Tool for removing a chisel

Patent metadata

Field	Value
Publication number	US-9157320-B2
Application number	US-201213611735-A
Country	US
Kind code	B2
Filing date	Sep 12, 2012
Priority date	May 26, 2008
Publication date	Oct 13, 2015
Grant date	Oct 13, 2015

Abstract

A tool for removing a chisel, in particular from a chisel holder, having a base element which receives an actuating member, wherein the actuating member has an expeller mandrel. The actuating member is adjustable along a displacement direction. In order to be able to perform the removal simply and rapidly, the actuating member of this invention is indirectly or directly coupled to a piston of a fluid-charged cylinder, or to an electric motor unit.

First claim

What is claimed is:

1. A tool for removing a chisel from a chisel holder, comprising:
a fork-shaped base element including first and second elongated base element portions separated by a space, the base element including a base element support surface defined on the first and second elongated base element portions and facing in a first direction and configured to support the base element directly or indirectly against the chisel holder, the base element and the first and second elongated base element portions being formed in one piece;
an actuating member pivotally connected to the base element, the actuating member being pivotable relative to the base element from an initial position, in a direction opposite the first direction and toward the space between the first and second elongated base element portions to a removal position to remove the chisel from the chisel holder the actuating member having a distal end arranged to move on a path aimed between the first and second elongated base element portions as the actuating member moves from the initial position toward the removal position; and
a power source including a cylinder-piston system or an electric motor unit mounted on the base element and operably associated with the actuating member to move the actuating member between the initial position and the removal position.

2. The tool of claim 1 , wherein the base element includes a stop face spaced apart from the base element support surface, the stop face being configured for placement against the chisel holder.

3. A tool for removing a chisel from a chisel holder, comprising:
a base element including a base element support surface configured to support the base element directly or indirectly against the chisel holder;
an actuating member pivotally connected to the base element, the actuating member being pivotable relative to the base element from an initial position to a removal position to remove the chisel from the chisel holder; and
a power source mounted on the base element and operably associated with the actuating member to move the actuating member between the initial position and the removal position;
wherein the base element includes at least one stop surface defined on the base element and configured to abut the actuating member to limit movement of the actuating member.

4. The tool of claim 1 , further comprising:
a spring element biasing the actuating member toward the initial position.

5. The tool of claim 1 , further comprising:
a handle attached to the base element.

6. A tool for removing a chisel from a chisel holder, the chisel holder having a holder support surface, the tool comprising:
a fork-shaped base element configured to engage the holder support surface of the chisel holder, the fork-shaped base element including first and second elongated base element portions separated by a space, the base element and the first and second elongated base element portions being formed in one piece;
an actuating member pivotally connected to the base element, the actuating member being configured such that a distal end of the actuating member pivots toward the space between the first and second elongated base element portions to engage the chisel when the base element is engaged with the holder support surface; and
a powered actuator drive including a cylinder-piston system or an electric motor unit coupled to the actuating member for pivoting the actuating member relative to the base element to expel the chisel from the chisel holder.

7. The tool of claim 6 , wherein the base element includes a stop face spaced apart from the base element support surface, the stop face being configured for placement against the chisel holder.

8. A tool for removing a chisel from a chisel holder, the chisel holder having a holder support surface, the tool comprising:
a base element configured to engage the holder support surface of the chisel holder;
an actuating member pivotally connected to the base element, the actuating member being configured to engage the chisel when the base element is engaged with the holder support surface; and
an actuator drive coupled to the actuating member for pivoting the actuating member relative to the base element to expel the chisel from the chisel holder;
wherein the base element includes at least one stop surface defined on the base element and configured to abut the actuating member to limit movement of the actuating member.

9. The tool of claim 6 , wherein:
the actuating member is movable between an initial position and a removal position; and
further comprising a spring element biasing the actuating member toward the initial position.

10. The tool of claim 6 , further comprising:
a handle attached to the base element.

11. A tool for removing a chisel from a chisel holder, comprising:
a fork-shaped base element having first and second elongated base element portions separated by a space, the base element including a base element support surface defined on the first and second elongated base element portions and facing in a first direction and configured to support the base element directly or indirectly against the chisel holder, the base element and the first and second elongated base element portions being formed in one piece;
an actuating member mounted on the base element, the actuating member having a distal end movable relative to the base element from an initial position toward the space between the first and second elongated base element portions to a removal position to remove the chisel from the chisel holder; and
a power source including a cylinder-piston s stem or an electric motor unit mounted a on the base element and operably associated with the actuating member to move the actuating member between the initial position and the removal position.

12. The tool of claim 11 , wherein the base element includes a stop face spaced apart from the base element support surface, the stop face being configured for placement against the chisel holder.

13. A tool for removing a chisel from a chisel holder, comprising:
a fork-shaped base element including a base element support surface configured to support the base element directly or indirectly against the chisel holder;
an actuating member mounted on the base element, the actuating member being movable relative to the base element from an initial position to a removal position to remove the chisel from the chisel holder; and
a power source mounted on the base element and operably associated with the actuating member to move the actuating member between the initial position and the removal position;
wherein the base element includes at least one stop surface defined on the base element and configured to abut the actuating member to limit movement of the actuating member.

14. The tool of claim 11 , further comprising:
a spring element biasing the actuating member toward the initial position.

15. The tool of claim 11 , further comprising:
a handle attached to the base element.

16. A tool for removing a chisel from a chisel holder, the chisel holder having a holder support surface, the tool comprising:
a fork-shaped base element including first and second elongated base element portions separated by a space, the base element including a base element support surface defined on the first and second elongated base element portions and facing in a first direction and configured to engage the holder support surface of the chisel holder, the base element and the first and second elongated base element portions being formed in one piece;
an actuating member movable relative to the bas

Assignees

• Lehnert Thomas
• Lenz Martin
• Holl Bernd
• Hähn Günter
• Wirtgen Gmbh

Inventors

• Lehnert Thomas
• Lenz Martin
• Holl Bernd
• Hähn Günter

Classifications

• E21C35/19 Primary

  Means for fixing picks or holders · CPC title

• Y10T29/53704

  tool chuck and tool · CPC title

• Y10T29/5383

  having fluid operator · CPC title

• E21C35/188

  characterised by adaptations to use an extraction tool · CPC title

• B25B27/026

  fluid driven · CPC title