Solenoid valve
US5117869A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Mar 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86622
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A three position solenoid operated spool type cartridge valve includes a pair of solenoids acting on a valve assembly. The valve assembly comprises a valve sleeve having a valve chamber with a plurality of ports and an outlet. A valve spool is slidably mounted in the valve chamber for controlling flow between the ports. The two solenoid coils are removably mounted in concentrically surrounding relationship to a tube assembly. The tube assembly includes a tube end portion with a convave outer end bore. A sleeve is welded to the tube end portion at the outer end. A plunger armature is slidably received in the sleeve between the tube end portion and a tube stop adapter having a concave inner end. The tube stop adapter includes a central axial bore connected to the concave inner end with the bore being enlarged at an outer end. A rod extends through the tube stop adapter bore and includes one end secured to the armature and the other end being secured to the valve spool. A coil spring is contained within the enlarged bore between a shoulder therein and the valve sleeve. The axial distance between the armature and the outer end of the rod is selected so that when the valve is assembled …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.