F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/18
F16B 13/04 (2006.01) B21J 15/06 (2006.01) F16B 19/10 (2006.01)
Patent
CA 1251663
ABSTRACT The rivet comprises a tubular body having a shank having a rivet head at one end and an end portion of which is tapered externally and internally towards the other (tail) end. A stem, disposed in a bore of the body, has a stem-tail which projects from the head end and breaks off when the rivet is set, a plug in the bore, and a ter- minal head abutting the tail-end. The diameter of the plug is reduced progressively and stepwise towards the terminal head, providing an abutment and an annular groove between the terminal head and the abutment. Material of the end portion extends into the groove to maintain the body and stem assembled, and enters further into the groove during setting of the rivet. The rivet is set by pulling the stem tail while supporting the body, causing the shank to collapse into a bulge which provides a blind head. The external tapering of the portion promotes bulg- ing at a lower applied force than would otherwise be required. Loss of the plug is prevented by the abutting of body material in the groove against the abutment, assisted by friction between the body and splines on the plug which embed in a locking region of the body during setting.
467786
Archer Stephen
Denham Keith
Avdel Systems Limited
Ridout & Maybee Llp
LandOfFree
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