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Class Information
Number: 29/888.452
Name: Metal working > Method of mechanical manufacture > Prime mover or fluid pump making > Poppet or i.c. engine valve or valve seat making > Composite or hollow valve stem or head making > Including extruding
Description: Process wherein the manufactured article is shaped by forcing solid material, such as metal, through the orifice of a die to produce a continuously formed piece.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6779267 |
Method for increasing the wear-resistance of a work piece |
Aug. 24, 2004 |
| 6009843 |
Fiber reinforced, titanium composite engine valve |
Jan. 4, 2000 |
| 5738060 |
Poppet valve and method of making the poppet valve |
Apr. 14, 1998 |
| 5425821 |
Iron aluminum based engine intake valves and its manufacturing method |
Jun. 20, 1995 |
| 5328527 |
Iron aluminum based engine intake valves and method of making thereof |
Jul. 12, 1994 |
| 5257453 |
Process for making exhaust valves |
Nov. 2, 1993 |
| 5076866 |
Heat resistant slide member for internal combustion engine |
Dec. 31, 1991 |
| 5056219 |
Method of manufacturing hollow engine valve |
Oct. 15, 1991 |
| 5054195 |
Process for the production of a valve |
Oct. 8, 1991 |
| 4926534 |
Method for manufacturing a poppet valve head |
May. 22, 1990 |
| 4190941 |
Method of making cooled valves for internal combustion engines and valves obtained thereby |
Mar. 4, 1980 |
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