A portable folding wheelchair includes a front U-shaped tube and a rear U-shaped tube pivotally coupling with each other through a pin to form a X-shape. The front U-shaped tube has an upper end on two sides to fasten to a connection plate. The connection plate connects to a backrest. The front U-sh
A portable folding wheelchair includes a front U-shaped tube and a rear U-shaped tube pivotally coupling with each other through a pin to form a X-shape. The front U-shaped tube has an upper end on two sides to fasten to a connection plate. The connection plate connects to a backrest. The front U-shaped tube has a lower section on two sides to pivotally engage with an upright tube. The upright tube and the rear U-shaped tube have an upper end bridging a sleeve. The wheelchair has a simple structure and may be folded in forward, rearward, upward and downward directions to become a smaller size to facilitate carrying or storing in a car to enable disabled people to use in travels and trips.
대표청구항▼
1. A portable folding wheelchair comprising a seat frame and a backrest, wherein the seat frame includes a front U-shaped tube and a rear U-shaped tube coupling with each other in a middle section on two sides through a pin to form a X-shape from sideward, the front U-shaped tube and the rear U-shap
1. A portable folding wheelchair comprising a seat frame and a backrest, wherein the seat frame includes a front U-shaped tube and a rear U-shaped tube coupling with each other in a middle section on two sides through a pin to form a X-shape from sideward, the front U-shaped tube and the rear U-shaped tube having respectively an upward opening, the rear U-shaped tube having a lower end on two sides to couple with a rear wheel, the front U-shaped tube having an upper end on two sides to fasten to a connection plate, the connection plate connecting to the backrest, the front U-shaped tube having a lower section on two sides to pivotally engage with an upright tube, the upright tube having a lower end coupling with a front wheel, the upright tube and the rear U-shaped tube having an upper end bridging a sleeve, the sleeve having a front end forming a notch, the upright tube having an upper end pivotally engaging with the notch through a pin, the sleeve further having an opening formed on a lower section in the longitudinal direction to allow the sleeve to couple with the upper end of the rear U-shaped tube, the sleeve having two lateral sides on a middle section to form respectively a slot to couple with a bolt to engage with the rear U-shaped tube, the sleeve further having a flap extending outwards from an outer side on a rear section thereof, the rear U-shaped tube having a retaining pin corresponding to the flap, the upper ends of the two upright tubes being bridged by a front stretcher, the two connection plates being bridged by a rear stretcher, the front stretcher and the rear stretcher being coupled with a seat canvas.2. The portable folding wheelchair of claim 1, wherein the backrest includes a U-shaped handle tube which has an opening directing downwards, the U-shaped handle tube being coupled with a transverse backrest canvas, the U-shaped handle tube having two sides, each has a lower end pivotally engaging with the connection plate through a pin, the U-shaped handle tube further having an anchor pin located on a lower section on two sides, the anchor pin having a bigger head and screw threads formed on a rear section, the two anchor pins being coupled respectively with a spring and running through the U-shaped handle tube from an outer side of said handle tube to fasten to two ends of a rope, the connection plate having an anchor hole located above the pivotal connection point of the pin of the U-shaped handle tube, the head of the anchor pin being allowed to wedge in the anchor hole.3. The portable folding wheelchair of claim 1, wherein two sides of the U-shaped handle tube are fastened respectively to a U-shaped dock which has an opening directing forwards, the U-shaped dock having a lower section pivotally coupled with the U-shaped handle tube through a pin, the U-shaped dock having an outer side to anchor an armrest.4. The portable folding wheelchair of claim 1, wherein the front U-shaped tube has a lower section with inner sides pivotally coupling with a U-shaped foot pedal, the U-shaped foot pedal having an opening directing rearwards.5. The portable folding wheelchair of claim 1, wherein the seat canvas has a rear end attaching to a handle.
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이 특허에 인용된 특허 (5)
Harrison, Richard J.; Mann, William F., Assistive mobility device.
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