Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Thread structure
Patent
1993-01-28
1994-07-05
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Thread structure
411908, F16B 3716
Patent
active
053262085
ABSTRACT:
A nut for turning onto a threaded stud and having a smooth bore extending from an inwardly-tapering conical lead-in area, the nut being characterized in that in the lead-in area a stripping zone is formed by a plurality of parallel tubular cavities of smaller diameter than the bore of the nut, in that the cavities are spaced apart and arranged symmetrically about the axis of the bore of the nut, in that the axis of each tubular cavity is spaced from the axis of the bore of the nut by a distance smaller than the sum of the radii of the tubular cavity and of the bore and greater than the radius of the bore, in that the intersections of the walls of each tubular cavity with the wall of the bore of the nut form cutting edges, and in that the respectively adjacent tubular cavities are linked to one another via cavities provided therebetween so that a coating stripped from the threaded stud as the nut is turned onto the stud can be accommodated in this cavity.
Preferably, the nut has three tubular cavities which are linked together by three linking cavities.
REFERENCES:
patent: 3075272 (1963-01-01), Buyken
patent: 3491646 (1970-01-01), Tinnerman
patent: 4299520 (1981-11-01), Iwata
patent: 4889460 (1989-12-01), Laidlaw et al.
patent: 4907930 (1990-03-01), Peterson
Emhart Inc.
Murphy Edward D.
Wilson Neill R.
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