초록 ▼

A knee walker includes a frame; a cushion; a front crossmember; two rear wheels; two front spindles and two front wheels each pivotally connected to one of the two front spindles. Positive steering is provided by a handlebar rotatably connected to the front end of the frame; a steering gear responsi

A knee walker includes a frame; a cushion; a front crossmember; two rear wheels; two front spindles and two front wheels each pivotally connected to one of the two front spindles. Positive steering is provided by a handlebar rotatably connected to the front end of the frame; a steering gear responsively engaged with the rotatably connected handlebar shaft; a steering arm actuated by the steering gear responsive to the handlebar; a steering rod connecting the steering arm and one of the two front spindles, so as to pivot one associated front wheel responsive to the steering arm; and a tie rod linking the two front spindles responsively to the steering rod.

대표청구항 ▼

That which is claimed: 1. A knee walker comprising: a frame having two spaced apart and generally parallel members, a front end and a rear end spaced apart therefrom; a cushion supported on an upper side of said frame; a front crossmember supported on a lower side of the front end of said frame and

That which is claimed: 1. A knee walker comprising: a frame having two spaced apart and generally parallel members, a front end and a rear end spaced apart therefrom; a cushion supported on an upper side of said frame; a front crossmember supported on a lower side of the front end of said frame and extending laterally outwardly therefrom; two rear wheels, each rotatably connected adjacent the rear end of said frame; two front spindles, each positioned at an end of said front crossmember and approximately perpendicular thereto; two front wheels each pivotally connected to one of said two front spindles, said two front wheels farther spaced apart than said two rear wheels; a handlebar borne at an upper end of a height adjustable shaft rotatably connected at the front end of said frame; a steering gear supported at the front end of said frame and responsively engaged with said rotatably connected handlebar shaft; a steering arm actuated by said steering gear responsive to said handlebar; a steering rod connecting said steering arm and one of said two front spindles, so as to pivot a first front wheel responsive to said steering arm; and a tie rod linking said two front spindles responsively to said steering rod so as to pivot a second front wheel responsive to said steering arm. 2. The knee walker of claim 1, wherein said spaced apart and generally parallel members are tubular. 3. The knee walker of claim 1, wherein said steering gear comprises ball bearings. 4. The knee walker of claim 1, further comprising a friction brake positioned to stop at least one of said two rear wheels, said brake actuated by a cable operably connected to a loop handle supported on said handlebar. 5. The knee walker of claim 1, further comprising a friction brake having a manually actuated loop handle which surrounds the user's hand so as to prevent the hand from slipping off the brake handle. 6. The knee walker of claim 1, further comprising at least one mechanical member positioned to physically lock at least one wheel as a parking brake. 7. The knee walker of claim 1, wherein the handlebar shaft further comprises a folding joint so that said shaft may be folded thereabout. 8. The knee walker of claim 1, wherein said cushion is supported on a height adjustable post connected to said frame. 9. The knee walker of claim 1, wherein said handlebar is generally T-shaped and has ends that are offset toward the rear end of said frame. 10. The knee walker of claim 1, wherein said front wheels are spaced apart at least twice the distance between said rear wheels. 11. A knee walker comprising: a frame having two spaced apart and generally parallel members, a front end and a rear end spaced apart therefrom; a front crossmember on the front end of said frame; two rear wheels rotatably borne at the rear end of said frame; two front spindles, each positioned at an end of said front crossmember; two front wheels each pivotally connected to one of said two front spindles; a handlebar having a shaft rotatably connected at the front end of said frame; a steering arm actuated by turning of the handlebar shaft; a first member linking said steering arm and a first of said two front spindles, thereby pivoting the front wheel connected thereto; and a second member linking the first front spindle with the second front spindle. 12. The knee walker of claim 11, wherein said frame comprises two tubular members. 13. The knee walker of claim 11, further comprising a steering gear engaged with the handlebar shaft and responsive thereto. 14. The knee walker of claim 11, further comprising a friction brake positioned to stop at least one of said two rear wheels, said brake actuated by a cable operably connected to a loop handle supported on said handlebar. 15. The knee walker of claim 11, further comprising a friction brake having a manually actuated loop handle which surrounds the user's hand so as to prevent the hand from slipping off the brake handle. 16. The knee walker of claim 11, further comprising at least one mechanical member positioned to physically lock at least one wheel as a parking brake. 17. The knee walker of claim 11, wherein the handlebar shaft further comprises a folding joint so that said shaft may be folded thereabout. 18. The knee walker of claim 11, wherein said cushion is supported on a height adjustable post connected to said frame. 19. The knee walker of claim 11, wherein said handlebar is generally T-shaped and has ends that are offset toward the rear end of said frame. 20. The knee walker of claim 11, wherein said front wheels are spaced apart at least twice the distance between said rear wheels. 21. A knee walker comprising: a frame having two spaced apart and generally parallel members, a front end and a spaced apart rear end; at least one rear wheel rotatably connected at the rear end of said frame; a front crossmember at the front end of said frame; first and second front spindles, each positioned at an end of said front crossmember; two front wheels each pivotally connected to one of said first and second front spindles; a handlebar having a shaft rotatably connected at the front end of said frame; a steering gear engaged with said rotatable shaft; a steering arm actuated by said steering gear; a first steering link operably connecting said steering arm to the first spindle, to thereby turn a first front wheel; and a second steering link operably connecting the first front spindle with the second front spindle. 22. The knee walker of claim 21, wherein said frame comprises two tubular members. 23. The knee walker of claim 21, wherein said steering gear comprises ball bearings. 24. The knee walker of claim 21, further comprising a friction brake positioned to stop at least one of said two rear wheels, said brake actuated by a cable operably connected to a loop handle supported on said handlebar. 25. The knee walker of claim 21, further comprising a friction brake having a manually actuated loop handle which surrounds the user's hand so as to prevent the hand from slipping off the brake handle. 26. The knee walker of claim 21, further comprising at least one mechanical member positioned to physically lock at least one wheel as a parking brake. 27. The knee walker of claim 21, wherein the handlebar shaft further comprises a folding joint so that said shaft may be folded thereabout. 28. The knee walker of claim 21, wherein said cushion is supported on a height adjustable post connected to said frame. 29. The knee walker of claim 21, wherein said handlebar is generally T-shaped and has ends that are offset toward the rear end of said frame. 30. The knee walker of claim 21, wherein said front wheels are spaced apart at least twice the distance between said rear wheels.