Breaking type expansion fastener

Details Breaking type expansion fastener Breaking type expansion fastener

1987-09-11

1989-05-23

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Frangible member

411 39, 411 48, 411 60, F16B 1304

Patent

active

048325473

ABSTRACT:
An expansion fastener comprises a female member including a cylindrical portion, a flange portion and a plurality of elastic leg portions, and a male member including a shaft portion to be fitted in the cylindrical portion, a head portion provided at the upper end of the shaft portion and a leg portion expanding portion for causing outward deformation of the elastic leg protions. The cylindrical portion of the female member has a reduced-thickness break portion which extends along an overlap plane along which two plates overlap each other, and a radially inwardly constricted break portion is provided between the shaft portion and head portion of the male member.

REFERENCES:
patent: 4276806 (1981-07-01), Morel
patent: 4375342 (1983-03-01), Wollar et al.
patent: 4637765 (1987-01-01), Omata

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