Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having structure to restrict rotation of threaded – mating... – Comprising a thread lock
Patent
1991-06-03
1992-12-08
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having structure to restrict rotation of threaded, mating...
Comprising a thread lock
411324, 411419, 411947, 29456, 82160, F16B 3504, F16B 39284, B23B 2900
Patent
active
051692708
ABSTRACT:
The present invention relates to a compressible screw-type locking mechanism including an oversized locking screw and a tool for compressing and rotatively driving the oversized locking screw through a threaded bore. Formed about the top of the locking screw is a head portion and extending downwardly from the head portion is a threaded shaft. At least one longitudinal slot extends through the head and at least partially through the shaft to form a locking screw with plural resilient segments. The locking screw assumes a normal expanded state with its threaded pitch diameter being oversized with respect to its companion bore. The locking screw is compressed by engaging the head thereof with the tool. In one embodiment, the compression of the locking screw is achieved through a torquing action. In a second embodiment, the compression is achieved by the axial movement of the tool. In either case by relieving the applied torque or removing the tool from the locking screw head results in the locking screw expanding within the bore and assuming an interference or locked fit within the bore.
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Kennametal Inc.
Porcelli James G.
Wilson Neill R.
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