Surgical sagittal saw with a drive assembly capable of displacing the attached blade in a crossed loop pattern

摘要

A saw for pivoting a blade in a sagittal plane. The saw includes a drive assembly with at least one drive member. The drive assembly is configured to both reciprocate the blade in the sagittal plane and to simultaneously pivot the blade around an axis that extends through the sagittal plane. The drive assembly is configured to reciprocate and pivot the blade at different frequencies. Consequently the teeth (186) of the blade travel in a loop pattern that crosses itself.

主权项

1. A surgical sagittal saw, said saw including:
a body; a motor disposed in said body, said motor having an output shaft that is rotated upon actuation of said motor; a blade mount attached to said body that is configured to releasably receive a surgical sagittal saw blade, the saw blade having a distal end with teeth; a drive assembly connected between said motor output shaft and the saw blade, said drive assembly including first and second actuating members that engage the saw blade, wherein:
said first actuating member is configured to undergo a motion that reciprocates the saw blade back and forth in a plane in which the blade is disposed;said second actuating member is configured to undergo a motion that pivots the saw blade back and forth around an axis that extends through the plane in which the saw blade is reciprocated; and said first and second actuating members are connected to said motor output shaft so that the rotation of said output shaft causes said actuating members to simultaneously reciprocate and pivot the saw blade such that the saw blade reciprocates at a first frequency and pivots at a second frequency that is different from the first frequency.