F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/19
F16B 19/04 (2006.01) F16B 13/04 (2006.01) F16B 19/10 (2006.01)
Patent
CA 1057543
ABSTRACT OF THE DISCLOSURE Disclosed herein is a rivet type fastener composed of a female member and a male member, said female member com- prising a shank containing a blind hole in the basal portion and divided by radial slits into two or more sectorial parts in the forward portion and a flange provided with two pairs of downwardly extended opposed walls of which the opposed walls in one pair incorporate inclined cams one each on the undersides thereof and said male member comprising a head portion provided on the outer periphery thereof with a down- wardly extended arcuate wall incorporating therein inwardly projecting catches adapted to permit engaging contact with said inclined cams of the female member and an operating stem having a length greater than the depth of said blind hole in the female member, whereby the mutual union of the male and female members which serves to fasten given pieces in position is accomplished with added fastening force by allowing said catches of the male member to come into engaging contact with said inclined cams of the female member and subsequently rotating the male member around its axis relative to the female member.
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