Invention Grant
- Patent Title: Multi-piece oil scraper ring with reduced friction
-
Application No.: US17260794Application Date: 2019-05-28
-
Publication No.: US11713811B2Publication Date: 2023-08-01
- Inventor: Stephan Machliner , Sina Shahverdi , Dirk Bärenreuter
- Applicant: FEDERAL-MOGUL BURSCHEID GMBH
- Applicant Address: DE Burscheid
- Assignee: Federal-Mogul Burscheid GmbH
- Current Assignee: Federal-Mogul Burscheid GmbH
- Current Assignee Address: DE Burscheid
- Agency: Dickinson Wright PLLC
- Priority: DE 2018117198.6 2018.07.17
- International Application: PCT/EP2019/063741 2019.05.28
- International Announcement: WO2020/015897A 2020.01.23
- Date entered country: 2021-01-15
- Main IPC: F16J9/06
- IPC: F16J9/06

Abstract:
A multi-piece piston ring includes an upper scraper ring 10 comprising two flank surfaces, an outer scraping surface/edge, and an inner spring contact surface. A lower support ring 4 includes two flank surfaces, an outer spring contact surface, and a support ring inner surface. An expander spring/spiral spring 8, which, on an upper and lower side, is operational to abut against a respective lower flank surface of the upper scraper ring 10 and against the upper flank surface of the support ring 4. Scraper ring contact projections protruding upwards on an inner spring side, and support ring contact projections protruding downwards on an outer spring side, wherein the scraper ring contact projections are to each abut against the inner spring contact surface of the scraper ring 10, and support ring contact projections protruding downwards are to abut against the outer spring contact surface.
Public/Granted literature
- US20210270368A1 MULTI-PIECE OIL SCRAPER RING WITH REDUCED FRICTION Public/Granted day:2021-09-02
Information query