Polygonal cutting blade having circular arc-shaped groove in hole and cutting tool
US11446744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2017 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Apr 16, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23C2200/361
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A polygonal cutting blade having a circular arc-shaped groove in a hole includes a blade body composed of an upper surface, a lower surface and a plurality of main side surfaces connecting the upper surface and the lower surface. The blade body has a central hole penetrating through the upper surface and the lower surface, and is centrally symmetrical about a central axis of the central hole. At least one set of positioning side surface comprised of adjacent two of the main side surfaces is provided. An inner surface of the central hole has at least one circular arc-shaped groove fitting with a fastening screw for fixing the cutting blade. The circular arc-shaped groove directly faces toward an intersection of the two main side surfaces of the set of positioning side surface. A groove central axis of the circular arc-shaped groove has an offset distance from the central axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.