Method of making an electromagnetic coupling disc
US4891077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49075
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of forming slots in the metal coupling disc (e.g., the armature or rotor) of an electomagnetic coupling such as a clutch or brake. The method is carried out by effecting relative movement between the coupling disc and a laser beam to cause the beam to melt portions of the disc and thereby form slots through the disc. The laser beam is defocused relative to the disc in order to enable a relatively low powered laser beam to form relatively wide slots in the disc. A pressurized jet of gas is directed against the disc immediately adjacent the beam and acts to blast metal from the slots and assist in the formation of wide slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.