Electric motor commutator secured to rotor by confined epoxy
US4977343A · kind A · utility
5Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Oct 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor in an electric motor comprises a shaft having a commutator and armature thereon. To prevent relative movement between the armature lamination stack and the commutator, a structural coating such as epoxy resin coats the shaft between the commutator and stack. The commutator base has a coaxial recess in the adjacent end. The base is urged towards the stack while the coating is still fluid to gather up the coating so that it is of substantial thickness on the shaft, at least partially filling the recess and a radial slot in the recess wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.