Global Patent Index - EP 0974991 A1

EP 0974991 A1 2000-01-26 - Method to produce bimetallic contacts for electromagnet blocks for starter motors and relative bimetallic contacts

Title (en)

Method to produce bimetallic contacts for electromagnet blocks for starter motors and relative bimetallic contacts

Title (de)

Verfahren zur Herstellung von Bimetallkontakten für elektromagnetische Einheiten für Anlassmotoren

Title (fr)

Procédé de production de contacts bimétalliques pour unités électromagnétiques de moteurs de démarrage

Publication

EP 0974991 A1 (EN)

Application

EP 99113121 A

Priority

IT UD980131 A

Abstract (en)

Method to produce bimetallic contacts for electromagnet units in starter motors for internal combustion engines, the contacts including a head at least partly made of material with high electric conductivity and a shank at least partly made of material with high mechanical resistance, the method providing a first step wherein a bar is obtained made of material with high mechanical resistance (22), at one end of which a cavity (24) is made, the bar (22) being of a desired shape which does not directly resemble the final shape of the bimetallic contact, a second step wherein a cylinder (23) made of material with high electric conductivity is inserted inside the cavity (24), a third step wherein the bar (22) and the cylinder (23) are subjected to a heat treatment which causes a partial melting and mutual penetration of the two elements (22, 23) to form substantially a single body and a fourth step wherein the bar (22) with the cylinder (23) incorporated is subjected to a shaping step to obtain a desired final form of the bimetallic contact (10). <IMAGE>

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

H01H 11/04; H01H 51/06

IPC 8 full level (invention and additional information)

H01H 11/04 (2006.01); H01H 51/06 (2006.01)

CPC (invention and additional information)

H01H 11/041 (2013.01); H01H 51/065 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0974991 A1 20000126; IT UD980131 A1 20000121

INPADOC legal status


2003-08-13 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030203

2000-10-11 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-09-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000714

2000-01-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-01-26 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI