Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate
1999-09-10
2001-10-30
Smith, Duane (Department: 1724)
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
C055S320000, C055S417000, C055S482000, C123S19800E
Reexamination Certificate
active
06309436
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a device for separating liquid particles from a gas stream, in particular an oil vapor separator in accordance with the preamble to the main claim.
The fact that such filter inserts are directed into the flow path of a gas stream and get caught on the stationary structures of the filter inserts in the process, for example on the filaments of a non-woven fabric and liquid droplets which trickle into a collection chamber and then can be removed from there or can be redirected into a liquid circulation system is known from GB 988 692, for example. It is important for many types of applications, such as for a device in the suctioning tract of an internal combustion engine for a motor vehicle, that a higher degree of separation be attained at a lower loss of pressure in the flow path, without the need for combining a large number of additional aggregates in a manner that demands a great deal of space.
For example, that a pressure control valve is connected into a suctioning path is a known fact from DE-40 22 129 C2 (corresponding to U.S. Pat. No. 5,090,393). This pressure control valve is built into an air exhaust pipe between the engine crankcase and the suctioning pipe or the air filter in a motor vehicle by means of two flanges, for example.
SUMMARY OF THE INVENTION
The basis of the task of the invention is to develop a device for separating liquid particles from a gas stream in accordance with the preamble to the main claim in a simple manner, such that a compact module can be constructed in which a high level of separation is reliably ensured under ideal pressure conditions. The inventive device for separating liquid particles from a gas steam, in particular as an oil vapor separator, solves the task assigned with the characteristics indicated in the distinguishing features of the main claim.
The inventive device is particularly advantageous because a compact arrangement as well as a cyclone for the first crude separation of liquid particles and a subsequent filter insert for other, finer levels of separation in connection with a pressure control valve, which is located directly on the filter insert in a universal housing and which ensures an ideal rate of flow of the gas stream in a structurally simple manner.
In order to separate the liquid particles as completely as possible, it is important that the rate of flow of the gas particularly correspond with the permeability conditions of the filter inserts so that the liquid condensation form are not entrained once again via an overly-high rate of streaming gas. The size of the droplets forming also plays a role in relation with the fiber structure of the filter insert in this connection.
The inventive device is particularly advantageous in accordance with an embodiment of a sub-claim with a multi-layered filter insert. A crude separation and a fine separation can be undertaken in this connection with different layers of the filter insert, for example with a relatively narrow fiber structure and a relatively coarse fiber structure. The fine-tuning of the rate of flow necessary for this is feasible in a simple manner by means of the pressure control valve which is located immediately thereafter in the direction of flow. The rate of flow is accordingly optimized such that droplets of a certain size, determined by the fiber structure, are no longer entrained into the gas stream, as a result of which the separation effect would be diminished.
Other advantageous embodiments are stated in the other sub-claims.
REFERENCES:
patent: 2387368 (1945-10-01), Vokes
patent: 3320727 (1967-05-01), Farley et al.
patent: 3494114 (1970-02-01), Nelson et al.
patent: 3925044 (1975-12-01), Tu et al.
patent: 4087263 (1978-05-01), Schönmann, Jr.
patent: 4491460 (1985-01-01), Tokar
patent: 4516994 (1985-05-01), Kocher
patent: 4813385 (1989-03-01), Yamaguchi et al.
patent: 4946483 (1990-08-01), Coral
patent: 4947806 (1990-08-01), Speer et al.
patent: 4957520 (1990-09-01), Parmentier
patent: 5090393 (1992-02-01), Holch
patent: 5364456 (1994-11-01), Kahlbaugh et al.
patent: 5480464 (1996-01-01), DeVilliers et al.
patent: 5779745 (1998-07-01), Kilström
patent: 37 35 913 (1988-11-01), None
patent: 730 086 (1996-09-01), None
patent: 2 572 305 (1986-05-01), None
Crowell & Moring LLP
Filterwerk Mann & Hummel GmbH
Greene Jason M.
Smith Duane
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