Global Patent Index - EP 1038609 A1

EP 1038609 A1 2000-09-27 - METHOD OF MANUFACTURING LATCH PLATE

Title (en)

METHOD OF MANUFACTURING LATCH PLATE

Title (de)

VERFAHREN ZUR HERSTELLUNG EINER RIEGELPLATTE

Title (fr)

PROCEDE DE FABRICATION D'UNE PLAQUE DE VERROU

Publication

EP 1038609 A1 (EN)

Application

EP 99940509 A

Priority

  • JP 9904623 W
  • JP 26363798 A

Abstract (en)

A process of making a ring-shaped metal latch plate 10 having an internal ratchet teeth 20 arranged around an inner periphery thereof with the use of a punch 30 provided with a toothed forging edge 31 for shaping the internal ratchet teeth and a pilot 32 formed axially forwardly of the toothed edge. Firstly with this process, a metal plate 11 is formed to have a prepared hole 12. Then, the punch 30 is placed to register the pilot 32 with the prepared hole 12 for engaging the said toothed forging edge 31 with a peripheral portion 13 of the prepared hole 12. Thereafter, the toothed forging edge 31 is driven to extrude the peripheral portion 13 by cold-forging in order to shape the internal ratchet teeth 20 around the prepared hole. <IMAGE>

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

B21K 1/30; B21J 5/06

IPC 8 full level (invention and additional information)

B60R 22/48 (2006.01); B21J 5/06 (2006.01); B21K 1/30 (2006.01)

CPC (invention and additional information)

B21K 1/30 (2013.01)

Citation (search report)

See references of WO 0016930A1

Designated contracting state (EPC)

CH DE IT LI SE

EPO simple patent family

EP 1038609 A1 20000927; JP 2000094083 A 20000404; JP 3205730 B2 20010904; TW 452512 B 20010901; WO 0016930 A1 20000330

INPADOC legal status


2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): CH DE IT LI SE

2003-01-08 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020301

2000-09-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000516

2000-09-27 [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