Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications

Patent metadata

Field	Value
Publication number	US-9962167-B2
Application number	US-201514595590-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Jun 21, 2004
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The shank ( 12 ) of a disposable rotary cutting tool ( 10 ) comprises a pipe section ( 16 ) cut from a drawn metal pipe. The tool head ( 14 ) is formed from a cut-out ( 18 a, 18 b ) of a drawn metal sheet or a section of a metal tube by non-cutting machining. The pipe section ( 16 ) and the tool head ( 14 ) are advantageously attached by force fitting.

First claim

The invention claimed is:

1. Disposable rotary cutting tool for dental or medical applications comprising a tubular tool shank and a tool head attached to the tool shank, wherein the tool shank comprises a metal pipe section, the tool head is formed from a cut-out of a metal sheet or a section of a metal tube and the tool head is attached to the pipe section, and wherein the tool head comprises at least two cut-outs forming blades, the blades having complimentary slots that are retracted into one another in a crosswise manner to build the tool head with two crosswise arranged blades.

2. Cutting tool according to claim 1 , wherein the metal sheet is a drawn metal sheet and/or the pipe section is a drawn metal pipe section or the tube is a drawn metal tube.

3. Cutting tool according to claim 1 , wherein the tool head is manufactured by non-cutting machining.

4. Cutting tool according to claim 1 , wherein the tool head and the pipe section are driven one into the other.

5. Cutting tool according to claim 4 , wherein the tool head and the pipe section are fastened one to the other by force fitting.

6. Cutting tool according to claim 1 , wherein the tool shank comprises a further pipe section axially joined to the pipe section.

7. Cutting tool according to claim 6 , wherein the tool shank comprises a fastening connector formed by deformation of the pipe section and the further pipe section, respectively, in an end region away from the tool head.

8. Cutting tool according to claim 6 , wherein a fastening connector body is driven into an end region of the pipe section and further pipe section, respectively, away from the tool head.

9. Cutting tool according to claim 8 , wherein the fastening connector body is an injection molded plastic part.

10. Cutting tool according to claim 1 , wherein the pipe section comprises a radial monitoring window.

Assignees

• Straumann Holding Ag

Inventors

• Stephane Courvoisier

Classifications

• B23B49/00

  Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored (marking-out equipment B25H7/00; measuring devices, gauges G01B) · CPC title

• A61B90/94

  coded with symbols, e.g. text · CPC title

• B23B51/0473

  Details about the connection between the driven shaft and the tubular cutting part; Arbors · CPC title

• B23B51/04

  {Drills} for trepanning · CPC title

• Y10T407/1938

  Wedge clamp element · CPC title