Drill bit assembly
US5630682A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1995 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Aug 11, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T409/304088
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit assembly has a housing having a central passageway including a pressure chamber and a vacuum chamber. The pressure chamber is connectable with a pressure source and the vacuum chamber is connectable with a vacuum source. The pressure chamber and vacuum chamber are in fluid communication with each other. A bearing assembly has an outer race rigidly mounted within the pressure chamber and an inner race for frictionally engaging the drill bit. A bracket mounts the housing with the drill bit extending through the central passageway. A seal is formed between the pressure chamber and the vacuum chamber as fluid, such as air, from the pressure source flows into the pressure chamber to the vacuum chamber for exhausting to the vacuum source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.