Patent ID: 7918473

Claim:
A wheelchair comprising: a main chassis on which at least one upholstery is provided, the main chassis comprising front fitting tubes and rear fitting tubes, two large wheels being rotatably mounted to two lateral sides of the main chassis; a front chassis arranged at a front side of the main chassis and comprising upper-side and lower-side front extension tubes telescopically and movably fit to the front fitting tubes of the main chassis so as to provide an adjustable relative position of the front chassis with respect to the main chassis to allow the relative position of the front chassis to change from a most-retracted position where the front chassis is substantially received in the main chassis to a most-extended position, and front wheels being rotatably mounted to the front chassis; a reclining back frame rotatably mounted to a rear side of the main chassis to provide an adjustable inclination of the reclining back frame, the reclining back frame forming at least one driving slot, which is in the form of an L-shape; a rear chassis arranged at a rear side of the main chassis and comprising upper-side and lower-side rear extension tubes telescopically and movably fit to the rear fitting tubes of the main chassis so as to provide an adjustable relative position of the rear chassis with respect to the main chassis to allow the relative position of the rear chassis to change from a most-retracted position where the rear chassis is substantially received in the main chassis to a most-extended position, the rear chassis comprising a driving bar that is movably received in and in driving engagement with the driving slot of the reclining back frame so that when the relative position of the rear chassis is adjusted with respect to the main chassis to the most-extended position, the inclination of the reclining back frame is adjusted correspondingly and set to a substantially horizontal condition, and rear wheels being rotatably mounted to the rear chassis; and guard boards, which are removably mounted to the lateral sides of the main chassis below armrests of the main chassis; wherein the relative positions of the front and rear chassis are changeable from the most-retracted position, where the front and rear chassis are substantially received in the main chassis to allow the wheelchair to operate as a wheelchair, to the most-extended position, where the reclining back frame is substantially horizontal to allow the wheelchair to be converted to a push-cot, in which the guard boards are re-positionable on the front chassis to support legs of a user lying on the push-cot.