Wire tying power tool
US4362192A · kind A · utility
Inventors
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/123
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a power tool for binding concrete-reinforcing bars together with a wire tie, a predetermined length of wire is fed into a pair of jaws having loop-forming grooves therein. A rotatable inner mandrel carries a cutter bar while an outer mandrel is rotatably mounted on the inner mandrel. Radial flanges on the outer mandrel form openings with the cutter bar for the passage of the wire as it is formed into a loop by the jaws. Relative rotation of the inner mandrel relative to the outer mandrel cuts the wire and then twists the cut ends into a wire tie that binds the reinforcing bar. Controls are provided for properly positioning the openings for the passage of the wire upon each successive cycle of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.