Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1995-03-23
1998-10-06
Michalsky, Gerald A.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137442, F16K 2404, F16K 3118
Patent
active
058162828
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a ventilation device in a housing, which can be connected with a fluid system to be ventilated. The device has float movable within the housing and controlling a valve through an operating device intended to control a ventilation process.
BACKGROUND OF THE INVENTION
Until this time, ventilation devices have been known to experts in the art in a number of different embodiments. A fluid system is normally closed off or sealed off from the outside, and is under pressure. If a gas (especially air) is separated from a liquid, the liquid level in the housing of the ventilation device connected to the liquid system drops, and thus, the float also drops. The valve of the ventilation device is then operated by means of the operating device to open the valve. All of the accumulated gas can dissipate through the opened valve. A disturbance-free operation of the fluid system can be obtained. The system can be a filter element or a filter system.
For control of the valve for a ventilation procedure, the known ventilation devices (e.g., as disclosed in German Patent No. 33 27 846 A1) generally have a complicated lever arrangement serving as operating device. The lever arrangement is inclined to break down and undergo difficulty in operation, and is expensive to manufacture when incorporated into known constructions. Another basic drawback of these known ventilation devices residing in the aforementioned lever arrangement is that, at high pressures, which can be up to 350 bar, the mechanical constrictions cannot operate the valve piston or the closing mechanism for a ventilating process against these high pressures.
Because of mechanically working structure, remote monitoring of known ventilation devices is generally hardly possible even at appreciable cost. In Japanese Patent No. 58-34279 A, remote monitoring in an air ventilation or exhaust device of the position of a float connected with a lever arrangement can be accomplished by means of a permanent magnet located in the float and by using a switch operable by the magnet. This position monitoring however is not coordinated with action of the mechanical operating device in the form of the known lever arrangement. The lever arrangement, dependent upon the position of the float, opens or closes a ventilation passage provided in the housing. As far as that feature is concerned, this known ventilation device has the same obvious drawbacks already described.
SUMMARY OF THE INVENTION
Objects of the present invention are to provide a ventilation device which can be free of disturbance in operation, can be manufactured at low cost, can be used under very high pressures and can be monitored in its operation from a remote point.
The foregoing objects are basically obtained by a ventilation device comprising a housing having coupling means for connecting the housing to a fluid system to be ventilated, a float movably mount-d in the housing, a float switch mounted in the housing and operatively coupled to the float for actuation by the float, and a ventilation passage in the housing. A valve is movably mounted in the ventilation passage to open and close the ventilation passage. Operating means, in the housing, controls movement of the valve between open and closed settings. The operating means includes an operating magnet with an exciter coil operatively connected to the float switch such that the switch controls activation and deactivation of the coil and with a switching part for moving the valve.
Because the operating device has an operating magnet with the exciter coil controlled electrically through a switch which is in turn controlled by the float, the operating magnet with its switching part operates the valve opening. The use of a costly and easily disrupted power transmission mechanism is avoided. Moreover, the electrically controlled operating magnet can be used at low cost with a minimum of electrical structural parts for a securely operable switching process. Therefore, considerable switching power can be
REFERENCES:
patent: 3195557 (1965-07-01), Young et al.
patent: 4444217 (1984-04-01), Cummings et al.
patent: 4509716 (1985-04-01), Barber et al.
Hornung Dieter
Lauer Victor H.
Marettek Andreas
HYDAC Filtertechnik GmbH
Michalsky Gerald A.
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