Patent ID: 6789809
Filing Date: 2004-09-14
Classification: B62B,Y10T

Abstract:
A push cart transferable to a back holder and a chair comprises:a bottom frame having two adjoining ends disposed with transverse through holes; two connecting mounts of a longitudinal through hole, the transverse through hole and a concave slot are disposed on a main body thereof; an adjoining end of the bottom frame is received inside the concave slot. a shaft rod penetrates into the transverse through hole of the connecting mount and the transverse through holes of the adjoining ends to allow the bottom frame to rotate by using the shaft rod as a turning shaft; upper retaining convex portions and lower retaining convex portions are respectively disposed on lower segments of two left and right lateral tubes of a back frame; the left and right lateral tubes located between the upper and the lower retaining convex portions are movably connected into the longitudinal through holes of the connecting mounts; a pair of turning wheels are movably connected at the lower segments of the left and right lateral tubes; on lower segments of two left and right lateral tubes of an upper frame are positioned slightly above the upper aspects of the left and right lateral tubes of the back frame respectively through an angle adjusting device, wherein a turning shaft is disposed between the pair of turning wheels to penetrate into a transverse through hole of a brake device thereby freely rotating therein; the brake device is clamped fixedly by a clamp slot of the main body thereof at the lower end of the left and right tubes of the back frame; an outer lateral wall of the brake device is disposed with a convex rod which penetrates transversely into the clamp slot and further fixedly connects with the left and right lateral tubes of the back frame; a rocker arm has a front end disposed with a concave portion and a rear end movably connected at a lower aspect of the bottom frame through a shaft portion to allow the rocker arm to rotate by using the shaft portion as a turning shaft thereby making the concave portion to selectively retain on to the convex rod.