Contact device for heavy electrical currents
US4506123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1983 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Jan 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S200/42
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electrical contact device for transmitting heavy currents between relatively rotatable parts, for example between a fixed welding transformer and a rotatable unit which supports a spot welding gun. The contact device comprises a spaced-apart pair of annular, axially fixed, contact segments on one unit and, between these, an axially displaceable pair of annular contact disks on another unit. The disks are urged towards each other by springs and are thereby centered by a centering device to provide a well-defined clearance between each contact disk and the confronting contact segment, and the disks are pressed outwardly against the co-acting contact segments, to eliminate said clearances when current is to flow therebetween, by an annular operating device. The contact device has particular utility in robotics and prevents wear at the contacting surfaces on the appearance of relative rotation therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.