# US 2014/0154025 A1 · Expansion bushing dowel

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0154025 A1
- Document ID: US20140154025A1
- Status: Published application
- Kind: A1
- Application number: 14/003,731
- Filed: 2012-05-07
- Published: 2014-06-05
- Earliest claimed: 2011-03-07
- Inventors: Aurelie Bergez; Alain Gauthier; Jean-Paul Barthomeuf
- Web page: https://patentgrep.com/patent/US20140154025A1

## CPC

- F16B 13/063: {by the use of an expander}
- F16B 13/065: {fastened by extracting the screw, nail or the like}
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

The dowel comprises: i) a stem with, at one end, fastening means and, at the other end, an expansion cone; and ii) an expansion bushing mounted around a portion of the stem adjacent to the expansion cone and through which the expansion cone is intended to be moved so as to anchor the dowel into an anchoring hole of a supporting material. According to the invention, the expansion bushing is free of slits and drilled with expansion holes along an opening area of the bushing.

## Claims

### Claim 1

An expansion bushing dowel comprising:
i) a stem with, at one end, fastening means and, at the other end, an expansion cone; and
ii) an expansion bushing mounted around a portion of the stem adjacent to the expansion cone and through which the expansion cone is intended to be moved so as to anchor the dowel into an anchoring hole in a supporting material, the expansion bushing being free of slits,
characterized by the fact that the expansion bushing is drilled with expansion holes along an opening area of the bushing.

### Claim 2 (depends on 1)

The dowel according to claim 1, wherein the bushing comprises two holes.

### Claim 3 (depends on 1)

The dowel according to claim 1, wherein the bushing comprises, on its edge turned to the fastening means of the stem, anchoring studs arranged to be anchored into the anchoring hole wall.

### Claim 4 (depends on 1)

The dowel according to claim 1, wherein the bushing has a frustoconical shape of a larger diameter on its edge turned to the fastening means of the stem.

### Claim 5 (depends on 1)

The dowel according to claim 1, wherein said expansion holes are arranged in a section being normal to the bushing.

### Claim 6 (depends on 1)

The dowel according to claim 1, wherein the expansion holes are regularly distributed around the bushing (3).

### Claim 7 (depends on 3)

The dowel according to claim 3, wherein the anchoring studs are regularly distributed on the periphery of the corresponding edge of the bushing.

### Claim 8 (depends on 1)

The dowel according to claim 1, wherein an outer peripheral shoulder is provided.

### Claim 9 (depends on 3)

The dowel according to claim 3, wherein the expansion holes are of a circular shape and the anchoring studs have a half-tip shape protruding outside the bushing.

### Claim 10 (depends on 1)

The dowel according to claim 1, wherein the bushing is made of a metal sheet blank within which expansion holes and anchoring studs are arranged and which has a ring-shaped skirt around the related portion of the stem.

### Claim 11 (depends on 1)

The dowel according to claim 1, wherein the stem shows an outer radial shoulder forming an axial abutment for the bushing.