Closure fasteners – Seal bolts
Patent
1996-11-15
1998-06-23
Meyers, Steven N.
Closure fasteners
Seal bolts
292287, E05B 3902
Patent
active
057694702
ABSTRACT:
The present invention provides a container door lock pin which includes a bolt and a nut, which can lock a container door by simply pushing the bolt into the nut without needing to screw it in, and which makes it possible to visually confirm locking. The bolt has a head at its rear end and a shank. The shank has an annular groove formed in its periphery at the first position spaced from the bolt front end by a first distance. A ring spring is fitted in the groove. The nut has a bore for slidable engagement with the shank. The bore has a first annular groove formed near the nut front end. An elastic rigid confirmation seal plate is fitted in the first groove. The bore includes a cylindrical portion, which extends between the first groove and the second position spaced rearward from the first groove by a second distance, and a conical portion, which extends between the second position and the nut rear end. The cylindrical portion has a diameter adapted for slidable engagement with the shank, and a second annular groove for engagement with the spring. The second groove is formed at the third position spaced rearward from the first groove by a third distance, which is shorter than the first distance between the bolt front end and the bolt groove. The conical portion widens rearward.
REFERENCES:
patent: 1397101 (1921-11-01), Kelly
patent: 2033371 (1936-03-01), Benaggio
patent: 2228738 (1941-01-01), Thomson
patent: 2319753 (1943-05-01), Smith
Estremsky Gary
Meyers Steven N.
Toyomura Marine Engineering Co., Ltd.
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