Hole cutting tools
US5803678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jun 20, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/906
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved hole saw for cutting holes having a cylindrical shape that includes, along its cutting edge, a plurality of repetitive groups of saw teeth having at least four radially displaced trailing teeth. The displacement of each trailing tooth is such that it has a substantially greater displacement than for any other tooth of said group preceding said trailing tooth. The displacement of each tooth being such that the cutting edge thereof is characterized as being movable along a cutting path different from the cutting paths of the other teeth of the group as the hole saw is rotated whereby each tooth cuts chips of uniform size. Each group of teeth may include a raker tooth having no substantial displacement with respect to the side surfaces of the hole saw. The raker tooth may be the same height or of greater height than the trailing teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.