Spot welder
US4963712A · kind A · utility
4Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Aug 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/312
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A spot welder comprising a movable truck which is movable along a workpiece, and first, second and third electrodes supported on the truck. The first and second electrodes are adapted to pair with each other for series welding, and one of the first and second electrodes is adapted to pair with the third electrode for indirect welding. Depending on the state of the site of the weld, welding can be performed by selectively using either series or indirect-spot welding. Mechanisms are provided for easily and rapidly switching between the two welding types.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.