Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1998-08-24
1999-06-22
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 38, 411 55, F16B 1304, F16B 1306
Patent
active
059136480
ABSTRACT:
A rotatably fastening blind rivet is provided. The blind rivet includes a tubular rivet body of ductile material and an elongate stem engaged into the rivet body which has a radially enlarged rivet head of hexagon configuration at one end having a serrated surface and a central bore, a threaded inner periphery of predetermined pitch and number of threads in an upper region and a progressively introversion inner periphery in a lower region of the body. The stem includes a cylinder shank of threaded outer periphery engageable with the threads of the rivet body, a breakneck on the top of the shank from which a tensioning rod of hexagon spiral outer periphery extends upward and is slidably engageable with the central bore of the rivet head and a terminal head of stiffness material at a lower end of the shank remote from the rod having serrated surface toward the shank. In installation, the tensioning rod is rotated mechanically or manually to provide proper torque to force the upward movement of the terminal head which in turn presses the tubular body to be radially deformed to become a blind head against a workpiece.
REFERENCES:
patent: 4699552 (1987-10-01), Jeal
patent: 4950115 (1990-08-01), Sadri
patent: 5152648 (1992-10-01), Pratt
patent: 5238342 (1993-08-01), Stencel
patent: 5498110 (1996-03-01), Stencel et al.
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