Electromagnetically actuatable three-way/two-position directional control valve
US4840193A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87217
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is an electromagnetically actuatable three-way/two-position directional control valve for alternatively connecting an outlet port to a first or to a second inlet port. The connection is established by way of a valve chamber with which the outlet port is in direct communication. The inlet ports each communicate with the valve chamber by way of sealing seats adapted to be closed or opened by means of a movable valve closure member. At least one electromagnet whose housing accommodates a magnet coil as well as a slidably disposed armature which, when the electromagnet is excited, actuates the valve closure member by way of a valve-actuating tappet. A connection is established between the second inlet port and the outlet port in the inactive position of the valve closure member. In order to avoid a vacuum leakage during change-over, the present invention provides that the valve closure member is formed by an elastic valve member whose sealing surface is biased in the direction of the first sealing seat by means of a compression spring in the inactive position, while, during actuation, an intermediate position of the valve member is provided in which the two sealing seats are …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.