Heater cable having a tapered profile
US10863588B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2019 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Jun 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A self-regulating heater cable includes a PTC core formed of positive temperature coefficient material and disposed in electrical contact with at least two bus wires. The PTC core may encapsulate the bus wires and space the bus wires apart a predetermined distance via a connecting portion of the PTC core. The connecting portion has a tapered profile, and is thinner at the ends approximate the bus wires and thicker in a portion between the ends, which portion may be toward or at the center of the connecting portion. The thicknesses of the ends and the thicker portion are selected to produce a ratio that is within a range at which the heater cable produces heat at its outer surface with a substantially uniform profile, and primary heat generation of the heater cable has not shifted from the center of the connecting portion to the ends of the connecting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.