Patent ID: 8789730

Claim:
A backpack comprising: a main frame and an associated strap assembly to mount said main frame to a back of a transporter; a collapsible stretcher mounted to said frame and transformable while said main frame is mounted to the back of said transporter from a compact mode for portability with said main frame to an extended mode supported at a proximal end by the main frame and adapted to carry an individual with a distal end engaging the terrain, said stretcher comprising: a pair of telescoping rails; a flexible carrier connecting said rails; a crossbar connecting at one end of each rail pair; an axle assembly disposed at a second end of each rail pair and extendable to provide a pair of wheels which are transversely spaced from said rails; wherein in a compact mode said proximal end of said collapsible stretcher is hingeably connected to said main frame at a first location and said rails are retracted and are secured to said main frame at a second location, in the extended mode said crossbar is hingeably connected to said main frame, and said rails and axle assembly are extended so that said wheels are engaged with the terrain to permit transport of said individual placed on said stretcher while the main frame is mounted via the strap assembly to the back of said transporter.