Expansion anchor and method for disassembling an expansion anchor

Patent metadata

Field	Value
Publication number	US-11655843-B2
Application number	US-201816491562-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Mar 7, 2017
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A disassembly method for an anchor that is anchored in a hole and that has an anchor bolt is provided, whereby, during the disassembly procedure, a torque is applied to the bolt of the anchor that is anchored in the hole and, in this process, the anchor bolt is stressed until it breaks. An anchor which has a head and whose bolt has an engaging profile so that a torque can be applied to the anchor bolt is also provided.

First claim

What is claimed is:

1. An anchor comprising:
an anchor bolt having a head in a rear section of the anchor bolt; and
at least one expansion element arranged on the anchor bolt;
the anchor bolt having, in a front section, an expansion section for the expansion element, the anchor bolt tapering towards a rear in the expansion section, the expansion element being configured to strike the expansion section of the anchor bolt to radially expand the expansion element to anchor the anchor;
the anchor bolt having an engaging profile so that a torque can be applied to the anchor bolt; wherein the engaging profile is arranged on the head and the head has a collar projecting beyond the engaging profile and adjoining a rear of the engaging profile.

2. The anchor as recited in claim 1 further comprising a washer surrounding the anchor bolt.

3. The anchor as recited in claim 2 wherein the head has a collar projecting beyond the engaging profile and adjoining a rear of the engaging profile, the engaging profile being arranged between the collar and the washer.

4. The anchor as recited in claim 1 wherein the expansion section is permanently arranged on the anchor bolt.

5. The anchor as recited in claim 4 wherein the expansion section is permanently joined to the head of the anchor bolt.

6. The anchor as recited in claim 1 wherein the engaging profile is in the form of an external polygonal profile.

7. The anchor as recited in claim 1 wherein the anchor bolt has a neck section to accommodate the expansion element, the anchor bolt having a minimum overall cross section in the neck section.

8. The anchor as recited in claim 1 wherein the anchor bolt including the head and the expansion section is configured monolithically without joints.

9. The anchor as recited in claim 1 wherein the head is permanently arranged on the anchor bolt.

10. A disassembly method for an anchor anchored in a hole, the anchor including an anchor bolt, the disassembly method comprising:
applying a torque to the anchor bolt of the anchor anchored in the hole to stress the anchor bolt until the anchor bolt breaks; and
wherein the anchor bolt breaks to release anchoring of an add-on part to a substrate, the anchoring having been effectuated by the anchor.

11. The method as recited in claim 10 wherein the anchor breaks inside the hole.

12. The method as recited in claim 10 wherein the anchor is an expansion anchor.

13. The method as recited in claim 10 wherein the anchor bolt has a head and the torque is applied to the head of the anchor bolt.

14. The method as recited in claim 10 wherein the torque is applied to the anchor bolt via a disassembly tool.

15. The method as recited in claim 10 wherein the anchor bolt tapers towards a rear in the expansion section, the expansion element being configured to strike the expansion section of the anchor bolt to radial expand the expansion element to anchor the anchor.

16. A disassembly method for an anchor anchored in a hole, the anchor including an anchor bolt, the disassembly method comprising:
applying a torque to the anchor bolt of the anchor anchored in the hole to stress the anchor bolt until the anchor bolt breaks; and
applying a tensile force to the bolt at the same time as the torque so that the anchor bolt is stressed until the anchor bolt breaks.

17. The method as recited in claim 16 wherein anchor bolt breaks to release anchoring of an add-on part to a substrate, the anchoring having been effectuated by the anchor.

18. The method as recited in claim 16 wherein the anchor breaks inside the hole.

19. The method as recited in claim 16 wherein the anchor is an expansion anchor.

20. The method as recited in claim 16 wherein the anchor bolt has a head and the torque is applied to the head of the anchor bolt.

21. The method as recited in claim 16 wherein the torque is applied to the anchor bolt via a disassembly tool.

22. The method as recited in claim 16 wherein the anchor bolt has a head in a rear section of the anchor bolt; and the anchor further includes at least one expansion element arranged on the anchor bolt; the anchor bolt having, in a front section, an expansion section for the expansion element; the anchor bolt having an engaging profile so that the torque can be applied to the anchor bolt.

23. The method as recited in claim 16 wherein the anchor bolt tapers towards a rear in the expansion section, the expansion element being configured to strike the expansion section of the anchor bolt to radial expand the expansion element to anchor the anchor.

Assignees

• Hilti Ag

Inventors

• Ziltener Michael
• Dijkhuis Arjen Detmer
• Haeussler Karl

Classifications

• F16B13/045

  having axially compressing parts allowing the clamping of an object tightly to the wall · CPC title

• F16B31/021 Primary

  by means of a frangible part (F16B31/025, F16B31/028 take precedence; break members in torque limiters or torque indicators in wrenches or screwdrivers B25B23/1415) · CPC title

• F16B13/065 Primary

  fastened by extracting the screw, nail or the like · CPC title