Earth connections for workpieces
US7170031B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2005 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Mar 24, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/32
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to earth connections to workpieces particularly a workpiece to which an arc is to be struck, and more particularly to a workpiece that is underwater. It is of considerable importance that a workpiece is properly connected to earth, and that the impedance of the connection is not such as will elevate dangerously the voltage on the workpiece. The objective of the invention is to solve this problem, an objective met by an earth connection for workplaces that comprises a loop in the connection of the workpiece to earth, the loop being connected at each end to and being completed by the workpiece, and there being a sensor means to sense current flowing in the loop above a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.