Patent · US Expired

Seat heater and process for heating of a seat

US6150642A · kind A · utility

60Cited by

10References

6Claims

0Family size

Assignee

W.E.T. Automotive Systems AG · DE

Inventors

Michael Weiss · Dittelbrunn, DE
Markus Hugenschmidt · Munich, DE
Ralf Carle · Königsbrunn, DE

Key dates

Filing date	Jul 13, 1999
Grant date	Nov 21, 2000
Priority date	—
Expiry date	Jul 13, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH05B2203/037
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The seat heater includes at least one electric sheet-type heating element (10) made of flexible high-resistivity material to which the main electrodes (13A, 13B) are connected. In order to minimize the time during which the seat is perceived as being cold without any notable increase in overall power requirements, the seat heater is equipped with an additional feature (18A, 18B) for heating basically at least a partial area (SH) of the sheet-type heating element (10) with increased heating density, and a switch device for changing from heating the partial area (SH) with the additional feature (18A, 18B) to overall homogeneous heating of the sheet-type heating element (10) with regular heating density through the main electrodes (13A, 13) or the main electrodes (13A, 13B) and the additional feature (18A, 18B).

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