Piston ring
US10648561B2 · kind B2 · utility
0Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2018 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | May 21, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Piston rings are disclosed that relate to seal performance in piston containing machines such as piston driven engines. The piston rings may include a piston ring contact side for contact with a cylinder wall in which the piston ring contact side has multiple cavities configured on alternating edges of the piston ring contact side. Certain examples of these piston rings have cavities with an average depth that is less than 1/300th of the piston ring width and which collectively occupy a cavity area percentage of the piston ring contact side that is between 20% and 30% of the total area of the piston ring contact side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.