Saw blade for cutting fiber cement
US7117863B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28D1/121
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved circular saw blade designed for cutting fiber cement workpieces, which are becoming more and more prevalent on the construction site, includes a PCD/carbide tip (16) mounted in the rim (31) of the saw blade (10) at six, rather than the usual for locations, equally spaced around the blade. The tips are mounted adjacent a relatively large-diameter, semi-circular gullet (20), which itself is preceded by a chip and dust minimizer (18). The minimizer includes several alternating hills (52) and valleys (54) formed in the rim of the saw blade, each hill and valley having the same radius, producing a sinuous array essentially centered on the rim of the blade. It has been discovered that such a dust and chip minimizer reduces the level of dust and chips produced by the blade and clears the same from the kerf generated in the blade-workpiece interface. Ideally, all of the parameters and relief angles for the surfaces on the saw blade tip can be generated by cutting an array of such tips from a large-diameter blank (110) of PCD fused to a layer of tungsten carbide (72), and by mounting the tips onto the blade in such an orientation as to present, preferably, a negative hook or rak…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.