Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Multipart
Patent
1995-02-21
1997-03-11
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Multipart
411291, 4119372, F16B 3708, F16B 3922
Patent
active
056094566
ABSTRACT:
A locking nut includes a main ring having a threaded bore, a front end face at one end of the bore and a counterbore at the other end of the bore. Actually, the threaded bore opens into the counterbore through a recess which in turn opens out of a shoulder that forms the end of the counterbore. The main ring also has threaded holes which open out of the recess around the threaded center bore. In addition to the main ring, the nut has a secondary ring which fits into the counterbore and against the shoulder of the main ring. In the region of the threaded holes the secondary ring is relieved to the extent that it has a lesser diameter than the recess. The secondary ring also has a threaded bore, the thread of which matches the thread of the bore for the main ring. Indeed, the threads for the two rings are cut in the same machining operation, so that no interruption in pitch exists between the threads of the two rings. Cap screws extend through the secondary ring at the recesses and into the threaded holes of the main ring, engaging the threads in those holes. When the cap screws are loose, the nut passes easily over the external thread of a threaded shaft or spindle. However, when the cap screws are turned down against the secondary ring, they deform the secondary ring in the region of its reliefs into the recess of the main ring, causing the threads of the secondary ring and main ring to in effect jam. The friction which develops locks the nut on the external thread.
REFERENCES:
patent: 171898 (1876-01-01), Wiles
patent: 518474 (1894-04-01), Wallace
patent: 619137 (1899-02-01), Casner
patent: 739716 (1903-09-01), Reid
patent: 1353382 (1920-09-01), Crissinger
patent: 1621227 (1927-03-01), Wetmore
patent: 1850917 (1932-03-01), Browne
patent: 2385159 (1945-09-01), Peters
patent: 4086946 (1978-05-01), Keen
patent: 4557652 (1985-12-01), Lundgren
patent: 5069587 (1991-12-01), Levenstein
patent: 5472245 (1995-12-01), Meske et al.
Advance Machine & Engineering, Adjustable Locknuts, Spieth catalog, pp. 1-12.
The Timken Corporation
Wilson Neill R.
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