US 12,285,803 B1
Method for manufacturing combination or compound gears
Kevin A. Bauer, St. Marys, PA (US); and Timothy E. Geiman, South Lyon, MI (US)
Assigned to Keystone Powdered Metal Company, St. Marys, PA (US)
Filed by Keystone Powdered Metal Company, St Marys, PA (US)
Filed on Aug. 16, 2022, as Appl. No. 17/888,977.
Claims priority of provisional application 63/233,956, filed on Aug. 17, 2021.
Int. Cl. B22F 3/24 (2006.01); B22F 3/10 (2006.01); B22F 5/08 (2006.01)
CPC B22F 3/24 (2013.01) [B22F 3/1007 (2013.01); B22F 5/085 (2013.01); B22F 2003/247 (2013.01); B22F 2201/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a combination gear or a compound gear having a larger diameter gear face and a smaller diameter gear face, said method consisting of the sequential steps of (1) molding a powder metal composition into a green preform having the smaller diameter gear face and a larger diameter cylindrical blank face, wherein the powder metal composition is molded into the green preform under a pressure which is within the range of 40 tsi to 70 tsi, (2) subsequently machining the larger diameter cylindrical blank face of the green preform into the larger diameter gear face, and (3) subsequently sintering the green preform having the larger diameter gear face to form the combination gear or the compound gear.