Core bit
US7534076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Feb 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/907
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a core bit formed with a drill portion in a cylindrical shape formed with a boring blade on one end side thereof and a mounting portion in a cylindrical shape mounted to a chuck portion of a concrete drill on other end side of the drill portion, formed with an engaging portion capable of being engaged with an engaging portion on a side of the chuck portion at an outer peripheral face of the mounting portion for transmitting rotation of a side of the concrete drill via the engaging member, the outer peripheral face of the mounting portion on a side of the boring blade of the engaging member is formed with a flange portion in a shape of a flange having a diameter larger than an outer diameter of the engaging member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.