Two-stage solenoid valve
US4624282A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87507
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-stage solenoid valve uses a pair of stacked coaxial armatures in a cylindrical sleeve housing. A first armature is provided with a fluid sealing ring and is urged by a first spring to peripherally seal an adjacent internal fluid port in a valve base supporting a first end of the sleeve housing. The first armature is provided with a coaxial bore extending through the armature and coaxial with the fluid sealing ring to form a fluid channel. The second armature also has a coaxial bore extending therethrough with a resilient sealing member slideably retained within the bore. A second spring is arranged to urge the resilient sealing member against a first end of the bore in the second armature and to extend therefrom to a fixed plug in a second end of the cylindrical housing. The resilient sealing member cooperates with a fluid port defining an end of the coaxial bore in the first armature opposite the end of the first armature having the fluid sealing surface. A first and a second solenoid coil are coaxially stacked to surround the cylindrical sleeve housing adjacent to respective ones of the first and second armatures. An energization of the second coil provides a first fluid pa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.