| 摘要 |
A resilient external fixator between first and second bone portions includes a spring 11 of axis 12, a body 14, elements 15 for mounting the body to co-operate with the spring, a pin 16 fastened to the first bone and passing through the spring, a second body 22 including a base 122 and a projecting portion 44 that is secured to the base, one end 47 of the helical spring being mounted in co-operation about the projecting portion, and elements 24 for connecting the body with the bone portion O2 and the helical spring. The projecting portion presents a section that increases in continuous manner from its free end 48 until it reaches its end 46, the end 47 of the spring having an inside section that is greater than the section of the free end 48 and less than the cross-section of the end 46. |
| 主权项 |
1. A resilient external fixator between first and second bone portions (O1, O2), comprising:
a helical spring (11) defined along a first axis (12); a first body (14); first means (15) for mounting said first body (14) to co-operate with said helical spring (11); a first pin (16) suitable for being fastened to said first bone portion (O1), said first pin (16) being oblong in shape and defined along a second axis (17), said helical spring being suitable for turning relative to the first body about the first axis (12) and the first pin (16) passes through said helical spring (11); means (19) for mounting said first pin (16) to co-operate with said first body (14) so that said second axis (17) forms a non-zero angle with the first axis (12); a second body (22) comprising a base (122) and a projecting portion (44) having a first, free end (48) and a second (46), the base (122) being secured to the second end (46), one (47) of the ends of the helical spring (11) being mounted in co-operation around said projecting portion (44) with the first, free end (48) being located inside the one (47) end of the helical spring (11); and means (24) for connecting said second body (22) with said second bone portion (O2) and said helical spring (11), wherein, said projecting portion (44) presents an outermost cross-section that continuously increases from the first, free end (48) to the second end (46) that is secured to said base (122), said one (47) end of the helical spring having an inside cross-section that is greater than the outermost cross-section of the first, free end (48) of said projecting portion and less than the outermost cross-section of the second end (46) of said projecting portion that is secured to said base (122), said projecting portion (44) having a first outermost cross-section diameter at the first, free end (48) and a second outermost cross-section diameter at the second end (46) that is secured to said base (122), the first cross-section diameter being less than the second cross-section diameter. |
