Truck rear door opening mechanism

Details Truck rear door opening mechanism Truck rear door opening mechanism

B - Operations, Transporting

62

D

B62D 33/04 (2006.01) B60J 5/10 (2006.01) E05D 15/46 (2006.01) E05F 1/10 (2006.01) E05D 3/06 (2006.01)

Patent

CA 2320649

A four bar link is provided between a walled cargo area of a truck and a rigid rear cargo door. The effective length of the lower link of the four bar linkage is longer than that of the upper link such that the motion of the door is generally up and over the top of the truck body. An eccentric cam is joined to the upper link with a tensioned spring extending around the cam such that the spring slackens as the door opens. The cam is configured so that, as the door is opened, the spring slackens more slowly initially then more quickly. This allows the door to be moved initially mostly outwardly before moving significantly upwardly and still be effectively counterbalanced throughout its motion.

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