An automatic twistlock is disclosed in the present invention, comprising a shaft journalled for rotation in a housing. The housing comprises an upper portion for registering with a slot in a corner casting of an international shipping container. The shaft extends out of the top of the upper part of the housing and has a cone fixed thereto for rotation with the shaft, between a disengaged position aligned with the slot and an engaged position straddling the slot. A biasing means acts between the housing and the shaft to bias the shaft and thus the cone to the engaged position. A downwardly facing surface of the cone comprises four lower quadrants defined around a pivot axis of the shaft. At least one lower quadrant comprises a lower contact path for contact with a side of the slot. The lower contact path is angled upwardly and laterally outwardly so that on drawing the container upwardly the side of the slot urges the cone and hence the shaft to rotate against the action of the biasing means toward the disengaged position and thus release from the corner casting. The lower contact path comprises an initial lower contact part and a further lower contact part. The initial lower contact part is shaped so that more lift of the container is required to give a unit of rotation than the further lower contact part thus requiring less force to lift the container.
Automatic Twistlock
26.08.2015
Patent
Elektronische Ressource
Englisch
IPC: | B65D Behältnisse zur Lagerung oder zum Transport von Gegenständen oder Materialien [Container], z.B. Säcke, Beutel, Fässer, Flaschen, Dosen, Kästen, Büchsen, Schachteln, Packkörbe, Tonnen, Gläser, Flüssigkeitsbehälter, Trichtersilos, Transportbehälter , CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES |
When is a twistlock not a twistlock?
British Library Online Contents | 1996
|When is a twistlock not a twistlock?
Online Contents | 1996
|