Patent ID: 8875347

Claim:
A hinge system for a cushion seat back comprising: a shaft with a first end and a second end, said shaft first end connected to a bracket, said bracket affixed to said cushion seat back, said shaft second end secured by a locking key in a central aperture of a main gear, said main gear having a radius and a circumference, a plurality of teeth equally distributed radially outward about the circumference, a plurality of apertures passing through said main gear, said plurality of apertures equidistant from one another, said plurality of apertures intermediate said central radius and said plurality of teeth, a pawl with a tongue, said pawl rotatably fixed proximal said plurality of teeth, said pawl having a lower portion and an upper portion, said lower portion having several teeth, said upper portion having no teeth, a first set screw and a second set screw, said first set screw fixed in one of said plurality of apertures above said pawl said upper portion, said second set screw fixed in a second one of said plurality of apertures below said pawl said lower portion, a spring having a body and an elongated tail, said spring body fixed in the one of said plurality of apertures above and adjacent said first set screw, said elongated tail traversing from said spring body to a position above and in contact with said second set screw, said pawl several teeth inter-meshed with an equal number of said plurality of teeth whereby when said cushion seat back is lifted up from an initially flat position, said shaft rotates said main gear, and said pawl several teeth are displaced from said equal number of said plurality of teeth to a second set of equal number of said plurality of teeth, locking said seat back at a second position equal to the position where said cushion seat back was lifted up.