Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed fastener element with securing means and biasing spring
Patent
1982-08-04
1984-04-17
Zugel, Francis K.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed fastener element with securing means and biasing spring
24596, A44B 1700
Patent
active
044425716
ABSTRACT:
A self-ejecting fastener stud is provided for use with a fastener receptacle to form a fastener assembly for fastening two members together. The stud has an enlarged head portion and a shank portion extending therefrom adapted to extend through an opening in one of the members to be fastened and to engage with a receptacle mounted on the other of the two members to be fastened. The stud has a cam follower and the receptacle has a cam surface positioned so that engagement and relative rotation therebetween will shift the stud and receptacle between fastened and unfastened positions. The stud is adapted to be retained on the one member so that it can be shifted between an inserted position with the head adjacent the one member and an ejected position with the head spaced from the one member. A biasing spring is on the stud tending to direct the stud toward the ejected position so that when the stud is released from engagement with the receptacle the biasing spring will shift the stud to the ejected position. Mounting of the stud to the one member is facilitated by a resistant interference fit between the cam follower and a keyhole formed on the receiving surface.
REFERENCES:
patent: 1895672 (1933-01-01), Louchman
patent: 2340250 (1944-01-01), Murphy
patent: 2709290 (1955-05-01), Rosenthal
patent: 3136017 (1964-06-01), Preziosi
patent: 3327363 (1967-06-01), Knight et al.
patent: 3718950 (1973-03-01), Engstrom
patent: 4227287 (1980-10-01), Gunther
Davis George R.
Hildebrand Robert
Purcell Harold
Aschenbrenner Peter A.
Dzus Fastener Co. Inc.
Zugel Francis K.
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