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
1995-08-16
1997-01-14
Wilson, Neill R.
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
411350, 411553, 403325, 403348, F16B 2100, B25G 318
Patent
active
055932657
ABSTRACT:
A stored energy torsional rotary fastener device providing ready releasable attachment of first and second components. A fastener housing, attached to the first component, includes a cylindrical socket having an upper open end and a lower end configured by a pair of base segments defining a cross-slot the parallel edges of which are formed with concentrically disposed arcuate cutouts. The segments have interior helical pitched ramp portions establishing an interrupted thread support. A rotor, including an axial stem terminating in a radial disc axially positioned in the socket, is rotatably biased by a coiled spring interconnecting the rotor and housing. The rotor disc is formed with a depending axial hub having its lower portion journalled in the slot cutouts. The hub upper end includes oppositely extending radial lugs, with each lug underface formed with a helical pitch adapted to mate with an associated ramp portion, enabling axial threaded rotor travel. The hub terminates in an annular shoulder, encircling a lower axial stem, which stem ends in a cross-head adapted to extend through the cross-slot, with the cross-head providing an upwardly facing engaging surface. Threading the rotor in one direction advances it to a "cocked and armed" mode with the lugs having diametrically opposite corner junctures rotatably biased against an associated cross-slot edge. Upon the cross-head being inserted through a second component mating slot the shoulder is displaced upwardly releasing the lugs, whereby the spring threads the rotor in the opposite direction such that the cross-head urges the components into engagement.
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Chrysler Corporation
Pasternak Thomas G.
Wilson Neill R.
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