Drive unit for flexshaft vibrators
US4384224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Sep 21, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive motor for a flexible drive shaft of an internal vibrator or some other device potentially the source of an electrical shock features a cylindrical structure embodying a field assembly which slip fits in a cylindrical shell which embodies positioning means to which the field assembly and electrically connected commutator brush means may be releasably fixed. Slip fit as a unit into this shell is an armature assembly including a commutator means fixedly mounted directly to and about shaft means intermediate its ends. One end portion of the shaft means provides an electrically non-conductive coupling device for drivingly relating the shaft means to a device which must be powered. The shaft means has affixed thereto the inner races of bearing means to either end of the armature assembly the outer races of which are in direct contact with and protected by electrically non-conductive material forming part of end covers for said cylindrical shell. The end covers are slotted and fan blade means are fixed directly to said shaft means to produce a cooling flow of air about the drive unit components. The drive unit also embodies rubber, electrically non-conductive, motor mounts ring-sh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.