Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1988-06-27
1989-06-20
Michalsky, Gerald A.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
13759617, 2511292, 303119, F15B 13044
Patent
active
048401935
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 simultaneously closed.
REFERENCES:
patent: 2336887 (1943-12-01), Piron
patent: 3064670 (1962-11-01), Peras
patent: 3854501 (1974-12-01), Machek
patent: 4077674 (1978-03-01), Doto
Alfred Teves GmbH
Michalsky Gerald A.
Raden James B.
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