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| Number | Title | Issue Date |
| 7854995 | High density dual helical gear The present invention relates to a low cost technique for manufacturing dual helical gears, such as herringbone gears, from powder metals. The dual helical gears made by this technique are of high density (greater than 92% of theoretical density) and offer superior ... | 12/21/2010 |
| 7794551 | Carburization of metal articles The present invention relates to a process for carburizing a metal article comprising: (1) heating the metal article to an elevated temperature, (2) coating the heated metal article with a graphite suspension to produce a graphite coated metal article, wherein the g... | 09/14/2010 |
| 7455711 | Process for manufacturing hardened powder metal parts The subject invention reveals a process for making hardened powder metal parts which comprises compacting a powder metal composition into a green preformed metal part and subsequently sintering said green metal part to produce the powder metal part at an elevated te... | 11/25/2008 |
| 7416696 | Powder metal materials and parts and methods of making the same Embodiments of the present invention relate to methods of forming powder metals materials and parts. More specifically, certain embodiments of the present invention relate to methods of forming powder metals materials and parts by densifying at least a portion of a ... | 08/26/2008 |
| 7364803 | High density dual helical gear and method for manufacture thereof The present invention relates to a low cost technique for manufacturing dual helical gears, such as herringbone gears, from powder metals. The dual helical gears made by this technique are of high density (greater than 92% of theoretical density) and offer superior ... | 04/29/2008 |
| 6833018 | Powder metal materials including glass A method of forming a powder metal material includes molding a compact from a powder mix comprising an iron-containing powder and glass, and subsequently sintering the compact. Also disclosed is a sintered powder metal material including iron and glass. ... | 12/21/2004 |
| 6793705 | Powder metal materials having high temperature wear and corrosion resistance A method of forming a powder metal material or article includes the steps of molding a compact from a metallurgical powder, and then sintering the compact. The metallurgical powder may include at least one of a stainless steel powder and a low-chromium steel-base po... | 09/21/2004 |
| 6630101 | Method for producing powder metal gears A method of producing a gear from a metallurgical powder includes molding at least a portion of the powder to provide a gear preform. The gear preform is sintered and hot formed, and subsequently may be carburized. The gear preform is resintered and coole... | 10/07/2003 |
| 6592809 | Method for forming powder metal gears A method for producing a fully dense powder metal helical gear including placing powder metal in a preform die wherein it can be compacted axially by punches to create a gear preform having various gear profiles such as a helical profile, sintering the pr... | 07/15/2003 |
| 6485540 | Method for producing powder metal materials A method of producing a powder metal material includes providing a metallurgical powder including at least one low alloy steel powder and 0.3 up to 1.0 weight percent carbon. At least portions of the powder are molded to provide compacts, and the compacts... | 11/26/2002 |
| 6473964 | Method of fabricating camshafts A method of attaching and adjusting first and second members includes providing a first member having an outer surface and a second member. The second member is affixed to the outer surface of the first member at a desired axial position along the length ... | 11/05/2002 |
| 6338747 | Method for producing powder metal materials A method for producing a material includes providing a metallurgical powder including iron, 1.0 to 3.5 weight percent copper, and 0.3 to 0.8 weight percent carbon. At least a portion of the powder is compressed at 20 tsi to 70 tsi to provide a compact, an... | 01/15/2002 |
| 5613180 | High density ferrous power metal alloy A method for producing high density and/or high surface density ferrous powder metal parts has the steps of: compacting a iron-containing powder substantially free of graphite at room temperature and at about 40-50 tsi; sintering the green compact in an i... | 03/18/1997 |
