US 5,700,199 AGranted

Method for sizing a lock nut

AssigneeIllinois Tool Works Inc.

InventorsNed J. Gruca, Michael E. Ward

Life of this patent

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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.

Claims10

Dependent claims

A method for making a lock nut engagable and retainable about a threaded shaft, the method comprising steps of:

threading a bore of a body member for receiving a threaded shaft;
deforming at least a portion of the bore to provide a shaft engaging means engagable with a threaded shaft disposed in the deformed bore;
sizing the deformed portion of the threaded bore with a threaded sizing tool by threading the sizing tool through at least the deformed portion of the threaded bore, the threaded sizing tool oversized relative to the deformed portion of the bore and undersized relative to any undeformed portion of the bore,
wherein the sized lock nut has a relatively consistent torque performance and a reduced statistical spread over several installation and removal cycles of the nut about the threaded shaft.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/628,982Filed 8 Apr 1996
Granted: 23 Dec 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16B 39/38
By special members on, or shape of, the nut or bolt: with a second part of the screw-thread which may be resiliently mounted
B21K 1/707
Of special shape, e.g. self-locking nuts, wing nuts: self-locking nuts
F16B
Devices for fastening or securing constructional elements or machine parts together
B21K
Making forged or pressed metal products

Family

No related US applications are recorded in the indexed filing history.

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