Apparatus for cutting precision notches in work surfaces
US4948933A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Feb 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/013
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A portable electrode arc cutting tool 11 for cutting internal and external precision notches in a work surface in which the tool is releasably attachable to the work surface and a calibrated feed control (14,112,185) is used to bring a surface configured electrode member (68,101,173) into close proximity to the work surface. Thereafter, upon the application of arc discharges of electrical current between the electrode member and the work surface and use of a cooling and flushing fluid, the electrode member cuts a precision depth notch in the work surface in an embodiment for internal use within pipe. The tool includes releasable attachment means (12,91,141) for stabilizing the tool within the bore of the pipe. In a tool used for external cutting of notches, the tool is releasably attached to an outer work surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.