EP 0781612 A1 19970702 - Electrode in an electric gathering apparatus
Title (en)
Electrode in an electric gathering apparatus
Title (de)
Elektrode für elektrisches Stauchgerät
Title (fr)
Electrode pour appareil de refoulement électrique
Publication
Application
Priority
- EP 95120709 A 19951229
- JP 16497894 A 19940718
Abstract (en)
In a conductive plate of an upper electrode (4) of an electric gathering apparatus (A) for manufacturing a poppet valve used in an internal combustion engine, there is formed a polygonal bore (20) in which a drive shaft (15) is engaged. An annular cut-away portion (21) which is larger than the engagement bore (20) in diameter is formed, thereby preventing a burr (17,23) and increasing durability of the electrode. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
H05B 6/56 (2006.01); B21J 1/04 (2006.01); B21J 1/06 (2006.01); B21J 9/08 (2006.01); B21K 1/20 (2006.01); B21K 1/22 (2006.01)
CPC (source: EP)
Citation (search report)
- [A] GB 2024310 A 19800109 - INGERSOLL RAND CO
- [A] DE 3538950 A1 19860605 - BARMAG BARMER MASCHF [DE]
- [A] US 3242695 A 19660329 - ROSS JR PETER M
- [A] US 5153547 A 19921006 - MAMIYA YASUNORI [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 009, no. 297 (M - 432) 25 November 1985 (1985-11-25)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 95120709 A 19951229; JP 16497894 A 19940718