Machine tool device

Patent metadata

Field	Value
Publication number	US-9522465-B2
Application number	US-201214125920-A
Country	US
Kind code	B2
Filing date	Apr 26, 2012
Priority date	Jun 16, 2011
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A machine tool device, particularly a hand-held machine tool device, includes at least one screw that is configured to secure at least one metal component to at least one additional component in a form-fitting manner. The machine tool further includes an electrical insulating unit that is configured to prevent the conduction of current at least between the metal component and the screw.

First claim

The invention claimed is:

1. A power-tool device, comprising:
an external housing;
an internal metallic housing;
a cover cap on the external housing that covers the internal metallic housing and is configured to be gripped by a user;
at least one screw that extends through the cover cap and the internal metallic housing and secures the cover cap and the internal metallic housing to the external housing; and
an electrical insulating unit configured to prevent conduction of current at least between the internal metallic housing and the screw.

2. The power-tool device at least as claimed in claim 1 , wherein the electrical insulating unit comprises at least one electrically insulating surface coating.

3. The power-tool device as claimed in claim 2 , wherein the surface coating includes a non-conducting material applied electrolytically.

4. The power-tool device as claimed in claim 1 , wherein the at least one screw comprises a smooth partial region.

5. The power-tool device as claimed in claim 4 , wherein the smooth partial region adjoins a screw head.

6. The power-tool device as claimed in claim 1 , wherein the electrical insulating unit comprises at least one additional insulating element configured to be disposed between the screw and the internal metallic housing.

7. The power-tool device as claimed in claim 1 , further comprising at least one insulating rib disposed in a screw hole in the internal metallic housing that is provided to receive the screw.

8. The power-tool device as claimed in claim 1 , wherein the internal metallic housing comprises a transmission housing.

9. The power-tool device as claimed in claim 1 , wherein the power-tool device is configured as a hand-held power-tool device.

10. A portable power tool, comprising:
a power-tool device including:
an external housing;
an internal metallic housing;
a cover cap on the external housing that covers the internal metallic housing and is configured to be gripped by a user;
at least one screw that extends through the cover cap and the internal metallic housing and secures the cover cap and the internal metallic housing to the external housing; and
an electrical insulating unit configured to prevent conduction of current at least between the internal metallic housing and the screw.

11. The portable power tool as claimed in claim 10 , further comprising a bevel gear transmission.

12. The portable power tool as claimed in claim 10 , wherein the portable power tool is configured as a hand-held power tool, and wherein the power-tool device is configured as a hand-held power tool device.

Assignees

• Yeoh Sim Teik
• Abd Rahman Khiri
• Ng Chin Aun
• Bosch Gmbh Robert

Inventors

• Yeoh Sim Teik
• Abd Rahman Khiri
• Ng Chin Aun

Classifications

• B23D49/11

  for special purposes, e.g. offset-blade hand; {Hand saws having spaced blades; Hand saws for sawing grooves or square holes} · CPC title

• B23D61/026

  Composite body, e.g. laminated · CPC title

• F16B5/02

  by means of fastening members using screw-thread ({F16B5/0004 takes precedence}; construction of screw-threaded connections F16B25/00 - F16B39/00) · CPC title

• F16B35/00

  Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws ({F16B33/008 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275; using screws with adjustment sleeves F16B5/0283}; thread cutting screws F16B25/00) · CPC title

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title