Cartridge heater
US4763102A · kind A · utility
8Cited by
12References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Jan 29, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical cartridge heater includes a flat rectangular core of mica. A resistance wire is helically wound around the mica core. A cover sheet of mica is placed on one face of the wound core so that a return wire extends back without shorting against the other wires. The mica core is received in recesses in head and slug end bushings to position the element centrally within a cylindrical shell. A granular fill surrounds the core and heating element within the shell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.