Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1995-10-12
1997-08-05
Lee, Kevin
Valves and valve actuation
Electrically actuated valve
Including solenoid
25112917, 251331, 13762544, F16K 3106, F16K 1102
Patent
active
056534221
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a solenoid valve with an oblong cuboid valve housing, in which two seal seats and an oblong chamber are formed, with a bar-shaped armature which is accommodated in the chamber and is preloaded in one of two switching positions by means of a return spring, and with a solenoid unit which is joined to the valve housing on the side of the housing opposite the seal seats, with the armature having a blunt edge on the side facing the solenoid unit and being pivotally mounted.
A solenoid valve of this design is known from the German utility model specification 73 24 333. The armature of this solenoid valve is pivotally mounted on a lip. The return spring, which is designed as a simple spiral spring, engages one of the two ends of the armature and pushes said end away from the floor of the valve housing, with the neighbouring seal being lifted from its seal seat and the second seal being pressed against its seal seat at the opposite end of the armature. Both seals are integrated in a diaphragm, through which the valve chamber is separated from the chamber neighbouring the solenoid valve, in which chamber the armature is located.
This known solenoid valve is well suited to compact, narrow designs. There are, however, limits to further miniaturisation, since the lip mounting of the armature becomes problematic in small dimensions as far as installation and manufacturing tolerances are concerned.
Through the invention a solenoid valve is provided allowing further miniaturisation and very narrow designs, since it consists of few individual parts, which are easy to manufacture, and permits simple and if required automatic mounting as well as easy maintenance, since the need for adjustment work is obviated.
The solenoid valve in accordance with the invention is characterised by the armature being inserted movably in the chamber of the valve housing and being mounted with its blunt edge on an even supporting area without position stabilisation; the return spring engages in a recess in the armature on the side of the armature opposite the seal seat and is stabilised in position on the valve housing. The armature thus does not have a pivoted axis fixed in space, but is only supported with its blunt edge on the even supporting area; the position of the pivoted axis of the armature in the plane of the supporting area results without constrained action due to the equilibrium which occurs automatically between all involved supporting and frictional forces induced by the strength of the return spring.
To ensure that the armature does not move out of its functional position due to the effect of hard knocks, the armature is closely surrounded by the internal walls of the chamber of the valve housing, and only has enough distance from these to be able to move freely. Under the effects of knocks or vibrations, the internal walls of the chamber thus act as stop faces for the armature.
In the preferred embodiment, one of the two seals is also located in the recess in the armature; this works together with a seal seat opposite, which is located at the end of a nozzle projecting into the valve chamber. The return spring, which is designed as a simple spiral spring, encompasses the nozzle and is fixed in position by this on the floor of the valve chamber.
If necessary, a second seal is also located in a recess in the armature; this seal is located on the side facing away from the first seal opposite the appropriate seal seat, which is also formed at the end of a nozzle projecting into the valve chamber.
The solenoid valve is very suitable for advanced miniaturisation, since it consists of few individual parts. These are easy to manufacture due to their simple form. The armature is a drive element and an actuating element at the same time, and represents the only moving part. It carries the seals and is inserted movably, without fixed articulation or bearing, in the chamber of the valve housing. An unfavourable summation of manufacturing tolerances is also avoided through the small number of individual parts. To a
REFERENCES:
patent: 4446889 (1984-05-01), Sakakibara et al.
patent: 5040567 (1991-08-01), Nestler et al.
patent: 5139226 (1992-08-01), Baldwin et al.
patent: 5265843 (1993-11-01), Kleinhappl
Pieloth Manfred
Schrepel Dieter
Topfer Heinz
Burkert Werke GmbH & Co.
Cole Thomas W.
Ferguson Jr. Gerald J.
Lee Kevin
LandOfFree
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 Solenoid valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solenoid valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1069514