Global Patent Index - EP 1023209 A1

EP 1023209 A1 2000-08-02 - AN ELECTRICALLY HEATED WIPER BLADE

Title (en)

AN ELECTRICALLY HEATED WIPER BLADE

Title (de)

ELEKTRISCH BEHEIZTER SCHEIBENWISCHER

Title (fr)

BALAIS D'ESSUIE-GLACES CHAUFFES ELECTRIQUEMENT

Publication

EP 1023209 A1 (EN)

Application

EP 98948041 A

Priority

  • SE 9801806 W
  • SE 9703783 A

Abstract (en)

[origin: WO9920499A1] At low temperatures, it is desirable to be able to heat up a wiper blade in windscreen wipers on a vehicle so as to prevent ice formation on the wiper blades and the windscreen. Within the wiper blade, there is disposed an elongate heating device (4) in thermal contact with the profile (1) of the wiper blade. The heating device (4) extends along the entire wiper profile (1) and is connected to a current source. The heating device (4) includes a temperature sensor (9, 16) which extends substantially along the entire heating device (4) and which is connected to the current source. The material in the temperature sensor (9, 16) has a temperature-dependent resistivity. Suitably, this material is a so-called NTC material, whose resistivity falls when the temperature rises. The current source includes a regulator for regulating the current supply to the heating device (4) in response to the temperature which is registered in the temperature sensor (9). In one embodiment, the NTC material (9, 16) is disposed hose-shaped about a central conductor (8), while an element wire (10) is helically wound around the NTC material. The temperature sensor, i.e. the NTC material, is connected to the regulator at the conductor (8) and the element wire (10).

IPC 1-7 (main, further and additional classification)

B60S 1/38

IPC 8 full level (invention and additional information)

B60S 1/38 (2006.01)

CPC (invention and additional information)

B60S 1/3805 (2013.01)

Citation (search report)

See references of WO 9920499A1

Designated contracting state (EPC)

AT BE CH DE DK FI FR GB IE IT LI NL

EPO simple patent family

WO 9920499 A1 19990429; AU 9470098 A 19990510; CA 2306100 A1 19990429; EP 1023209 A1 20000802; NO 20001766 A 20000608; NO 20001766 D0 20000405; PL 339942 A1 20010115; SE 513090 C2 20000703; SE 9703783 D0 19971016; SE 9703783 L 19990417

INPADOC legal status


2004-11-10 [R18D] EP-APPLICATION DEEMED TO BE WITHDRAWN: (CORRECTION)

- Effective date: 20040504

2004-11-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040511

2000-08-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000516

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK FI FR GB IE IT LI NL