Magnetic air valve
US4601458A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1983 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Mar 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F3/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetically operated valve having a resilient flat-surfaced valve member cooperating with a valve seat is disclosed. The resilient member is preferably mounted on an armature in a manner to permit relative motion therebetween to allow the armature to gain a predetermined inertia prior to engaging the resilient member so as to aid in overcoming the pressure differential across the resilient member. Additionally, the electromagnet thereof acts unevenly on the armature so as to cause tilting movement thereof and a corresponding "prying" movement of the resilient member from the valve seat. The valve may be operated in the normally-opened or the normally-closed mode. In one embodiment, at least a portion of the armature is provided with a non-magnetic covering or coating, thereby forming a non-magnetic gap thereon. In another embodiment, a non-magnetic wear plate is disposed between at least a portion of the electromagnet and the armature. Such wear plate substantially prevents the armature from contacting and wearing said portion of said magnetic actuating means during the tilting movement of the armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.