Patent ID: 6776433
Filing Date: 2004-08-17
Classification: A47C,A61G,B62B

Abstract:
A collapsible chair frame assembly on wheels comprising:i. four frame sides, a front side, a left side, a right side and a back side, each side comprising two pivotally connected intersecting support members per side: ii. said frame assembly including a number of upper corner brackets and a number of lower corner brackets, wherein the number of upper corner brackets is equal to the number of sides and the number of lower corner brackets is equal to the number of sides: iii. one end of each support member is connected to a lower corner bracket and another end of each support member is connected to an upper corner bracket, wherein a lower end of each support member is connected to a lower corner bracket that also connects a lower end of the adjacent support member and an upper end of each support member is connected to an upper corner bracket that also connects an upper end of the adjacent support member, iv. said frame further comprising a pair of rear backrest support posts, each backrest support post having an upper end and a bottom end, wherein a bottom end of one post is connected to a backside lower corner bracket and a bottom end of another post is connected to another backside lower corner bracket, each of said backrest support posts slidably passing through an upper backside corner bracket in vertical alignment with said backrest support post: said backrest support post having the mechanical strength required to permit lifting or tilting the front or back of the chair off the ground in order to change elevation or avoid obstructions to forward or backward movement, v. a means connected to said backrest support posts having the mechanical strength for pushing or pulling the chair while occupied, and for lifting the rear wheels off the ground or tilting the front wheels off the ground in order to change elevation or avoid obstructions to forward or backward movement, said means being either rapidly removable or collapsible with the upper ends of the backrest support posts, and a lock that locks the lifting means to the frame, vi. a caster wheel mounted below and attached to every lower corner bracket with at least two caster wheels with freedom to rotate 360 degrees in the horizontal plane, vii. telescoping anti-torque posts mounted on each lower front corner bracket, said telescoping anti-torque posts extending vertically from the lower brackets to or through a vertically aligned upper front corner bracket, whereby a collapsible wheeled chair frame assembly is formed.