A wheelchair comprises a frame and first and second rear wheels that are each independently mounted to the frame via a respective mounting hub. Each rear wheel is detachably mounted to its respective mounting hub at two or more distinct hub mounting points. Either or both of the hub mounting points
A wheelchair comprises a frame and first and second rear wheels that are each independently mounted to the frame via a respective mounting hub. Each rear wheel is detachably mounted to its respective mounting hub at two or more distinct hub mounting points. Either or both of the hub mounting points can be movable with respect to a remainder of the hub, for example via a pivoting arrangement. A disk can be positioned at the rear wheel and a stop element located at the mounting hub can be selectively operated to interfere with the disk to prevent rotation of that rear wheel. The frame can comprise first and second spaced apart and unitary tubes which each extending in an unbroken manner from a wheelchair seat to a wheelchair forward region.
대표청구항▼
1. A wheelchair comprising: a frame;first and second rear wheels that are each independently mounted to the frame;a first mounting hub comprising a fixed portion, fixedly mounted to the frame, and a pivotable portion, that is pivotably attached to said first mounting hub fixed portion; anda second m
1. A wheelchair comprising: a frame;first and second rear wheels that are each independently mounted to the frame;a first mounting hub comprising a fixed portion, fixedly mounted to the frame, and a pivotable portion, that is pivotably attached to said first mounting hub fixed portion; anda second mounting hub comprising a fixed portion, fixedly mounted to the frame, and a pivotable portion, that is pivotably attached to said second mounting hub fixed portion,the first rear wheel being independently mounted to the frame via said first mounting hub at a hub mounting point located in said first mounting hub pivotable portion, and the second rear wheel being independently mounted to the frame via said second mounting hub at a hub mounting point located in said second mounting hub pivotable portion,wherein a first shock absorber is positioned and mounted between the first mounting hub fixed and pivotable portions and a second shock absorber is positioned and mounted between the second mounting hub fixed and pivotable portions, and wherein the respective mounting hub pivotable portions are pivotally mounted to an in-use proximal region of the respective mounting hub fixed portions, with the shock absorbers being located for operation at a location that is remote from the respective proximal regions. 2. A wheelchair as claimed in claim 1 wherein the frame comprises first and second spaced apart unitary tubes which each extend in an unbroken manner from a wheelchair seat to a forward region of the wheelchair. 3. A wheelchair as claimed in claim 2 wherein first and second backrest members are respectively mounted to proximal ends of each of the first and second tubes, and a respective rear wheel mounting hub is fastened to each of the first and second tubes adjacent to their proximal ends. 4. A wheelchair as claimed in claim 3 wherein each backrest member is pivotally connected to the frame via a respective mounting hub via a bracket to enable adjustment of the backrest members with respect to the frame, with each bracket being fastened to a respective side of the backrest member and extending therefrom to a remote end which is adapted for mounting to the mounting hub via a pivot pin arrangement. 5. A wheelchair as claimed in claim 4 wherein each bracket comprises a slot formation therein whereby, when the bracket is mounted to the mounting hub, the slot formation can be aligned to receive therein a securing pin that projects laterally out from a proximal end of the frame whereby the extent of backrest member pivoting can be limited, with each securing pin being spring-loaded to an extended position in which it extends through the slot formation to restrict the bracket and thus the backrest member against pivoting, but wherein each securing pin can be moved against the spring and into a retracted position wherein it is released from the slot formation to free the backrest member for pivoting. 6. A wheelchair as claimed in claim 5 wherein, in use, the first and second backrest members extend generally upwards with respect to a first cross-bracing member that is located at the frame proximal end, with the securing pins extending from respective opposite ends of the first cross-bracing member, and wherein the wheelchair seat is in use connected to extend forwardly from the first cross-bracing member. 7. A wheelchair as claimed in claim 6 wherein the wheelchair seat comprises a detachable insert, the removal of which enables the wheelchair seat to function in shower and commode modes. 8. A wheelchair as claimed in claim 2 wherein, in use, each of the first and second tubes has, at the forward region, a first generally downwardly sloped portion to which a respective front wheel can be mounted, with the first portion curving back to a second generally more gradually sloped portion to which a respective side of the seat together with a respective rear wheel can be mounted. 9. A wheelchair as claimed in claim 8 wherein the first and second tubes are interconnected by at least two spaced cross-bracing members, with a first cross-bracing member being located to extend between proximal ends of each tube, and with a second cross-bracing member extending between the tubes at a location that is spaced from the first cross-bracing member. 10. A wheelchair as claimed in claim 9 comprising three spaced cross-bracing members that are defined by: the first cross-bracing member located at the proximal ends of each tube;the second cross-bracing member which is located intermediate the proximal ends of each tube and distal ends of each tubes; anda third cross-bracing member located at the distal ends of each tube; and wherein a footrest can be mounted at the third cross-bracing member. 11. A wheelchair as claimed in claim 1 wherein each hub mounting point, at which each rear wheel is detachably mounted to its respective mounting hub pivotable portion, is selected from two or more distinct hub mounting points for each respective rear wheel whereby, in use of the wheelchair, at least one of the hub mounting points is positioned in the mounting hub pivotable portion at a location lower than another of the hub mounting points to enable a mounting location of each rear wheel to be changed, wherein the in use height of the wheelchair frame can be altered. 12. A wheelchair as claimed in claim 11 wherein, in use of the wheelchair, at least one of the hub mounting points is adjustable in the mounting hub pivotable portion forwards and backwards with respect to the frame to enable a rear wheel centreline to be correspondingly altered with respect to the frame. 13. A wheelchair as claimed in claim 12 wherein the hub mounting point that is adjustable is a bush adapted to be moved along an elongate sleeve formation, with the bush being removable from the sleeve and repositionable therein at a new location along the sleeve. 14. A wheelchair as claimed in claim 1 further comprising a disk positionable for operation between at least one of the rear wheels and the mounting hub at which the rear wheel can be mounted to the frame of the wheelchair, the disk being located such that a stop element located at the mounting hub can be selectively operated to interfere with the disk to prevent rotation of the rear wheel. 15. A wheelchair as claimed in claim 14 wherein the disk is fixedly mounted with respect to the rear wheel, and wherein the stop element is a braking pin located at the wheel mounting hub and is selectively extendable from the wheel mounting hub whereby, in an extended position, the braking pin interferes with the disk to prevent rear wheel rotation. 16. A wheelchair as claimed in claim 15 wherein the disk further comprises a plurality of slots, wherein the braking pin is spring-loaded into the extended position whereby it extends through one of the slots to positively prevent the rear wheel rotation, but can be displaced into and retained at a retracted position whereby it is withdrawn from the slot. 17. A wheelchair as claimed in claim 1 wherein an inclination of rear wheel mounting at a respective mounting point can be changed such that rear wheel camber can be altered, with the inclination of the respective hub mounting point being changed by interchanging a bush of the respective hub mounting point with a bush that has an internal bore having a different inclination.
Ellis Laura (230 A. W. Guadalupe LaGrange TX 78945) Caram Joe M. (3106 Aberdeen Houston TX 77025) Cantu John R. (502 McDougal San Antonio TX 78223) Dudley Troy W. (P.O. Box 6 Haslet TX 76052) Callaha, Wheelchair shock absorbing apparatus.
Haury Gilbert E. (Grafton OH) Patel Nathalal G. (Elyria OH) Lockard Walter G. (Elyria OH) Wiatrak Thomas R. (Brunswick OH) Curran Neal J. (Fairview Park OH), Wheelchair with adjustable rear canes.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.