Fuel injector having valve stack with vented back-up plate for check seal retention
US10473073B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2018 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | May 9, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector includes a valve stack forming a seal cavity, and an outlet check extending through the seal cavity. A check seal is positioned within the seal cavity and seals about the outlet check. The valve stack also includes a back-up plate trapping the check seal within the seal cavity, such that a crevice is formed within the seal cavity between the check seal and the back-up plate. The back-up plate has a vent formed therein that fluidly connects the crevice to a drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.