Patent ID: 7931288

Claim:
A medical wheelchair, comprising: a support frame; a front bracket pivotally connected with the support frame; a rear bracket pivotally connected with the support frame; a mounting bracket pivotally connected between the front bracket and the rear bracket; a drive mechanism mounted between the support frame and the mounting bracket to drive the mounting bracket to move relative to the support frame; wherein the support frame includes a bottom bracket and two upright armrest supports mounted on and extended upwardly from the bottom bracket; the bottom bracket of the support frame has two opposite sides each provided with a first pivot portion and a second pivot portion; the bottom bracket of the support frame has a rear end provided with a third pivot portion; the front bracket has two opposite sides each having a lower end provided with a first pivot hole pivotally connected with the respective first pivot portion of the support frame and an upper end provided with a first pivot shaft; the rear bracket has two opposite sides each having a lower end provided with a second pivot hole pivotally connected with the respective second pivot portion of the support frame and an upper end provided with a second pivot shaft; the mounting bracket includes two side rails each pivotally connected between the front bracket and the rear bracket and a crossbeam mounted between the two side rails; each of the two side rails of the mounting bracket is provided with a first pivot sleeve pivotally connected with the respective first pivot shaft of the front bracket and a second pivot sleeve pivotally connected with the respective second pivot shaft of the rear bracket; the crossbeam of the mounting bracket is provided with a fourth pivot portion; the drive mechanism includes a first portion pivotally connected with the third pivot portion of the support frame and a second portion pivotally connected with the fourth pivot portion of the crossbeam and retractably mounted on the first portion.