Patent · US Expired

Apparatus for heating an air stream

US4687909A · kind A · utility

6Cited by

9References

9Claims

0Family size

Assignee

Bosch-Siemens Hausgeraete GmbH

Inventors

Walter Eichler · Steinheim, DE
Karlheinz Farber · Giengen an der Brenz, DE
Elisabeth Fischer · Frasdorf, DE

Key dates

Filing date	May 23, 1985
Grant date	Aug 18, 1987
Priority date	—
Expiry date	May 23, 2005

Classification

Technology area (CPC A)Human Necessities
CPC primaryA23N12/08
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An apparatus for heating an air current, includes a heating coil being heated until it glows providing radiation in a given region, a device for conducting an air current past the heating coil, an electronic heating power control device connected to the heating coil, and a control sensor connected to the control device in the form of a light radiation sensitive circuit element disposed in the given region.

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