Multi-directional handpiece

Patent metadata

Field	Value
Publication number	US-10350028-B2
Application number	US-201715801357-A
Country	US
Kind code	B2
Filing date	Nov 2, 2017
Priority date	Dec 10, 2013
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

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 first motor drive and a second motor drive, both extending along and configured for rotation about a body axis;
a motor gearing at a proximal end of the first and second motor drives;
a cam drive at the proximal end of the first and second motor drives, the cam drive extending along an offset axis and being generally parallel to the body axis;
a cam follower extending along a head axis; the cam follower having:
a groove having opposing spaced apart walls for receiving the cam drive; and
a file gearing in engagement with the motor gearing for transferring the rotational movement of the first motor drive about the body axis to the cam follower about the head axis;

a housing for a workpiece, and
a drive pin in communication with the cam drive,
wherein through rotation of the second motor drive, the 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 Sirona Inc

Inventors

• Shotton Vincent
• Ammon Dan
• Karazivan Naim

Classifications

• A61C5/42

  Files for root canals; Handgrips or guiding means therefor · CPC title

• A61C5/40

  Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots · CPC title

• A61C1/12

  Angle hand-pieces · CPC title

• A61C1/185

  Drives or transmissions · CPC title

• A61C1/07

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