Tool

Patent metadata

Field	Value
Publication number	US-9765619-B2
Application number	US-201514822964-A
Country	US
Kind code	B2
Filing date	Aug 11, 2015
Priority date	Jul 2, 2007
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A tool for mounting a chisel on a chisel holder, having an actuating member, which has a push-off section, wherein the actuating member can be displaced along a displacement direction. It is possible to simplify changing the chisel if the actuating member can be shifted by an actuating unit. The actuating unit has a draw-in section, which is spaced apart from the push-off section and is arranged transversely with respect to the displacement direction of the actuating member. The actuating member can be power-operated bidirectionally in the displacement direction by the actuating unit.

First claim

What is claimed is:

1. A method of installing a chisel in a chisel holder, comprising:
(a) extending an actuating member of a mounting tool through a chisel receptacle bore of the chisel holder;
(b) engaging the actuating member with a shank of the chisel; and
(c) retracting the actuating member and pulling the chisel shank into the chisel receptacle bore.

2. The method of claim 1 , further comprising:
during step (a), pushing a worn chisel out of the chisel receptacle bore.

3. The method of claim 2 , further comprising:
during step (a), supporting a first end of the mounting tool against a first support surface of the chisel holder.

4. The method of claim 3 , further comprising:
during step (c), supporting a second end of the mounting tool against a second support surface of the chisel holder, the first and second support surfaces of the chisel holder facing each other.

5. The method of claim 1 , further comprising:
during step (c), supporting an end of the mounting tool against a support surface of the chisel holder.

6. The method of claim 1 , further comprising:
prior to step (a), inserting the mounting tool into a cavity of the chisel holder, the cavity being communicated with the chisel receptacle bore.

7. A method of replacing a chisel in a chisel holder, comprising:
(a) engaging a mounting and demounting tool with the chisel and the chisel holder;
(b) extending an actuating member of the tool in an actuating direction and pushing the chisel out of the chisel holder;
(c) engaging the actuating member with a replacement chisel; and
(d) retracting the actuating member opposite to the actuating direction and back toward the tool and pulling the replacement chisel into the chisel holder.

8. The method of claim 7 , further comprising:
during step (a), engaging a shank end of the chisel with a push-off section of the tool.

9. The method of claim 7 , further comprising:
during step (c), engaging a cylindrical support element of a shank of the chisel with a draw-in section of the tool.

10. The method of claim 7 , further comprising:
during step (b), supporting an end of the tool against a support surface of the chisel holder facing in the actuating direction.

11. The method of claim 7 , further comprising:
during step (d), supporting an end of the tool against a support surface of the chisel holder facing opposite to the actuating direction.

12. The method of claim 7 , further comprising:
during step (a), manually inserting the tool into a cavity of the chisel holder using a handle of the tool.

13. A method of replacing a chisel in a chisel holder, the chisel holder having a chisel receptacle and a cavity adjoining an inner end of the chisel receptacle, the chisel having a chisel shank received through the chisel receptacle and extending into the cavity, the chisel shank having a laterally protruding support element, comprising:
(a) inserting a mounting and demounting tool into the cavity of the chisel holder so that the laterally protruding support element of the chisel shank is received between a push-off section and a draw-in section of an actuating member;
(b) extending the actuating member from the tool and pushing the chisel out of the chisel holder;
(c) engaging a laterally protruding support element of a replacement chisel with the actuating member; and
(d) retracting the actuating member and drawing the replacement chisel into the chisel receptacle.

14. The method of claim 13 , wherein:
step (a) further includes engaging the tool with an inner surface of the cavity and thereby aligning the actuating member with the chisel receptacle.

15. The method of claim 13 , further comprising:
during step (b), supporting a first end of the tool against a first support surface of the cavity.

16. The method of claim 15 , further comprising:
during step (d), supporting a second end of the tool opposite the first end against a second support surface of the cavity.

17. The method of claim 15 , wherein:
in step (a) the tool is manually inserted into the cavity using a handle of the tool.

18. The method of claim 17 , further comprising:
after step (d), manually removing the tool from the cavity using the handle of the tool.

19. The method of claim 15 , wherein:
in steps (b) and (d) the actuating member is extended and retracted, respectively, by a powered actuator.

Assignees

• Wirtgen Gmbh

Inventors

• Hähn Günter
• Lenz Martin
• Lehnert Thomas
• Abresch Stefan

Classifications

• E21C35/188

  characterised by adaptations to use an extraction tool · CPC title

• Y10T29/53909

  Means comprising hand manipulatable tool · CPC title

• Y10T29/5383

  having fluid operator · CPC title

• Y10T29/53796

  Puller or pusher means, contained force multiplying operator · CPC title

• Y10T29/53683

  Spreading parts apart or separating them from face to face engagement · CPC title