Wear surface sleeve press fit onto a shaft in a high temperature air valve application

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United States of America Patent

PATENT NO 11994220
APP PUB NO 20240159317A1
SERIAL NO

17984813

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Air valves, such as wastegates, utilize a shaft that rotates within a bushing system. Conventional deposition processes limit the thickness of the wear material between the shaft and bushing system. Accordingly, embodiments disclosed herein utilize one or more coating sleeves that are press-fit onto the shaft. This enables a thicker layer of wear material to be applied to the shaft, thereby improving the longevity and durability of the air valve, while also simplifying the manufacturing process. Embodiments may also utilize one or more anti-rotation features, such as a dowel or axial protrusion, and/or may utilize snap ring(s) to prevent axial sliding of the coating sleeve(s).

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Patent Owner(s)

Patent OwnerAddress
CATERPILLAR INC100 NE ADAMS STREET PEORIA IL 61629-9510

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ferguson, Eric Cottage Grove, US 12 228
Lawrence, Rodney Allen Frankfort, US 14 6
Stack, Brandyn Lafayette, US 3 1

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