Wear surface sleeve press fit onto a shaft in a high temperature air valve application
US11994220B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2022 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Nov 10, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B37/186
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.