Gas separation: apparatus – Solid sorbent apparatus – Plural diverse separating means
Reexamination Certificate
2000-01-26
2001-10-30
Spitzer, Robert H. (Department: 1724)
Gas separation: apparatus
Solid sorbent apparatus
Plural diverse separating means
C096S154000, C055S385300, C055S486000
Reexamination Certificate
active
06309451
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an air filtering device, more particularly to an air filtering device for an automobile.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional air filter
1
for an automobile is shown to include an air inlet
10
and an air outlet
11
. A connecting tube
12
interconnects the air outlet
11
and a cylinder
13
. An air filtering member
14
is disposed in the air filter
1
. The air filtering member
14
is made of a sponge material and/or a pelletized activated carbon material. As such, when air flows through the conventional air filter
1
into the cylinder
13
via the connecting tube
12
, the impurities in the air can be removed by the air filtering member
14
to obtain clean air that is in turn mixed with fuel in the cylinder
13
.
However, the conventional air filter
1
suffers from the following disadvantages:
1. The air-flowing speed in the air filter
1
will be reduced by the air filtering member
14
. Therefore, the filtered air cannot be quickly supplied to the cylinder
13
, thus resulting in a poor fuel burning efficiency in the cylinder
13
.
2. Only a part of the impurities in the air is removed by the air filtering member
14
. The filtering effect of the air filtering member
14
is not satisfactory.
3. Since the impurities in the air are not completely removed by the air filtering member
14
, the fuel in the cylinder
13
can not be burned completely, thereby producing harmful gases that exit subsequently from the cylinder
13
and that pollute the air.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an air filtering device which can overcome the disadvantages that are commonly associated with the aforementioned conventional air filter for an automobile.
According to one aspect of the present invention, an air filtering device comprises an inner seat member, an outer seat member, and a multi-layer filter medium. The inner seat member has opposed first and second sides and a plurality of first air passages extending therethrough from the first side to the second side. The outer seat member has opposed third and fourth sides and a plurality of second air passages extending therethrough from the third side to the fourth side. The multi-layer filter medium is sandwiched between the second side of the inner seat member and the third side of the outer seat member. The multi-layer filter medium has a polypropylene fabric layer, a far-infrared radiation material layer, and an activated carbon fiber layer connected to one another. The first air passages are registered with the second air passages.
According to another aspect of the present invention, an air filtering device comprises a molded inner seat member, a molded outer seat member, and a multi-layer filter medium. The inner seat member has opposed first and second sides and a plurality of first air passages extending therethrough from the first side to the second side. The outer seat member has opposed third and fourth sides and a plurality of second air passages extending therethrough from the third side to the fourth side. Each of the inner and outer seat members contains a far-infrared radiation material molded therein. The multi-layer filter medium is sandwiched between the second side of the inner seat member and the third side of the outer seat member. The multi-layer filter medium has a polypropylene fabric layer and an activated carbon fiber layer connected to one another. The first air passages are registered with the second air passages.
Preferably, the first and second air passages are tapered from the first side to said fourth side.
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patent: 4261717 (1981-04-01), Belore et al.
patent: 4382440 (1983-05-01), Kapp et al.
patent: 4610705 (1986-09-01), Sarnosky et al.
patent: 4863499 (1989-09-01), Osendorf
patent: 5350444 (1994-09-01), Gould et al.
patent: 5423903 (1995-06-01), Schmitz et al.
patent: 5690719 (1997-11-01), Hodge
patent: 5718743 (1998-02-01), Donnelly et al.
patent: 5865863 (1999-02-01), DeSousa et al.
patent: 5900032 (1999-05-01), Wang
patent: 54-023094 (1979-02-01), None
patent: 57-167715 (1982-10-01), None
Darby & Darby
Spitzer Robert H.
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