Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1988-03-07
1989-09-12
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 43, 411361, F16B 1304, F16B 1900
Patent
active
048654990
ABSTRACT:
The rivet comprises a tubular rivet body of deformable material, and an elongate stem extending through the bore of the body. The body comprises a cylindrical shank and an enlarged rivet head at one end of the shank. The rivet head may be integral with, or separate from, the shank. The stem includes a plug, and a stem-tail connected to the plug by a frangible breakneck. The plug has a terminal head for abutting the shank, whereby the shank can be axially compressed on pulling the stem-tail and thereby deformed to form a blind head, and a locking groove circumferentially of the plug for receiving material of the rivet head which, during installation of the rivet, will be swaged radially inwardly into the locking groove to lock the plug in the body. The locking groove is of helical form, as with a screw thread, and enables the plug to be removed from the body by rotation, thus facilitating disassembly of the installed rivet and its removal from a workpiece. Forming the rivet head separately from the shank further facilitates removal of the body from the workpiece after removal of the plug.
REFERENCES:
patent: 2061628 (1936-11-01), Huck
patent: 2061629 (1936-11-01), Huck
patent: 2527307 (1950-10-01), Huck
patent: 3204517 (1965-09-01), Looker
patent: 3915052 (1975-10-01), Ruhl
patent: 4376604 (1983-03-01), Pratt et al.
Avdel Limited
Wilson Neill R.
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