Rasp

摘要

A rasp for shaping a bone is provided. The rasp includes a housing, a driving mechanism, a first gear assembly, two linkage units and two blades. The housing has a channel along a first axis. The driving mechanism has an output gear rotating about the first axis. The first gear assembly rotates about a second axis and is driven by the output gear. The first gear assembly has a first and a second rotation surfaces. A first and a second connection points are respectively located on the first and the second rotation surfaces. The linkage units slidably pass through the channel. The first end of each of the linkage units is pivotally connected to the corresponding connection point, such that the second ends move along the first axis in a reciprocating manner. The blades are respectively and detachably connected to the second ends.

主权项

1. A rasp for shaping a bone for receiving a prosthesis, the rasp comprising:
a housing having a channel orientated along a first axis; a driving mechanism having an output gear rotating about the first axis; a first gear assembly rotatably disposed in the housing to rotate about a second axis and driven by the output gear, the first gear assembly having a first rotation surface and a second rotation surface opposite to each other and a first connection point and a second connection point respectively located on the first and second rotation surfaces; two linkage units slidably passing through the channel, each of the linkage units having a first end and a second end, wherein the first end of each of the linkage units is pivotally connected to a corresponding one of the first and second connection points, such that the second ends are driven by the first gear assembly to move along the first axis in a reciprocating manner; and two blades respectively and detachably connected to the second ends.