Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Cap over the head
Patent
1995-12-26
1997-08-05
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Cap over the head
F16B 3714
Patent
active
056535643
ABSTRACT:
A screw head cap having a cap portion, a washer portion, a skirt portion turned down from a capping main body portion and an upstand portion turned up from the washer portion. The inner periphery of the skirt portion is inwardly turned down at an angle ranging from eighty to eighty-five degrees to a horizontal plant of the cap portion, while the outer periphery of the upstand portion is outwardly turned up from a base portion thereof at an angle ranging from eighty to eighty-five degrees to a horizontal plane of the washer portion, corresponding to the inwardly turned down angle of the inner periphery of the skirt portion. The thickness of the capping main body potion is nearly homogeneous and is proportional to 0.7 to 0.95 of the maximum thickness of the skirt portion.
REFERENCES:
patent: 2857597 (1958-10-01), Morgan
patent: 4154138 (1979-05-01), Melone
patent: 4214505 (1980-07-01), Aimar
patent: 4601624 (1986-07-01), Hill
patent: 5068956 (1991-12-01), Malewicz
patent: 5103538 (1992-04-01), Ryder
Saether Flemming
Shinagawa Shoko Co., Ltd.
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