Hole saw having plug ejection feature
US5435672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Aug 5, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/895
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hole saw having plug ejection feature. Using the arbor and arbor nut of the present invention, the arbor of an ordinary commercially available hole saw is replaced, the arbor nut of the present invention being threaded into the hole saw cup axial threaded inlet, to convert the ordinary hole saw into a plug ejecting hole saw. The arbor and arbor nut of the plug ejecting hole saw of the present invention function as the arbor of an ordinary hole saw when used with to drill the desired hole, the drill turning in a clockwise direction. When the drill rotation is reversed to a counter clockwise direction and the hole saw cup is held stationary, the arbor of the present invention screws through the also stationary arbor nut, thereby ejecting the plug from the hole saw cup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.