Object binding
US9593496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2006 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Jun 6, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/122
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for tying a wire (46, 52) around one or more objects such as concrete reinforcing bars (2) is disclosed. It comprises means for passing the wire (46, 52) in a loop around the bars and a rotatable head 4 for twisting the ends of the loop together. The head (4) has at least one gripping means such as a variable force clutch (32) for gripping the wire, the gripping means being adapted to provide a variable gripping force so as to apply a predetermined tension to the wire during at least a first phase of twisting. Also disclosed is pre-feeding the wire between tying operations; conditioning the surface of the wire; and using the electrical conductivity of the reinforcing bars to verify that the bars are present before tying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.