| 摘要 |
A tubular crutch including a tubular crutch body, a cantilever handle and a ground engaging extension is described. The cantilever handle includes a curved base plate, a plurality of bolts, a tubular member, a plurality of locking nuts, a key, and a contoured component. The tubular crutch also includes a ground engaging extension with a spring loaded button that is received at the bottom of the tubular elongated member. The tubular crutch body includes a tubular posterior stabilizing element, a first concave curve adjacent to the posterior stabilizing element, a second convex curve proximate to the first concave curve, a third concave curve proximate to the second convex curve and a tubular elongated portion adjacent to the third concave curve. |
| 主权项 |
1. A tubular crutch comprising:
a tubular crutch body that includes,
a tubular posterior stabilizing element having a tubular posterior stabilizing element center line,a first concave curve adjacent to the posterior stabilizing element, wherein the first concave curve has a first angle of approximately 75°-85°,a second convex curve proximate to the first concave curve, wherein the second convex curve has a second angle of approximately 152°-162°,a third concave curve proximate to the second convex curve, wherein the third concave curve has a third angle of approximately 56.5°-66.5°,the first concave curve, the second convex curve, the third concave curve in a first plane,a tubular elongated portion adjacent to the third concave curve, the tubular elongated portion having a first plurality of paired orifices in the first plane and a second plurality of orifices at a second plane at a bottom of the tubular elongated portion,the tubular elongated portion having a tubular elongated portion center line that is 10°-20° from the tubular posterior stabilizing element center line; and a cantilever handle that includes,
a curved base plate that interfaces with the tubular elongated portion of the tubular crutch body, wherein the curved base plate includes two base plate orifices,a tubular member;a first bolt having a threaded end and a head end wherein the first bolt is welded to one of the base plate orifices of the curved base plate and the tubular member is welded to the curved base plate and extending downward at an angle from the curved base plate so that the tubular member surrounds the head end of the first bolt,a second bolt having a threaded end and a head end, wherein the second bolt is also welded to another one of the base plate orifices of the curved base plate,the threaded end of each bolt passing through a pair of the first paired orifices in the first plane along the tubular elongated portion of the tubular crutch body, andat least two locking nuts, wherein each nut has an inner threaded surface that receives the threaded end of each bolt to secure the handle to the tubular crutch body. |
