Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Reexamination Certificate
1999-10-27
2001-02-13
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
C137S192000
Reexamination Certificate
active
06186160
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
Priority is claimed with respect to German Application No. 198 52 156.1-43 filed in Germany on Nov. 12, 1998, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Technical Field
The invention relates to a device for drawing off gaseous and liquid media from an inflowing medium.
2. Discussion
If both liquid and gaseous media can flow in a pipe either at the same time or independently of each other, it may, in various technical fields of application, be necessary or desirable for this pipe to be separated into two separate pipes, in one of which pipes only gaseous medium may flow. Both liquid, and also to a certain extent gaseous, medium may flow in the other pipe.
A separation of this type is, for example, necessary in the refuelling of motor vehicles where an activated carbon filter is to be protected from liquid fuel constituents and therefore no liquid constituents are to enter into the pipe leading to the activated carbon filter.
According to an item of prior art which is known from practical experience, an individual valve is used for this purpose. A separate pressure relief valve is used in order to reduce excess pressures in such a refuelling system or fuel-evaporation control system of a motor vehicle.
However, the necessity of having two valves operating independently of each other here is very disadvantageous because this results in unnecessary costs. Also, the reliability of the entire refuelling system in which valves of this type are installed, and the maintainability of the said system are adversely affected.
DE 42 19 058 A1 discloses a ventilation device for oil-feed devices which have a float which floats in vigorously foaming oil by virtue of the weight of said float being partially supported on a spring element and which is provided for closing the ventilation valve and therefore prevents leakage of oil.
U.S. Pat. No. 4,269,217 discloses a separating valve which is intended to be used to separate liquids from gases. For this purpose, the valve has a plurality of flow ducts and also a washer which rises from its seat when a medium flows in.
For further prior art as regards similar devices, reference is made to GB 21 73 282 A and U.S. Pat. No. 4,082,106.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a device for drawing off gaseous and liquid media from an inflowing medium, which device is, on the one hand, very effective and reliable and, on the other hand, is cost-effective. The intention, in particular, is to ensure with the aid of such a device that only gas can flow out through an outlet thereof.
According to the invention, this object is achieved by the features mentioned in claim
1
.
Because of the separate outlet connections for liquid and gaseous media, which can in each case be opened and closed by different closing devices which are separate from one another, it is possible, in an advantageous manner, to prevent liquid which enters into the float chamber via the feed connection from being able to enter into the outlet connection for the gaseous medium. It is therefore possible to separate off the liquid medium and for only gaseous materials to be able to pass through this outlet connection, as a result of which a device behind the outlet connection can be protected from liquid.
When a corresponding pressure is reached in the float chamber, it is possible also for gaseous medium to emerge through the outlet connection for the liquid medium in addition to the liquid medium flowing out of this connection, since the closing device for closing the float chamber with respect to the outlet connection for the liquid medium also opens at an equivalent pressure. This constitutes a rapid and simple option for reducing high pressures in the feed pipe or in the float chamber. The necessary separating-off of the liquid medium and the distribution of the flow of media remain, however, unaffected by this.
In this connection, the deflecting device having the element for opening the closing device of the float chamber with respect to the outlet connection for liquid media serves to the effect that, when there is a large quantity of liquid medium flowing in and an associated floating of the floating body within the float chamber, i.e. a movement upwards, this movement is deflected downwards and the outlet connection is thereby opened, as a result of which the liquid medium can very rapidly flow out of the outlet connection provided for this purpose. The rising of the liquid level in the float chamber therefore advantageously causes rapid opening of the outlet connection and an associated emptying of the float chamber.
A further advantage of the device according to the invention is the fact that it only operates when there is inflowing liquid or when there is an excess pressure, yet is completely insensitive to negative pressure.
The overall result is a device which merely requires a housing and is therefore more favourable both with regard to the costs and also with regard to installation.
Advantageous refinements and developments of the invention emerge from the subclaims and from the exemplary embodiment which is represented in terms of principle below with reference to the drawing.
REFERENCES:
patent: 1897398 (1933-02-01), Raymond
patent: 2555452 (1951-06-01), Mclntyre
patent: 4082106 (1978-04-01), Butcher
patent: 4269217 (1981-05-01), Flanagan et al.
patent: 42 19 058 A1 (1993-01-01), None
patent: 2173282 (1986-10-01), None
Hennrich Werner
Richter Andreas
Daimler-Chrysler AG
Lorelli Marc
Michalsky Gerald A.
LandOfFree
Device for drawing off gaseous and liquid media does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for drawing off gaseous and liquid media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for drawing off gaseous and liquid media will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2558563