Valves and valve actuation – Electrically actuated valve – Solenoid having plural coils
Reexamination Certificate
2004-03-29
2004-11-09
Hirsch, Paul J. (Department: 3754)
Valves and valve actuation
Electrically actuated valve
Solenoid having plural coils
C251S129150
Reexamination Certificate
active
06814339
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention is directed generally to a magnetic valve and more particularly to a double safety magnetic valve having two valves.
BACKGROUND OF THE INVENTION
The invention concerns a coaxial magnetic valve with an inner valve disk, which can move in the axial direction, and with an outer valve disk, which surrounds the inner valve disk and which can move in the axial direction. These two valve disks are arranged coaxially to each other and each rises from its corresponding valve seat against the action of a closing spring. The coaxial magnetic valve of the invention also has a magnetic drive for activating both valve disks.
Such a coaxial magnetic valve has become known, e.g., from DE 198 26 076 C1.
This known coaxial magnetic valve has a coil that acts on an armature connected to the inner valve disk. The outer valve disk engages behind the inner valve disk in the closing direction and is thus moved by the inner valve disk when the inner valve disk opens in the opening direction. Thus, the two valve disks can only be opened together, which means that a test of the seal of the intermediate space enclosed between both valve disks can be performed only at high technical expense.
Therefore, it would be desirable to provide a coaxial dual valve disk with the ability to control the two valve disks separately.
SUMMARY OF THE INVENTION
This problem is solved according to the invention in that the magnetic valve includes two independent magnetic loops which are arranged one above the other in the axial direction, each of which has a coil, and the magnetic loops interact with two armatures which are arranged one above the other in the axial direction and which are connected to the inner valve disk and to the outer valve disk, respectively. The armature of the outer valve disk is penetrated by a connecting rod connecting the inner valve disk to its armature.
The advantage achieved with the invention is that two valve disks arranged on a common axis can be activated independently of each other. This enables, in particular, a simple test of the seal of the intermediate space enclosed between both valve disks, as described, e.g., in DE 200 15 703 U1.
In a preferred embodiments of the invention, the outer valve disk and its armature are directly connected to each other.
Preferably, a nonmagnetic spacer is provided between the two magnetic loops to prevent one magnetic loop from affecting the other.
The two armatures can be guided in a nonmagnetic closed magnet sleeve, e.g., in a stainless steel pipe, or also in magnetic sleeves. One end of the closed magnet sleeve can be closed by the pole core for the armature of the inner valve disk and the pole core for the armature of the outer valve disk is mounted within the closed magnet sleeve, particularly forced into the sleeve, wherein the connecting rod then also penetrates the pole core for the armature of the outer valve disk. Preferably, the intermediate space between the inner and the outer valve disk is sealed by gaskets on the armature of the outer valve disk and on the connecting rod.
Additional advantages of the invention can be ascertained from the description and the drawing. Likewise, the previously mentioned features according to the invention and also those still to be described can be used individually or in arbitrary combinations. The shown and described embodiment is not to be understood as conclusive, but instead merely as an example for the description of the invention.
REFERENCES:
patent: 4546955 (1985-10-01), Beyer et al.
patent: 5218996 (1993-06-01), Schmitt-Matzon
patent: 6161813 (2000-12-01), Baumgartner et al.
patent: 1427360 (1976-03-01), None
patent: 10-196835 (1998-10-01), None
Berger Siegfried
Forster Joachim
Hirsch Paul J.
Karl Dungs GmbH & Co.
Reed Smith LLP
LandOfFree
Coaxial solenoid valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coaxial solenoid valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coaxial solenoid valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3363839