Pilot valve
US5628491A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0641
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pilot valve for controlling a pneumatically actuated main valve of a milking-system pulsator, has an electromagnet that it is alternately energized and de-energized displacing an armature back and forth between each end of a stroke. At one end, the armature seals an air-supply line and at the other end a vacuumizing line. The lines are accordingly alternately connected to a valve chamber, and the valve chamber communicates with the main valve through a control channel. The armature is connected to a diaphragm so as to provide axial guidance for the armature without friction. The diaphragm is made of resilient material and is interposed between the armature and the electromagnet such that, when the armature is at one end of its stroke, it seals off the air-supply line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.