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| Number | Title | Issue Date |
| 6419876 | Machinability of powder metal components A sintered powder metal part is prepared for machining by injecting grease into the surface of the part to be machined to a depth at least equal to the depth of machining. The grease is injected under very high pressure using repressing tooling by applyin... | 07/16/2002 |
| 6190605 | Dry die wall lubrication A method for high density long fill compaction of metallic powders uses a precisely temperature controlled mold and a dry sprayed lubricant which has the characteristic of softening on contact with the mold and smearing on the mold wall during compaction,... | 02/20/2001 |
| 6148685 | Duplex sprocket/gear construction and method of making same A unitary powder metal gear or sprocket (10) has a teeth region (16) which extends 2-5 mm below the tooth root diameter and a body region (14) radially inside of the teeth region (16). The teeth region (16) is pressed to a higher density than the body reg... | 11/21/2000 |
| 6086258 | Precisely repositionable bearing cap In a bearing cap of the type which is bolted to a bearing support structure so as to define a bearing bore between the cap and the structure and in which bolt holes for securing the cap to the structure extend through feet of the cap and into the structur... | 07/11/2000 |
| 6013225 | Surface densification of machine components made by powder metallurgy A sintered powder metal part is surface densified by surface heating followed by repressing. Surface heating is preferably done to a temperature which is just below the critical temperature where the steel alloy material of the part transforms from a ferr... | 01/11/2000 |
| 5972132 | Progressive densification of powder metallurgy circular surfaces Inner or outer cylindrical worked surfaces of powder metal components are bearingized by orbiting tapered rollers against them using a tapered mandrel having points for impacting the rollers against the worked surface.... | 10/26/1999 |
| 5501529 | Bearing support insert A bearing insert for being cast into an aluminum alloy engine block is made by a ferrous powder metal sintering process to make a skeleton structure which is permeable to the molten aluminum alloy in the block casting process. The insert is made of a mate... | 03/26/1996 |
