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
Reexamination Certificate
2005-08-10
2008-03-18
Saether, Flemming (Department: 3677)
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
C411S021000, C411S417000, C411S520000
Reexamination Certificate
active
07344346
ABSTRACT:
A bolt and nut structure has a bolt nail, a nut nail and an elastic tube. The elastic tube has several outward plates, several convex blocks, a convex edge, and an elastic gap. The edge of the elastic tube has a ring hook. Inward plates on an inner side of the elastic tube will slide along a planar surface of the bolt nail but will engage an oval surface of the bold nail. Accordingly, the elastic tube is first placed in an interior space of the nut nail, an objected is then clamped between the bolt and nut nail, and the bolt nail is rotated 90 degree to fasten the object. The bolt nail can also be rotated 90 degree in an opposite direction to loosen the bolt nail. Therefore the bolt and nut structure are very convenient in use.
REFERENCES:
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patent: 2581288 (1952-01-01), Pletcher, Jr.
patent: 2582580 (1952-01-01), Bedford, Jr.
patent: 2967557 (1961-01-01), Tait et al.
patent: 3027670 (1962-04-01), Kramer et al.
patent: 3269251 (1966-08-01), Bass
patent: 5036674 (1991-08-01), Chang
patent: 5324147 (1994-06-01), Leon
patent: 5704752 (1998-01-01), Logerot
patent: 6688826 (2004-02-01), Agha et al.
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