Leak proof solenoid valve with completely covered bobbin for controlling fuel emission
US11383596B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2018 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Oct 10, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2025/0845
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A leak proof, completely sealed solenoid valve, comprising a housing 14 having a fluid flow path controlled via an electrically operated mechanism to control a flow; the mechanism comprises metallic coil 20 coiled around a bobbin 16 supported by a magnetic bracket 24 with terminal pins 18 connected to the bobbin 16 for receiving electrical input to facilitate an energized and de-energized state to control the movement of a poppet 34 shaft that obstructs the flow; wherein, the bobbin 16 comprises micro-melting fins, thereby housing over molding creates strong bond between two materials; a permanent weld is created between the bobbin 16 and the housing 14 to prevent internal leakage; and the completely sealed solenoid valve limits emissions and evaporations of the volatile fuel components into and from the valve, and contribute to reliability and robustness of the product by completely sealing the nozzle and housing using laser welding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.