Method of making an electromagnetic coupling disc
US4818840A · kind A · utility
24Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Dec 14, 2007 |
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 coupling disc (e.g., the armature or rotor) of an electromagnetic coupling such as a clutch or brake. The method is carried out by effecting relative movement between the coupling disc and a laser beam in such a manner as to cause the beam to trace the perimeter of the slot to be formed and to cut a slug of material from the disc. Also disclosed are coupling discs in which opposing side walls of the slots converge toward one another and in which the side walls are concentric but obliquely inclined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.