Ceramic heater
US4502430A · kind A · utility
18Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Nov 7, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/027
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A ceramic heater including a ceramic insulator having a circular cross section, and a heating coil having an oval cross section, embedded in the insulator along the length thereof, and bent in a U-shaped form with the bend adjacent one end of the insulator. One of a pair of parallel coil portions defining the U-shaped coil has a long cross sectional diameter lying parallel to that of the other coil portion. The diameter of a cylinder defined by the outer surfaces of the coil portions and the outside diameter of the insulator have a ratio of 35:100 to 70:100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.