Radially notched piston rings
US9334959B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Oct 4, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/26
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an annular groove carried by one of a pair of reciprocally movable members, a piston ring is carried by the annular groove for sealing the reciprocally movable members for minimizing fluid leakage between the members. The piston ring is an annular member that includes an outer contact surface engagable with the sidewall, an opposed inner surface, an end gap that severs the annular member and that defines spaced-apart first and second ends of the annular member, and annular member tension-relieving notches formed in the inner surface of the annular member. The notches are spaced-apart along the length of the annular member between the first end and the second end, and each notch has a blunt notch tip for inhibiting crack propagation in the annular member from said blunt notch tip when the annular member is tensioned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.