Threaded – headed fastener – or washer making: process and apparat – Process – Making internally threaded fastener – e.g. – nut
Patent
1996-04-08
1997-12-23
Larson, Lowell A.
Threaded, headed fastener, or washer making: process and apparat
Process
Making internally threaded fastener, e.g., nut
B21D 5324
Patent
active
057001995
ABSTRACT:
A method for making a lock nut engagable and retainable about a threaded shaft wherein a body member having a bore is threaded for receiving a threaded shaft, and at least a portion of the bore is deformed to provide threaded shaft engaging means engagable with a threaded shaft disposed in the bore. The deformed portion of the bore is then sized with a threaded sizing tool that is oversized relative to the deformed portion of the bore and undersized relative to any undeformed portion of the bore to provide a sized lock nut with a relatively consistent torque performance and a reduced statistical spread over several installation and removal cycles of the nut about the threaded shaft.
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Gruca Ned J.
Ward Michael E.
Breh Donald J.
Buckman Thomas W.
Illinois Tool Works Inc.
Larson Lowell A.
O'Brien John P.
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