Hand-held power tool

• US 20090294144A1
• Filed: 08/12/2009
• Published: 12/03/2009
• Est. Priority Date: 02/18/2005
• Status: Active Grant

• Current Assignee: Andreas Strasser, Axel Kuhnle, Christian Koepf, Gerhard Meixner, Heiko Roehm, Joachim Schadow, Juergen Lennartz, Karl Frauhammer, Ralph Dammertz, Willy Braun
• Original Assignee: Andreas Strasser, Axel Kuhnle, Christian Koepf, Gerhard Meixner, Heiko Roehm, Joachim Schadow, Juergen Lennartz, Karl Frauhammer, Ralph Dammertz, Willy Braun
• Inventors: Koepf, Christian, Dammertz, Ralph, Kuhnle, Axel, Schadow, Joachim, Meixner, Gerhard, Strasser, Andreas, Frauhammer, Karl, Braun, Willy, Roehm, Heiko, Lennartz, Juergen
• Granted Patent: US 7,886,839 B2
• Time in Patent Office: Days
• US Class Current: 173/162.2
• CPC Class Codes: B25D 17/043 Handles resiliently mounted relative to the hammer housing B25D17/046 takes precedence

Abstract

A hand-held power tool has a main element; a main handle fastened to the main element, the main handle being supported such that the main handle is movable relative to the main element, the main element including a tool fitting that defines a tool axis and the center of gravity that defines a normal direction oriented perpendicular to the tool axis and pointing toward the center of gravity, the main element being moved out of a stationary position toward the main handle so that a portion of at least 10% by weight of the main element is guided with a movement component in the normal direction along a trajectory.

Claims

1. A hand-held power tool, comprising:

a main element;

a main handle fastened to said main element, said main handle being supported such that said main handle is movable relative to said main element, said main element including a tool fitting that defines a longitudinal tool axis and a center of gravity, wherein a normal direction that originates from said longitudinal tool axis and is oriented perpendicular to said longitudinal tool axis points toward said center of gravity; and

means for fastening said main handle to said main element configured so that when said main element is moved out of a stationary position toward said main handle at least a portion of said main element is guided along a trajectory having a movement component in the normal direction, wherein said means for fastening said main handle to said main element are configured so that the trajectory of the portion extends with a slant of at least 10°

relative to an imaginary flat surface extending through the tool axis, with the normal direction as the surface normal, in a direction of a half-space in which the center of gravity is located.

2. The hand-held power tool as defined in claim 1, wherein means for fastening is configured so that said main handle is swivelable around at least two swivel axes relative to said main element.

3. The hand-held power tool as defined in claim 2, wherein said means for fastening include two rotating elements configured so that said main handle is swivelable via said two rotating elements around said two swivel axes and relative to said main element.

4. The hand-held power tool as defined in claim 3, wherein said rotating elements have different lengths.

5. The hand-held power tool as defined in claim 3, wherein said rotating elements are each supported in a support at their ends facing away from said main handle, and a straight line extending through the supports form an angle >

45°

with said tool axis.

6. The hand-held power tool as defined in claim 1, wherein said means for fastening is configured so that the motion of said main handle relative to said main element is kept within a single dimension.

7. The hand-held power tool as defined in claim 1, wherein said main handle is stationary, said main element making a rotational movement around a joint-free axis of rotation when it moves from a stationary position and approaches said main handle.

8. The hand-held power tool as defined in claim 7, wherein said main handle, relative to said tool axis, is located behind said tool fitting, and said axis of rotation is located completely in front of said handle.

9. The hand-held power tool as defined in claim 7, wherein said main handle, relative to said tool axis is located behind said tool fitting, and said axis of rotation as a whole is located in front of said center of gravity.

10. The hand-held power tool as defined in claim 1, wherein said portion is a portion of at least 10% by weight of said main element.

11. The hand-held power tool as defined in claim 1, wherein said means for fastening said main handle to said main element are configured so that the movement component of the portion in the normal direction comprises at lest 18% of the total movement of the portion.

12. The hand-held power tool as defined in claim 1, wherein said means for fastening said main handle to said main element are configured so that said trajectory of said portion extends with a slant of at lest 20°

relative to said flat surface.

13. The hand-held power tool as defined in claim 1, wherein said means for fastening said main handle to said main element are configured so that said trajectory of said portion extends with a slant of at least 30°

relative to said flat surface.

14. The hand-held power tool as defined in claim 1, wherein said means for fastening said main handle to said main element are configured so that said trajectory of said portion extends with a slant of at lest 60°

relative to said flat surface.

15. The hand-held power tool as defined in claim 1, wherein said means for fastening said main handle to said main element are configured so that said trajectory is a one-dimensional, circular motion.

16. The hand-held power tool as defined in claim 6, wherein said means for fastening said main handle to said main element are configured so that said trajectory is straight.

17. The hand-held power tool as defined in claim 16, comprising at least one parallel guide, wherein said parallel guide supports the main handle such that the main handle is displaceable relative to the main element in a translational motion.

18. The hand-held power tool as defined in claim 1, comprising a motor with a motor axis oriented substantially perpendicularly to the tool axis.

19. The hand-held power tool as defined in claim 1, comprising a stop which is designed such that the trajectory of the portion starts from the stationary position with a slant of at least 10°

relative to the flat surface.

20. The hand-held power tool as defined in claim 1, further comprising a spring element, wherein said means for fastening are configured so that said main handle is swivelable around at least one swivel axis relative to said main element, wherein said means for fastening include at least one rotating element configured so that said main handle is swivelable via said rotating element around said swivel axis and relative to said main element, wherein said spring element extends mainly in a selected direction, wherein said selected direction includes only angles relative to the surface that are greater than 10°

, wherein the selected direction is substantially perpendicular to a direction in which the rotating element extends mainly when the main element is in the stationary position.

21. The hand-held power tool as defined in claim 20, wherein the direction in which the spring element extends includes only angles relative to the surface that are greater than 30°

.

22. A hand-held power tool, comprising:

a main element;

a main handle fastened to said main element, said main handle being supported such that said main handle is movable relative to said main element, said main element including a tool fitting that defines a longitudinal tool axis and a center of gravity, wherein a normal direction that is oriented perpendicular to said longitudinal tool axis points toward said center of gravity; and

means for fastening said main handle to said main element configured so that when said main element is moved out of a stationary position toward said main handle, said main element is guided along a trajectory having a movement component in the normal direction, wherein said means for fastening said main handle to said main element are configured so that said main element performs a relative movement to the main handle during its movement on the trajectory, wherein the relative movement is a rotation about a single axis.