Anchor rod assembly secured by hardenable mass
US4747727A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1987 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 23, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/141
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An anchor rod assembly includes an axially elongated anchor rod to be secured in a borehole by a hardenable mass inserted into the borehole around the anchor rod. The anchor rod is divided by slots into a plurality of circumferentially spaced axially extending segments extending from the leading end of the anchor rod. The anchor rod has an axially extending central bore located radially inwardly of the segments. A filler piece is inserted into the central bore and the slots between the segments. The filler piece closes off the slots between the segments at the outer circumferential surface of the anchor rod. Due to the filler piece, the hardenable mass cannot flow into the slots between the segments and the central bore. As a result, the segments follow movement of the borehole wall during any widening of the borehole because of cracked development, and the anchor rod is retained in the borehole. A radially inwardly formed constriction in the outer circumferential surface of the segments adjacent the trailing end of the anchor rod improves deformability of the segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.