Device for converting a rotary motion into an oscillating motion
View Patent ↗A device for converting a rotational movement into a rotatively oscillating movement is described comprising a drive shaft, a second, rotatively oscillating shaft, a driving mechanism, a housing, and a gearing mechanism comprising a movable lever. A sawing device is also described.
1. A device for treating a body site, comprising:
a drive shaft having a longitudinal axis, a rear end associable with a drive unit, a front end, a central borehole, and a pivot at the front end eccentrically disposed with respect to the longitudinal axis of the drive shaft and having a central axis parallel to and offset from the longitudinal axis of the drive shaft;
an oscillating shaft having a longitudinal axis, a central borehole, a front end associable with a surgical tool or instrument, and a rear end;
a mechanism disposed between the front end of the drive shaft and the rear end of the oscillating shaft, for converting a rotational movement of the drive shaft into an oscillating rotational movement of the oscillating shaft concentric with the longitudinal axis of the oscillating shaft; and
a guide wire configured to extend through the central boreholes of the drive shaft and the oscillating shaft,
wherein the longitudinal axes of the drive shaft and the oscillating shaft are substantially coaxial.
2. The device of claim 1 , wherein the mechanism comprises a movable lever substantially transverse to the longitudinal axis of the drive shaft.
3. The device of claim 2 , wherein the movable lever is fixedly connected to the pivot.
4. The device of claim 1 , wherein at least a portion of both the drive shaft and the oscillating shaft are disposed in a housing.
5. The device of claim 1 , wherein the surgical tool or instrument is detachably fastened to the oscillating shaft.
6. The device of claim 1 , wherein the surgical tool or instrument has an axis substantially parallel to the longitudinal axis of the drive shaft.
7. The device of claim 1 , wherein the mechanism causes the oscillating shaft to oscillate at an angle between about 0.05° and about 10°.
8. A device for positioning and operating a surgical tool or instrument, comprising:
a drive shaft having a longitudinal axis, a front end, a central borehole, and a pivot eccentrically disposed relative to the longitudinal axis of the drive shaft, the pivot having a central axis parallel to and offset from the longitudinal axis of the drive shaft;
an oscillating shaft having a longitudinal axis, a central borehole, a front end associable with a surgical tool or instrument, and a rear end;
a movable lever substantially transverse to the longitudinal axis of the drive shaft and connected to the pivot; and
a guide wire configured to extend through the central boreholes of the drive shaft and the oscillating shaft;
wherein the oscillating shaft is connected to a catch, and wherein the movable lever engages the catch to rotationally oscillate the oscillating shaft concentric with the longitudinal axis of the oscillating shaft;
wherein the device is configured to be lowered over the guide wire to position the device in relation to a body site;
wherein the longitudinal axes of the drive shaft and oscillating shaft are substantially coaxial.
9. The device of claim 8 , wherein the surgical tool or instrument has an axis substantially parallel to the longitudinal axis of the drive shaft.
10. The device of claim 8 , wherein the surgical tool or instrument is detachably fastened to the oscillating shaft.
11. The device of claim 8 , wherein the movable lever comprises a recess for receiving at least a portion of the pivot.
12. The device of claim 8 , wherein at least a portion of both the drive shaft and the oscillating shaft are disposed in a housing.
13. A device for treating a body site, comprising:
a drive shaft having a longitudinal axis, a rear end associable with a drive unit, a front end, and a pivot eccentrically disposed relative to the longitudinal axis of the drive shaft, the pivot being located at the front end of the drive shaft and having a central axis parallel to and offset from the longitudinal axis of the drive shaft;
an oscillating shaft having a longitudinal axis, a front end associable with a surgical tool or instrument, and a rear end;
a mechanism disposed between the front end of the drive shaft and the rear end of the oscillating shaft, for converting a rotational movement of the drive shaft into an oscillating rotational movement of the oscillating shaft concentric with the longitudinal axis of the oscillating shaft; and
a guide element substantially parallel to the longitudinal axis of the drive shaft,
wherein the longitudinal axes of the drive shaft and the oscillating shaft are substantially coaxial.
14. The device of claim 13 , wherein the drive shaft and the oscillating shaft each further comprise a central borehole, and wherein the guide element extends through the central boreholes.
15. The device of claim 13 , wherein the guide element comprises a guide wire.