초록 ▼

The present invention is a portable chair with caster wheels that is lightweight in construction and easily collapsed, carried, stored and transported by public or private means. The chair can be configured as an assistive mobility device to fill the unmet needs of aging healthy adults who wish to r

The present invention is a portable chair with caster wheels that is lightweight in construction and easily collapsed, carried, stored and transported by public or private means. The chair can be configured as an assistive mobility device to fill the unmet needs of aging healthy adults who wish to retain their independence and social interactions. It can also be configured as a collapsible office chair to meet the needs of employers with temporary working staff and for use by college students in crowded dorm rooms. Additional features such as an armrest, a foot rest, or a reclining back are easily added during manufacture and because of the chairs uncomplicated design and duplicity of parts, it is very economical to manufacture.

대표청구항 ▼

1. 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

1. 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. 2. The invention of claim 1 including adjustable backrest means for a backrest support. 3. The invention of claim 2 wherein said adjustable backrest support comprises telescoping sections inserted above the point of crossed intersection into the upper portion of the back side members on each of the side crossed members that connect to the upper rear corner brackets, and means for locking said telescoping sections in selectable positions in order to provide for selectable backrest adjustment. 4. The invention of claim 1 wherein the frame includes a seat and backrest means attached to the frame for supporting a person in a sitting position. 5. The invention of claim 1 wherein the frame includes a footrest means. 6. The invention of claim 1 wherein the frame includes an armrest means attached to the frame to support a person's arms while seated. 7. A four-sided collapsible chair frame assembly on wheels comprising:i. four frame sides each comprising two pivotally connected intersecting support members per side;ii. said frame assembly including a front side, a left side, a right side, and a back side,iii. said frame assembly including four upper brackets and four lower brackets;iv. one end of each support member is connected to a lower bracket and another end of each support member is connected to an upper bracket, wherein the lower end of each support member is connected to a lower bracket that also connects a lower end of the adjacent support member and an uppe r end of each support member is connected to an upper bracket that also connects an upper end of the adjacent support member,v. one caster wheel mounted below and attached to each of the lower brackets on the front or back side of the framevi. two telescoping anti-torque posts, each attached to a lower front bracket and each extending vertically from the its front lower corner brackets slideably passing through an upper front bracket in vertical alignment,vii. means mounted on the upper end of each telescoping anti-torque post to prevent the front brackets from sliding over the upper ends of the telescoping anti-torque posts and for initiation of the telescoping action within the anti-torque posts required during opening and closing,viii. two backrest support posts, each extending vertically from a lower back side corner bracket and sliding through a vertically aligned upper back corner bracket; whereby a collapsible four-sided wheeled chair frame is formed. 8. The invention of claim 7 wherein at least the two front side caster wheels or the two back side caster wheels have a means for locking the caster wheels in a stationary position. 9. The invention of claim 7 wherein the frame includes a seat and backrest means attached to the frame for supporting a person. 10. The invention of claim 7 wherein the frame includes a footrest means attached to the frame to support a persons feet. 11. The invention of claim 7 wherein the frame includes an armrest means attached to the frame to support a persons arms while seated. 12. The invention of claim 7 wherein the frame includes a means connected to said backrest support posts 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. 13. A collapsible chair suitable for moving a person from one location to another location comprising:A. a four-sided frame, collapsible from front to back and side to side, said frame having front, back and sides; said frame including:a. a front side comprising a pair of front crossed support arms;b. a back side comprising a pair of back side crossed support arms;c. a left side comprising a pair of left side crossed support arms,d. a right side comprising a pair of right side crossed support armse. each pair of said crossed support arms pivotally connected where they intersect and being of approximately equal length;f. wherein each crossed support arms has a lower end and an upper end; andg. wherein a lower end of one of the front crossed support arms and a lower end of the adjacent left side crossed support arm are connected to a left lower front corner bracket adjacent thereto; andh. wherein the lower end of another front crossed support arms and a lower end of the adjacent right side crossed support arm are connected to a right lower front corner bracket adjacent thereto; andi. wherein a lower end of one of the back crossed support arms and an adjacent lower backside end of a left side crossed support arm are connected to a lower left back corner bracket adjacent such respective ends, andj. wherein a lower right end of another back crossed support arm and an adjacent lower backside end of a right side crossed support arm are connected to a right lower back corner bracket adjacent such respective ends, andk. wherein an upper left end of a back crossed support arm and the upper left back end of a side crossed support arm are connected to an upper left back corner bracket adjacent such respective ends; andl. wherein an upper right ends of a back crossed support arm and an upper right back end of a side crossed support arm are connected to an upper right back corner bracket adjacent such respective ends; andm. wherein an upper left end of a front crossed support arm and an upper left front end of an adjacent left side crossed support arm are connected to an upper left front corner bracket adjacent such respective ends,n. wherein an upper right end of a front crossed support arm and an upper right front end of an adjacent right side crossed support arm are connected to an upper right front corner bracket adjacent such respective ends.B. said chair 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 the first post is connected to left lower rear corner bracket and another backrest support post is connected to a right lower rear corner bracket; each of said backrest support posts slidably passing through an upper back corner bracket in vertical alignment with said backrest support post; said backrest support posts having the strength required to permit lifting the front or back of the chair off the ground in order to change elevation or avoid obstructions to movement,C. said chair further comprising right and left telescoping anti-torque posts, each having an upper section and a lower section, with one section slidably telescoping within the other; and wherein the right post is supported by said right front corner bracket and the left post is supported by said left front corner bracket; said posts being maintained in vertical alignment by said brackets, and each of said posts slidably passing through an upper corner bracket in vertical alignment with said post;D. means mounted on the upper end of each telescoping anti-torque post to prevent the front upper corner brackets from sliding over the upper ends of the telescoping anti-torque posts and for initiation of each anti-torque post's telescoping action,E. two caster wheels with freedom to rotate 360 degrees in the horizontal plane monuned below and attached to the lower brackets on the front or back side of the frame and two caster wheels with no freedom of rotation in the horizontal plane mounted below and attached to the lower brackets on the frame side opposite the freely rotating caster wheels,F. said caster wheels having locking brakes mounted on the rear wheels or mounted on the front wheels;G. means connected to said rear backrest support posts for pushing or pulling the chair while occupied, and including the ability to lift or tilt the rear wheels or 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,H. a footrest;I. means for holding the frame in its open position. 14. A collapsible chair as claimed in claim 13, including a seat and backrest. 15. A seat and backrest as claimed in claim 14 wherein the seat and backrest are made of a flexible material. 16. A collapsible chair as claimed in claim 13 wherein said footrest is adjustable in both the horizontal and the vertical planes. 17. A collapsible chair as claimed in claim 16 wherein the footrest comprises a forward telescoping frame member and is collapsible or detachable. 18. A collapsible chair as claimed in claim 13 wherein hand grips are placed on the upper ends of telescoping anti-torque posts to assist the chair occupant to stand or sit. 19. A mobility collapsible chair as claimed in claim 18 wherein flexible arm rests are attached to the hand grips on the upper end of the anti-torque posts and to the backrest posts. 20. The chair as recited in claim 13, wherein the position of the backrest is adjustable. 21. The collapsible chair as recited in claim 20, including telescoping means for backrest adjustment. 22. The invention in claim 13 wherein the means for moving the chair is a push bar connected by means of a quick release fitting to the upper ends of the backrest support posts, said fittings, posts, and push bar having the strength and rigidity required to permit lifting the rea r 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. 23. The invention in claim 13 wherein the means for pushing or pulling the chair while occupied is a pair of collapsible handles having the strength and rigidity required to permit 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. 24. A folding chair comprising:a. frame comprised of a pair of front crossed support arm; a pair of back crossed support arms; and two pairs of side crossed support arms; each pair of crossed support arms pivotally connected together where they cross;b. a lower end of each of the front crossed support arms and an adjacent lower front end of a side crossed support arm pivotally connected to first and second lower, front corner brackets;c. a lower end of each of the back crossed support arms and a lower, back end of an adjacent side support arm pivotally connected to first and second lower, back corner brackets;d. an upper end of each of the back cross support arms and an adjacent upper back end of a side cross support arm pivotally connected to first and second upper, back corner brackets;e. an upper end of each of the front crossed side support arms and an adjacent upper front end of a side cross support arm pivotally connected to first and second upper, front corner brackets;f. a pair of rear backrest support posts, each having an upper end and a bottom end, a bottom of each post being connected to the lower rear bracket in vertical alignment with said post; each of said posts slidably passing through the upper bracket in vertical alignment with said post;g. adjustable backrest means comprising telescoping sections inserted above the point of crossed intersection into the upper portion of the rear side support arms on each of the side crossed support arms that connect to the upper rear corner brackets, and means for locking said telescoping sections in selectable positions in order to provide for selectable backrest adjustment. 25. A multiple sided collapsible chair frame assembly on wheels comprising:i. at least four frame sides each comprising two pivotally connected intersecting support members per side;ii. said frame assembly including upper brackets equal to the number of sides and lower brackets equal to the number of sides;iii. said frame assembly including at least a front side and a back side,iv. one end of each support member connected to a lower bracket and another end of each support member is connected to an upper bracket, wherein the lower end of each support member is connected to a lower bracket that also connects the lower end of the adjacent support member and the upper end of each support member is connected to an upper bracket that also connects the upper end of the adjacent support member, whereby a multiple sided collapsible connected frame is formed,v. a caster wheel mounted below and attached to each lower corner bracketvi. telescoping anti-torque posts mounted on each lower front bracket, said telescoping anti-torque posts extending vertically from lower brackets to or through a vertically aligned upper bracket,vii. 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,viii. a means connected to said b ackrest support posts and 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, whereby a collapsible wheeled frame is formed. 26. The invention of claim 25 including means attached to the upper ends of telescoping anti-torque posts to prevent the upper front brackets from sliding past the upper ends of the telescoping anti-torque post and for initiation of telescoping separation action.