Patent ID: 7188902

Claim:
A backupholstery adjustment device for a wheelchair comprising: a pair of front wheels, a pair of large wheels, a plurality of rails, a pair of armrests, a pair of footrests, a pair of L-shaped handles and an adjustable backupholstery which has a pair of inwardly arcuate lateral sides; two pairs of V-shaped linking plates symmetrically and spacedly secured to upper and lower portions of said inwardly arcuate lateral sides, each having a positioning rod with a rectangular base movably secured to an outer side thereof by screws; two pairs of symmetrical clamping plates symmetrically and spacedly secured to an upper and a lower portion of the pair of L-shaped handles positioned in registry with said V-shaped linking plates and each having a vertical slot facing each other; a pair of upper adjustment pieces each having a pair of through holes adjacent an inner end thereof and engaged with the vertical slots of said clamping plates and respectively secured to said clamping plates by bolts and nuts, a slit which is insertable by said positioning rods, a stopping portion abutting said slits and a plurality of positioning grooves positioned inside thereof engageable with said positioning rods; a pair of lower adjustment pieces each having a pair of through holes adjacent a lower end thereof and engaged with the vertical slot of said lower clamping plates and secured to said lower clamping plates by bolts and nuts, a slit abutting a stopping portion on top and a single positioning groove formed inside; whereby, said backupholstery is movably supported by said upper and lower adjustment pieces and inserting said positioning rods respectively into said slits and engaged within said positioning grooves.