Patent ID: 7147528

Claim:
A device, comprising: a spring configured to form a closed loop, the spring being moveable between a coiled configuration when the spring is collapsed and an uncoiled configuration when the spring is expanded, the spring defining a circumference while in the uncoiled configuration, the spring having a first end and a second end; a connector defining an opening at a first end portion and an opening at a second end portion, the opening at the first end portion configured to receive the first end of the spring, the opening at the second end portion configured to receive the second end of the spring; a first portion of the device having a perimeter; a second portion of the device coupled to the first portion proximate the perimeter, the first portion of the device and the second portion of the device collectively defining an inflatable chamber, the entire spring being disposed between the first portion of the device and the second portion of the device; and a valve coupled to the inflatable chamber.