Patent · US Expired

Electric radiant heating element

US5153413A · kind A · utility

4Cited by

5References

27Claims

0Family size

Assignee

E.G.O. Elektro-Gerate Blanc u. Fischer · DE

Inventor

Eugen Wilde · Knittlingen, DE

Key dates

Filing date	Jul 12, 1991
Grant date	Oct 6, 1992
Priority date	—
Expiry date	Jul 12, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH05B2203/016
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A radiant heating element (11) contains on the surface (16) of an insulating support (14) heating resistors (18), which emanate from terminals (20), which are arranged in regular spacings on the outer circumference of the heating area (21) and are connected there to semicircular ring circuits (22, 23). The heating resistors run from the outside to the inside in nested double spirals (30, 31), reverse there in return bends (32) and then run parallel back again to the outside. This gives a very uniform, almost completely symmetrical arrangement, so that the glowing state is rapidly reached and a uniform glow pattern is obtained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.