Power tool

• US 7,552,749 B2
• Filed: 07/11/2005
• Issued: 06/30/2009
• Est. Priority Date: 07/12/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Braun, Marco, Ahmad, Mohamed Zaidi, Jalil, Rezwan Iskandar, Kageler, Sven
• Primary Examiner(s): SELF, SHELLEY M
• Application Number:
  US11/178,763
• Publication Number:
  US 20060008334A1
• Time in Patent Office: 1,450 Days
• Field of Search: 144/136.95, 144/154.5, 144/48.5, 409180-182
• US Class Current: 144/136.95
• CPC Class Codes: B27C 5/10 Portable hand-operated wood-milling machines; Routers
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]

Abstract

A power tool has a housing, a tool, and a guard embracing the tool that is coupleable to the housing and axially adjustable relative, so that it is safer to handle because the guard is designed as a support foot and on its outside has a jacket piece of plastic with a nonslip, rough outer surface.

Claims

1. A power tool, comprising:

a housing having a free end;

a tool protruding from the free end of the housing;

a support foot composed of metal which embraces said tool, is couplable to said housing, and is axially adjustable relative to said housing;

a jacket piece composed, of non-metal which has a first grip surface;

first means for improving grip provided on said first grip surface of said jacket piece and enabling a user to safely operate the power tool, and wherein the jacket piece is releasably attached to an outside of the support foot, is dimensioned such that an inside diameter of the jacket piece precisely fits an outside diameter of the support foot, and is substantially congruent to the support foot so that the jacket piece is drawn like a second skin over the support foot;

wherein the support foot has a grip region on an outside of the support foot, comprising a second grip surface; and

wherein second means for improving grip is provided on the second grip surface of the support foot.

2. A power tool as defined in claim 1, wherein the first means for improving grip comprises a relatively rough outer surface.

3. A power tool as defined in claim 1, wherein the first means for improving grip comprises uniformly distributed indentations.

4. A power tool as defined in claim 3, wherein the uniformly distributed indentations are cup-shaped and have a diameter of 2 to 3 mm.

5. A power tool as defined in claim 1, wherein the jacket piece has a wail thickness of about 1 mm.

6. A power tool as defined in claim 1, wherein the second means for improving grip comprises uniformly distributed indentations.

7. A power tool as defined in claim 6, wherein the uniformly distributed indentations arc cup-shaped and have a diameter of 2 to 3 mm.

8. A power tool as defined in claim 1, wherein the jacket piece is composed of a soft plastic.

9. A power tool as defined in claim 1, wherein the support foot has a back and sides and the grip region is on the back and sides of the support foot.

10. A power tool as defined in claim 1, wherein the housing has a grip region and the housing grip region cooperates with the support foot grip region to form a combination grip region comprising both the housing grip region and the support foot grip region, and wherein third means for improving grip is provided on the housing in the grip region.

12. A power tool as defined in claim 1, wherein the support foot defines a first front recess and the jacket piece defines a second front recess which is congruent with the first front recess.

13. A power tool as defined in claim 1, wherein the support foot has clamping tabs and the jacket piece has clamping tabs which contact said support foot clamping tabs, and further comprising a clamping screw which fixes said jacket piece clamping tabs on said support foot clamping tabs, said clamping screw fixing the support foot and also passing through said jacket piece clamping tabs.

14. A power tool as defined in claim 1, wherein a clamping screw is means for releasably attaching the jacket piece to the outside of the support foot.

11. A power tool, comprising:

a housing having a free end;

a tool protruding from the free end of the housing;

a support foot composed of metal which embraces said tool, is couplable to said housing, and is axially adjustable relative to said housing;

a jacket piece composed of non-metal which has a jacket piece grip surface;

first means for improving grip provided on said jacket piece grip surface of said jacket piece and enabling a user to safely operate the power toot and wherein the jacket piece is releasably attached to an outside of the support foot, is dimensioned such that an inside diameter of the jacket piece precisely its an outside diameter of the support foot, and is substantially congruent to the support foot so that the jacket piece is drawn like a second skin over the support foot, wherein the housing has a grip region and the housing grip region cooperates wit the jacket piece grip surface to form a combination grip region comprising both the housing grip region and the jacket piece grip surface, and wherein second means for improving grip is provided on the housing in the housing grip region.

15. A power tool as defined in claim 11, wherein the support foot has a grip region on an outside of the support foot comprising a support foot grip surface, and wherein third means for improving grip is provided on the support foot grip surface.

16. A power tool as defined in claim 11, wherein the first means for improving grip comprises uniformly distributed indentations.

17. A power tool as defined in claim 16, wherein the uniformly distributed indentations are cap-shaped and have a diameter of 2 to 3 mm.

18. A power tool as defined in claim 11, wherein the jacket piece has a wall thickness of about 1 mm.

19. A power tool as defined in claim 11, wherein the jacket piece is composed of a soft plastic.

20. A power tool as defined in claim 11, wherein a clamping screw is means for releasably attaching the jacket piece to the outside of the support foot.

21. A power tool as defined in claim 11, wherein the second means for improving grip comprises uniformly distributed indentations.

22. A power tool as defined in claim 21, wherein the uniformly distributed indentations are cup-shaped and have a diameter of 2 to 3 mm.