Patent · US Expired

Electric heating for motor vehicles

US6919535B2 · kind B2 · utility

9Cited by

5References

29Claims

0Family size

Assignee

Catem GmbH & Co. KG · DE

Inventors

Gunter Uhl · Waibstadt, DE
Michael Niederer · Bad Bergzabern, DE
Marc Bernhardt · Achenheim, FR
Franz Bohlender · Kandel, DE

Key dates

Filing date	Aug 25, 2003
Grant date	Jul 19, 2005
Priority date	—
Expiry date	Aug 25, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH05K2201/10446
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An electric heating device as supplemental heating for motor vehicles includes as the heating elements power transistors directly mounted on the printed circuit board. For efficient removal of the dissipation heat from the power transistors the latter are in direct contact on their underside with a cooling element via openings in the printed circuit board. In order to simplify manufacture, the cooling elements are formed in two pieces: the heat conducting disk with a small thermal mass insertable into the opening of the printed circuit board, and the cooling body which can be connected to that heat-conducting element.

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