Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1994-05-31
1996-08-20
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411386, 411418, F16B 3504, F16B 3712
Patent
active
055473237
ABSTRACT:
A threaded bush having a cylindrical body provided with a female thread in an inner surface, a male thread in an outer surface, a plurality of triangular recessed stop grooves spaced equally in a lower sloping-down portion, each stop recessed groove formed with a vertical side wall and a curved side wall defining a small angle, the curved side wills guiding and cutting in a wall of a hole which this bush is to be screwed in, the vertical side wall cutting positively the wall of the hole, the triangular recessed stop grooves engaging uncut wall material of the hole to prevent this bush from loosening out of the hole.
REFERENCES:
patent: 2823574 (1958-02-01), Rosan
patent: 3451080 (1969-06-01), McIntyre et al.
patent: 3866509 (1975-02-01), Kraus et al.
patent: 3866510 (1975-02-01), Eibes
patent: 4223585 (1980-09-01), Barth et al.
patent: 4449874 (1984-05-01), McKinney
patent: 4730968 (1988-03-01), Diperstein et al.
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