IP Library › Granted Patent US 8,272,453
Granted Patent B2
US 8,272,453 · App. 12/866,961 · Granted Sep 25, 2012

Handheld power tool

Assignee: Robert Bosch GmbH
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Quick Facts
Patent No.
US 8,272,453
App. No.
12/866,961
Granted
Sep 25, 2012
Kind
B2
Abstract

The invention relates to a handheld machine tool, in particular a hammer drill and/or chipping hammer. The tool has an impacting unit which has at least one impacting pin and a guide unit which is provided for guiding the impacting pin. It is proposed that the guide unit is formed from at least two different materials.

Claims (9)

1. A handheld power tool comprising a striking unit mounted within a striker tube that has at least one striking pin and has a guide unit surrounding said at least one striking pin for guiding said at least one striking pin, said striking unit disposed in said power tool for striking said at least one striking pin in at least one direction, said guide unit formed of at least one metal guide element and at least one elastomeric damping element, said at least one metal guide element further includes at least one bracing element having a first section extending between said elastomeric damping element and said at least one striking pin and a second section extending radially outward and along said elastomeric damping element for bracing said damping element in said at least one direction and wherein said elastomeric damping element has one end adjacent said first section in contact with said striker tube and an opposite end in contact with said at least one striking pin.

2. The handheld power tool as defined by claim 1 , wherein the metal guide element is embodied as a sheet-metal component.

3. The handheld power tool as defined by claim 1 , wherein the metal guide element is embodied at least partially as a sheet-metal sleeve.

4. The handheld power tool as defined by claim 1 , wherein the guide unit at least partially has a guide face for guiding the striking pin.

5. The handheld power tool as defined by claim 1 , wherein the metal guide element is embodied at least partially in one piece with the damping element.

6. The handheld power tool as defined by claim 1 , wherein the elastomeric damping element rests at least partially on a radially inward-facing surface of the bracing element.

7. The handheld power tool as defined by claim 1 , wherein the elastomeric damping element and the bracing element are embodied as at least partially in one piece.

8. The handheld power tool as defined by claim 1 , wherein the power tool is a rotary and/or chisel hammer having a hammer tube.

9. The handheld power tool as defined by claim 8 , wherein said second section of said bracing element braces said damping element on said hammer tube.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 21, 2010
From: ULLRICH, ANDRE; ENGEL, RICHARD
To: ROBERT BOSCH GMBH
Reel/Frame 025024/0785 →
Priority Claims (1)
DE 10 2008 010 100 · Feb 20, 2008 · national
Continuity (1)
Related Publication 20100326688A1 · Dec 30, 2010