Method for fixing an expansion anchor to a substrate, in which a curable mass is introduced in the annular space around the expansion anchor

Patent metadata

Field	Value
Publication number	US-10202999-B2
Application number	US-201615770025-A
Country	US
Kind code	B2
Filing date	Oct 19, 2016
Priority date	Oct 23, 2015
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

A method for fixing an expansion anchor to a substrate includes introducing an anchoring zone and at least one part of a middle zone of a bolt of the expansion anchor into a hole in the substrate together with an expansion sleeve of the expansion anchor. The bolt is then moved relative to the expansion sleeve in a pull-out direction, as a result of which the expansion anchor is anchored to the wall of the hole. The space between the wall of the hole and the bolt is then filled to the height of at least one part of the middle zone with a curable mass such that the curable mass on the middle zone reaches up to an annular collar of the bolt, where the collar is configured as one piece with the bolt and is locally larger in cross-section, and the curable mass is cured.

First claim

The invention claimed is:

1. A method for fixing an expansion anchor to a substrate, wherein the expansion anchor comprises:
an expansion sleeve and a bolt which passes through the expansion sleeve, wherein the bolt has a load application zone for introducing a tensile force into the bolt, a middle zone axially adjacent to the load application zone, and an anchoring zone axially adjacent to the middle zone, wherein the expansion sleeve is disposed at a height of the anchoring zone, wherein the bolt has an expansion cone in the anchoring zone which pushes the expansion sleeve radially outwards to anchor the expansion anchor when the expansion cone is moved relative to the expansion sleeve in a pull-out direction, wherein the bolt has an annular collar configured as one piece with the bolt between the middle zone and the anchoring zone, wherein at the annular collar the bolt is larger in cross-section than in the adjacent middle zone, and wherein the annular collar forms an axial stop for the expansion sleeve;
and comprising the steps of:
inserting the anchoring zone and at least one part of the middle zone of the bolt together with the expansion sleeve into a hole in the substrate against the pull-out direction;
after the inserting, moving the bolt with the expansion cone relative to the expansion sleeve in the pull-out direction such that the expansion anchor is anchored to a wall of the hole;
after the moving, filling a space between the wall of the hole and the bolt with a curable mass such that the curable mass reaches up to the annular collar of the bolt; and
curing the curable mass disposed in the space between the wall of the hole and the bolt.

2. The method according to claim 1 , wherein a retaining ring made of the curable mass is formed when filling the space between the wall of the hole and the bolt, wherein the retaining ring abuts on the collar on a side of the collar facing the middle zone and surrounds the bolt, and wherein the retaining ring is cured.

3. The method according to claim 1 , wherein at least one part of the anchoring zone is free of the curable mass.

4. The method according to claim 1 , wherein the curable mass, after the curing, adheres to the wall of the hole more strongly than to the bolt.

5. The method according to claim 1 , wherein the bolt is substantially cylindrical in the middle zone.

6. The method according to claim 1 , wherein the bolt has an outer thread in the load application zone.

7. The method according to claim 1 , wherein the expansion anchor further comprises an injection washer which annularly surrounds the bolt and has a channel, wherein the space between the wall of the hole and the bolt is filled with the curable mass through the channel of the injection washer.

8. A fastening arrangement, comprising:
an expansion anchor, wherein the expansion anchor includes an expansion sleeve and a bolt which passes through the expansion sleeve, wherein the bolt has a load application zone for introducing a tensile force into the bolt, a middle zone axially adjacent to the load application zone, and an anchoring zone axially adjacent to the middle zone, wherein the expansion sleeve is disposed at a height of the anchoring zone, wherein the bolt has an expansion cone in the anchoring zone which pushes the expansion sleeve radially outwards to anchor the expansion anchor when the expansion cone is moved relative to the expansion sleeve in a pull-out direction, wherein the bolt has an annular collar configured as one piece with the bolt between the middle zone and the anchoring zone, wherein at the annular collar the bolt is larger in cross-section than in the adjacent middle zone, and wherein the annular collar forms an axial stop for the expansion sleeve;
wherein the expansion anchor is fixable to a substrate by the method according to claim 1 .

Assignees

• Hilti Ag

Inventors

• Steinberg Tanja
• Guida Giuseppe
• Sproewitz-Haefliger Kathrin
• Schaeffer Marc

Classifications

• F16B13/065

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

• F16B13/141 Primary

  Fixing plugs in holes by the use of settable material · CPC title

• E04B1/40

  Fixed Constructions · mapped topic

• E04B1/388

  Separate connecting elements (Connecting devices specially adapted for embedding in concrete E04B1/41; Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses E04B1/48) · CPC title