Importance

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Abstract

A backpack has a front pocket containing a plate and a pair of shoulder straps for holding the plate against the back of a user. A pressurizable, flexible and elastic bladder covers the plate and has inside surfaces with an embossed pattern for preventing sticking together of facing walls of the bladder to facilitating an initial inflation of the bladder. A pair of tubular extensions extend from the bladder and into the shoulder straps, one of the tubular extensions being for inflating and deflating the bladder. A mouth-inflatable check valve connected to extension is location so as to be accessible to the user for inflating the bladder and a valve cover is detachably connected over the entire mouth engageable perimeter of the check valve for keeping it clear. Semi-rigid liners in the shoulder straps near the bladder form channels for facilitating inflating and deflating of the bladder. A pair of cushion panels in, or separate from the backpack, include pluralities of offset parallel, partially filled air tubes spaced by webs for minimizing volume when there is nothing between the cushion panels.

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First Claim