Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1986-01-28
1987-10-13
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 54, 411 55, 411282, F16B 1304
Patent
active
046995528
ABSTRACT:
A three piece blind fastener of the kind comprising a tubular nut having a head at one end and a tapered nose at the other end, an expansible sleeve, and a headed bolt threadedly engaged with the nut for forcing the sleeve on to the nose of the nut to form a blind head, has the thread of the nut provided with a locking zone in which the bore of the nut is constricted and, in cross sectional shape, a closed non-reentrant non-circular curve so that the nut resiliently interferes with the bolt.
A die, and a method of providing the nut with the locking zone by means of the die are disclosed. The die has a tapered aperture having a cross sectional shape corresponding to the desired shape of the locking zone, and the method involves forcing the tapered nose of the nut into the aperture so as to constrict the bore, in a zone spaced from its ends, to the desired extent and impose the non-circular cross sectional shape on the constricted zone.
REFERENCES:
patent: 2286982 (1942-06-01), Todd
patent: 2765699 (1956-10-01), La Torre
patent: 3129630 (1964-04-01), Wing et al.
patent: 3434262 (1969-03-01), Lawrence
patent: 3643544 (1972-02-01), Massa
patent: 4291737 (1981-09-01), McMurray et al.
Advel Limited
Smith Gary L.
Wilson Neill
LandOfFree
Blind fastener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blind fastener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind fastener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-409039