Patent ID: 7144026

Claim:
A wheel chair comprising: a supporting base frame including at least one wheel attached thereto, and including a seat provided thereon for supporting users thereon, and including a back support pivotally attached to said base frame with a pivot axle, to allow said back support to be rotated and adjusted relative to said base frame to a selected angular position, said back support including a handle extended therefrom, and a hand grip pivotally attached to said handle, a housing secured to said base frame and having a hollow chamber formed therein, a shank slidably received in said chamber of said housing, and including a first end pivotally attached to said back support with a pivot pin, to allow said shank to be pivoted relative to said back support, and means for adjustably anchoring said shank to said housing, and to adjustably secure said back support to said base frame to selected angular position, said adjustably anchoring means including a coil spring member engaged onto said shank, and having an inner diameter smaller than an outer diameter of said shank, to allow said spring member to be engaged and clamped onto said shank.