Single turn induction heating coil
US5874713A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Jul 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A single turn induction heating coil provides a varied magnetic flux density for heating a portion of a load having a thermally and magnetically responsive sealant and tubing. The varied interior diameter of the cylindrical coil structure increases the magnetic flux density at the open ends of the coil or wherever desired, causing the ends of the magnetically responsive materials contained within the coil to be heated at a rate comparable to the middle portion of the coil. Consequently, the sealant and tubing recover faster and more uniformly avoiding the high incidence of tubing "flare up" or "flip back" common with typical single or multi-turn induction coil heaters. In the preferred application, heating produces a complete fluid block in a cable load section within the coil without overheating or damaging the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.