Hollow shaft bore heater assembly
US4200784A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1977 |
| Grant date | Apr 29, 1980 |
| Priority date | — |
| Expiry date | Dec 5, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D25/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hollow, rotatable shaft bore heater assembly for heating a shaft from its inside to its outside. Rapid rotatable shaft heating is provided by a plurality of electrical heaters situated in slots formed on the inner surfaces of a plurality of foundation members which are insertable in the hollow shaft and are biased thereagainst by biasing structure. When assembled, the foundation members constitute a substantially cylindrical structure which has the slots formed on its inner surface and the electrical heaters are restrained within those axially extending and circumferentially separated slots by insulation disposed on the inner surface of the foundation members across the slots open mouths. The biasing structure provides biasing force between circumferentially adjacent foundation members so as to maintain contact between the shaft and foundation members during non-rotation of the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.