Patent · US Active

Surface densification of powder metal bearing caps

US7287907B2 · kind B2 · utility

2Cited by

8References

9Claims

0Family size

Assignee

GKN Sinter Metals, LLC · DE

Inventors

Joel H. Mandel · Hartford, US
Donald J. Phillips · Menomonee Falls, US
Terry M. Cadle · Wauwatosa, US

Key dates

Filing date	Jan 29, 2007
Grant date	Oct 30, 2007
Priority date	—
Expiry date	Jan 29, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/479
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A high performance main bearing cap has particular surfaces densified for improved fatigue crack resistance. The surfaces densified are the bolted face inside of a perimetral margin and outside of bolt head interface areas around the main bolt holes, the surfaces of the main bolt holes and the side bolt hole threads. Preferred methods of densification are single needle programmable pattern peening of the bolted face peened area, over-burnishing of the bolt holes, and forming the threads rather than cutting them for the side bolt threads.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.