Filter media configuration

Details Filter media configuration Filter media configuration

1999-04-20

2001-03-20

Simmons, David A. (Department: 1724)

Gas separation

Two or more separators

Spaced for parallel flow of gas

C055S486000, C055S489000, C055S500000, C055S511000, C055S525000, C055S528000, C055SDIG003

Reexamination Certificate

active

06203592

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a filter media configuration useful in filtering a fluid, such as, for example, air or a gas in order to remove particulates and other impurities therefrom. More particularly, such a filter media configuration has air filtering systems used to remove contaminants from vehicular cabin air or from air in other enclosures.
BACKGROUND OF THE INVENTION
It has become increasingly desirable and, in some situations necessary, to filter air streams such as air streams which provide “cabin air” for vehicular passenger compartments. This is because vehicles tend to operate in environments which are frequently heavily polluted by emissions from other vehicles traveling on the same roadway, which emissions include a host of injurious gases, vapors and particles. This is not only the case for urban roads, but also for rural roads where pollen and dust are frequently drawn onto roadways by moving vehicles and then pulled into passenger compartments.
Filtering inlet air for vehicular cabins is a relatively new practice in which the technology is now developing and thus, there is a need for concepts which are of particular interest with respect to this technology. The concepts developed to improve the quality of cabin air also may have application for treating air streams in general and specifically, for cleaning combustion air prior to the air entering an internal combustion engine.
SUMMARY OF THE INVENTION
In view of the aforementioned considerations, it is a feature of the present invention to provide a new and improved filter media configuration which is especially useful to clean cabin air for vehicles but which may have other uses such as, for example, removing particulates from air streams used for various purposes such as, for example, but not limited to, air for other living or industrial enclosures or for combustion air used in internal combustion engines.
In view of these features and other features, the present invention is directed to a filter media configuration for a filter element having a frame wherein the filter media filters a stream of gas moving transversely with respect to an opening in the frame in which the filter media is disposed in order to remove particulates from the stream. The filter media comprises an array of filter media panel members having upstream and downstream filter media faces defined within first and second ends and upstream and downstream edges. The filter media panel members are supported in the frame at an angle with respect to the air stream and with a spacing sufficient to overlap upstream edges of filter media panels with the downstream edges of adjacent filter media panel members, whereby air impinging on one filter media panel member and passing therethrough in the direction of the air stream impinges on, and passes through, another filter media panel member before exiting the filter media. In a further aspect, the filter media includes a secondary filter media component disposed downstream of the array of filter media panels.
In a further aspect of the invention, each of the filter media panel members comprises a folded over web of a pleated filter media material, the web being continuously pleated over its length into a plurality of pleats.
In an additional aspect, the filter media panels are oriented at an angle of about 45° with respect to the direction of the air stream.
In a further aspect of the invention, the filter media is incorporated in a filter element which includes a frame that provides the supports to orient the filter media panels at an angle with respect to the air stream as well as a support for the secondary filter media.


REFERENCES:
patent: 1841250 (1932-01-01), Merryweather
patent: 2130107 (1938-09-01), Somers
patent: 2130806 (1938-09-01), Link
patent: 2286479 (1942-06-01), Farr
patent: 2567030 (1951-09-01), Schaaf
patent: 2764257 (1956-09-01), Brixius
patent: 3871849 (1975-03-01), Smith et al.
patent: 4334899 (1982-06-01), McConnell

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