date of Completion Nov. 22, 2005.
Griffin David C.
Kelly Thomas D.
Alston & Bird LLP
Saether Flemming
The Esab Group, Inc.
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