Drilling tool assembly including a step drill bit
US11453069B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2019 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Aug 22, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2260/022
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drilling tool includes a step drill bit and an arbor assembly. The arbor assembly includes a shank having a first end, a second end opposite the first end, and a longitudinal axis extending through the first and second ends. The first end of the shank is removably coupled to the step drill bit, and the second end of the shank is configured to be coupled to a power tool. The arbor assembly includes a sleeve moveable along the shank parallel to the longitudinal axis, and a ball bearing disposed on the sleeve and moveable with the sleeve. The ball bearing engages the step drill bit to releasably secure the step drill bit to the shank. When the sleeve moves toward the second end of the shank, the ball bearing moves radially inward and disengages the step drill bit, allowing removal of the step drill bit from the shank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.