Multi-directional handpiece

Patent metadata

Field	Value
Publication number	US-9833299-B2
Application number	US-201414566668-A
Country	US
Kind code	B2
Filing date	Dec 10, 2014
Priority date	Dec 10, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A multi-directional handpiece that includes a motor drive extending along and configured for rotation about a body axis, the motor drive having: a motor gearing at a proximal end of the motor drive; and a file gearing in engagement with the motor gearing for transferring the rotational and axial movement to a workpiece; and a housing for the workpiece; and wherein through rotation of the motor drive, the workpiece moves in an axial oscillating motion while being rotated.

First claim

The invention claimed is:

1. A multi-directional handpiece comprising:
a motor drive extending along and configured for rotation about a body axis, the motor drive having:
a motor gearing at a proximal end of the motor drive; and
a rotatable cam drive at the proximal end of the motor drive, the rotatable cam drive extending along an offset axis and being generally parallel to the body axis; and
a cam follower extending along a head axis; the cam follower having:
a groove having opposing spaced apart walls for receiving the cam drive;
a file gearing in engagement with the motor gearing for transferring the rotational movement of the motor drive about the body axis to the cam follower about the head axis; and
a housing for a workpiece; and
wherein through rotation of the motor drive, the rotatable cam drive rotates about the offset axis while revolving around the body axis thereby moving the cam follower generally along the head axis so that the workpiece moves in an oscillating motion while being rotated.

2. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated from 1 to 20 times for every revolution.

3. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated from 1 to 10 times for every revolution.

4. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated at least 1 time for every revolution.

5. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated at least 2 times for every revolution.

6. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated less than 10 times for every revolution.

7. The multi-directional handpiece of claim 1 , wherein the workpiece is axially oscillated less than 7 times for every revolution.

8. The multi-directional handpiece of claim 1 , wherein the workpiece is rotated either clockwise, counterclockwise or in reciprocation.

9. The multi-directional handpiece of claim 1 , wherein the workpiece is a file.

Assignees

• Dentsply Int Inc

Inventors

• Shotton Vincent
• Ammon Dan
• Karazivan Naim

Classifications

• A61C1/02

  characterised by the drive of the dental tools · CPC title

• A61C1/07

  with vibratory drive, e.g. ultrasonic waves · CPC title

• A61C1/185

  Drives or transmissions · CPC title

• A61C1/12

  Angle hand-pieces · CPC title

• A61C1/148 Primary

  Non-rotating tool holders, e.g. vibrating, oscillating, nutating · CPC title