Piston ring and booster pump
US12281709B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 15, 2022 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Jun 15, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2015/081
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Provided is a piston ring including: a low-pressure side ring; and a high-pressure side ring, the low-pressure side ring and the high-pressure side ring are arranged stacked in a direction along the axis so that the high-pressure side ring is closer to a fluid to be compressed, a low-pressure side rotation restriction part configured to restrict rotation in the circumferential direction relative to the piston is formed to the low-pressure side ring, a high-pressure side rotation restriction part configured to restrict rotation in the circumferential direction relative to the piston and a low-pressure side protrusion protruding toward the low-pressure side ring and inserted in the low-pressure side abutment are formed to the high-pressure side ring, and the low-pressure side protrusion is inserted in a low-pressure side abutment with clearances being provided in both sides in the circumferential direction between the low-pressure side ring and the low-pressure side protrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.