Medical impactor tool

Patent metadata

Field	Value
Publication number	US-10028754-B2
Application number	US-201514806337-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 22, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A power tool includes an output member, a drive mechanism operable to perform work on the output member in one of a first mode or a second mode, and an actuator for activating the drive mechanism in the first mode or the second mode based upon an amount of time the actuator is depressed.

First claim

What is claimed is:

1. A power tool comprising:
an output member;
a drive mechanism operable to perform work on the output member in one of a first mode or a second mode; and
an actuator for activating the drive mechanism in the first mode or the second mode based upon an amount of time the actuator is depressed;
wherein, in the first mode, the drive mechanism is operated for only a single drive cycle, and in the second mode, the drive mechanism is operated continuously until the actuator is released.

2. The power tool of claim 1 , wherein the first mode is a single impact mode and the second mode is a multi-impact mode.

3. The power tool of claim 1 , wherein, upon activation, the drive mechanism is initially operated in the first mode through a predetermined amount of time of the actuator being depressed, after which the drive mechanism transitions from operating in the first mode to the second mode.

4. The power tool of claim 1 , wherein the drive mechanism includes
a motor;
a screw drive operated by the motor in a reciprocating manner; and
a piston coupled to an output of the screw drive.

5. The power tool of claim 4 , wherein the drive mechanism further includes a movable cylinder driven by the piston in a reciprocating manner for impacting the output member.

6. The power tool of claim 5 , wherein the piston is located within the movable cylinder, and wherein the piston is driven in a forward direction to generate a vacuum within the movable cylinder, which accelerates the movable cylinder toward the output member.

7. The power tool of claim 6 , wherein the movable cylinder is held in a fixed position until a predetermined vacuum is reached therein, after which the movable cylinder is released and accelerated toward the output member.

8. The power tool of claim 1 , wherein the amount of time is between 100 milliseconds and 200 milliseconds.

9. The power tool of claim 1 , further comprising a broach coupled to the output member.

10. The power tool of claim 1 , wherein the actuator includes a magnetic switch.

Assignees

• Tti Macao Commercial Offshore Ltd
• Medical Entpr Llc

Inventors

• Johnson Henry Thomas
• Williams Brian Albert
• Smith Isiah Daniel
• Pedicini Christopher

Classifications

• A61B2017/00393

  with means for switching between functions · CPC title

• A61B17/1604 Primary

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61B17/1626

  Control means; Display units · CPC title

• A61B17/1659 Primary

  Surgical rasps, files, planes, or scrapers · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title