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
1995-08-10
1997-05-27
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
411553, 403348, F16B 2100, B25G 300
Patent
active
056325860
ABSTRACT:
The twistlock comprises a housing with a shaft journalled into the housing with a cone formed on a first end of the shaft protruding from a top of the housing. The cone biseing elongate radially for passage through a first elongate slot of an upper container corner casting. An upper surface of the cone is bevelled so that sides of the first elongate can force the cone and shaft to rotate from a locked position to an unlocked position to enable passage through the first elongate slot, and a lower surface of said cone being bevelled so that the sides of the first elongate slot can force the cone and shaft to rotate from the locked position to the unlocked position. The shaft is biased by a spring into the locked position. A protrusion extending from a bottom of a central portion of the housing and comprises first, a part dimensioned to pass through a second elongate slot in the lower container casting and shaped allow at least some rotation within the second elongate slot, and a second part of the protrusion including two tongues diagonally opposed. The extremities of the tongues are positioned such that the protrusion can fit through said second slot in a first rotational position. Once the second part has passed through the elongate slot into the corner casting, the housing can be rotated to a second rotational position where a respective upper surface of the two tongues bear against diagonally opposed surfaces of the inside of the casting adjacent said slot.
REFERENCES:
patent: 4400856 (1983-08-01), Tseng
patent: 4591307 (1986-05-01), Clive-Smith
patent: 4732505 (1988-03-01), Gloystein
patent: 5062752 (1991-11-01), Takaguchi
patent: 5155960 (1992-10-01), Shaanan
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