Patent ID: 6428103
Filing Date: 2002-08-06
Classification: A61G,Y10S

Abstract:
A wheelchair comprising:a base with a pair of wheels connected to each side of the base; a seat pivotally connected to the base; a backrest pivotally connected to the seat; and a transmitting mechanism for pivoting the seat and the backrest, the transmitting mechanism comprising: a seat bracket securely mounted on one side of the seat; a seat shaft received in the seat bracket; a front gear and a rear gear respectively mounted on opposite ends of the seat shaft; a main shaft slidably received in the base and having one end extending into the seat bracket; a motor received in the base to rotate the main shaft; a back shaft securely connected to the backrest and having one end extended into the seat bracket; a back gear mounted on one end of the back shaft and engaging with the rear gear; a seat gear mounted on one end of the main shaft and engaging with the front gear in addition to being detachably connected to the seat bracket; and a main gear mounted on the main shaft and engaging with the front gear; wherein the main gear and the seat gear are alternately engaged with the front gear.