Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1981-03-11
1983-09-20
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 45, 411 57, F16B 1304
Patent
active
044052723
ABSTRACT:
The fastener of the invention has a sleeve-like body with a laterally enlarged head at a rear end thereof, a fixed diameter rear portion forwardly adjacent to the head, and at least three forwardly opening longitudinal slots defining as many forwardly projecting legs. A plunger insertable into the body to a forward operative position holds the front ends of the legs flexingly diverged to confine the fastener in a blind hole. At its front end each leg has a radial protuberance with a flat rear surface, the rear surfaces of the protuberances being coplanar and normal to the body axis when the legs are diverged. A rearwardly facing circumferential shoulder on the plunger is engaged by detent lugs in the body, near the rear ends of the slots, to define a preliminarily assembled position of the plunger and is detentingly engaged by forwardly facing surfaces on the legs, near their front ends, in the operative position of the plunger.
REFERENCES:
patent: 2542144 (1951-02-01), Kearns
patent: 2813568 (1957-11-01), Kilmarx
patent: 2941439 (1960-06-01), Rapata
patent: 3449799 (1969-06-01), Bien
patent: 3728761 (1973-04-01), Holly
patent: 4276806 (1981-07-01), Morel
Britts Ramon S.
Nilles James E.
Phillips Plastics Corporation
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