US Patent 7770766 Rucksack with a belt assembly enabling angular pivoting

A rucksack comprising a bag having a back panel and, among other things, a belt assembly and a rigid frame secured to the back panel and the belt assembly. According to the invention, the bottom portion of the rigid frame has a V-shaped configuration with an angle α at the apex, and in its middle and rear portion, the belt assembly includes an upwardly open pocket having a V-shaped configuration with an angle β at the apex, where β is greater than α, such that said pocket is suitable for serving as a housing for receiving the V-shaped bottom portion of the frame while allowing the belt assembly to pivot angularly to some extent relative to the remainder of the rucksack.