An elongated inflatable tubular device which is freely bendable, when inflated, in multiple directions about the longitudinal axis of the device. The device includes an elongated tubular member sealed at each end thereof to form a sealed inflatable air chamber. Spaced apart bendable folds are each formed...http://www.google.sh/patents/US6106349?utm_source=gb-gplus-sharePatent US6106349 - Inflatable flotation device
