Charles L. Bush, Jr.,Steven F. Krause,Spencer Popejoy,Abram Reitblat
申请号：
US16639362
公开号：
US20200245993A1
申请日:
2018.08.17
申请国别(地区):
US
年份:
2020
代理人:
摘要：
In one embodiment, an assembly includes a retractor (30, 730, 930) and at least one cylindrical rod (102, 402, 502, 702, 802, 902) attached to the retractor. The rod has a fixed length portion (108, 406, 508, 708, 808, 908) and a spring portion (104, 404, 504, 718, 832, 905). The spring portion of the rod has a longitudinal dimension that changes as a function of loading on the rod. When the rod is in contact with a solid surface such as a bone, it maintains contact with such surface even while changing shape due to loading on the rod. When the assembly includes multiple rods attached to the retractor, both spring-based rods and other types of rods may be used in combination.
