High fatigue strength components requiring areas of high hardness

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11584969
APP PUB NO 20200208233A1
SERIAL NO

16815579

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Metal components subject to wear or contact fatigue in a first area, and subject to bending, axial and/or torsional stress loading in a second area comprise a surface hardened, first surface layer in the first area, and a surface compressive-stress treated, second surface layer in the second area. The second surface layer has a material hardness different from, and typically lower than, the first surface layer, and induced residual compressive stress to improve fatigue strength. Example components described include a gear, a cog, a pinion, a rack, a splined shaft, a splined coupling, a torqueing tool and a nut driving tool. A hybrid manufacturing process is described, including area-selective surface hardening combined with a process to add compressive stress to fatigue failure prone areas.

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Patent Owner(s)

Patent OwnerAddress
METAL IMPROVEMENT COMPANY LLC80 ROUTE 4 EAST PARAMUS NJ 07652

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hackel, Lloyd A Livermore, US 27 580

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