Positive sealing proportional control valve with sealable vent valve
US10331145B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2017 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Aug 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D16/2097
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The proportional control valve for a fuel pump has a metering assembly within a tightly fit bore and a vent valve. The metering assembly includes a metering piston assembly, a piston biasing spring, an armature and a vent valve. The vent valve, such as a ball, is affixed to the armature and the metering piston assembly is configured around the vent valve in a manner that couples the metering piston to the armature. The metering piston assembly comprises a metering piston and a vent valve seat, permanently joined together, which contain a seal and a seat surface respectively between which the vent valve is permitted to move during the operation of the proportional control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.