Gas separation – Multiple bag type filters in chamber
Reexamination Certificate
2001-12-14
2004-06-01
Reifsnyder, David A. (Department: 1723)
Gas separation
Multiple bag type filters in chamber
C055S385300, C055S514000, C055S521000, C055S525000, C055S527000, C055SDIG005, C156S167000, C156S242000, C210S490000, C210S497010, C264S112000, C264S255000, C264S257000, C427S180000, C427S244000
Reexamination Certificate
active
06743270
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The invention relates to a filter whose filter portion has a plurality of bag-like members and a manufacturing method of the filter.
2. Description of Related Art
A schematic drawing of a general filter for an internal combustion engine is shown in
FIG. 4. A
filter
50
consists of a filter portion
52
for filtering fluid and a flange portion
55
formed at the periphery of the filter portion
52
. The filter portion
52
comprises a bellows-type wavy board
53
and a side wall board
54
connected to each side of the wavy board
53
. The bellows-type wavy board
53
and side wall boards
54
constitute a series of multiple bag-like members F, with generally triangular sections.
The bag-like members F are susceptible to deformation in a direction (Y direction) orthogonal to a folding line S because the bag-like members F are formed by the wavy boards
53
.
SUMMARY OF THE INVENTION
The invention thus provides a filter with a filter portion which does not easily deform by improving the strength of the filter.
A first exemplary aspect of the invention is a filter in which the filter portion comprises a plurality of bag-like members. The bag-like member is formed in a container shape having an opening and the bag-like members are all disposed with intervals therebetween. The periphery of the opening of the bag-like member is supported by a supporting member which interconnects each of the bag-like members.
According to the first exemplary aspect, the bag-like members are disposed with intervals therebetween, and the periphery of the opening of each bag-like member is supported by the supporting member.
In the aforementioned exemplary aspect, the bag-like member may be formed such that a centerline thereof is orthogonal to the opening and the shape of the section parallel to the opening forms a circle or polygon. This prevents the bag-like member from deforming easily due to the fluid passing therethrough and enables a filtering efficiency drop caused by adhesion of adjacent bag-like members to be suppressed.
Also in the exemplary aspect stated above, the supporting member may be formed such that, on a plane surface of the supporting member, a plurality of straight lines that traverse the supporting member exist thereon without interfering with any of the bag-like members, and each straight line intersects with the other straight lines in at least one place each. By doing so, the straight lines function as a framework (beams) that connects the edges of the supporting member, thereby increasing the strength of the supporting member.
A second exemplary aspect of the invention is a method for manufacturing the filter explained in the aforementioned exemplary aspect. The manufacturing method comprises a step of preparing a forming die having a forming surface formed in a shape almost identical to that of one side of the filter and a step of laminating fibers over the forming surface of the forming die. This method facilitates the manufacturing of the filter explained in the aspect above.
REFERENCES:
patent: 5271883 (1993-12-01), Timmons et al.
patent: 5674302 (1997-10-01), Nakayama et al.
patent: 5851250 (1998-12-01), Sugie et al.
patent: 6183530 (2001-02-01), Herding et al.
patent: 6454827 (2002-09-01), Takagaki et al.
patent: 27 36 433 (1979-02-01), None
patent: 0 783 914 (1997-07-01), None
patent: 0 804 958 (1997-11-01), None
patent: A 8-38834 (1996-02-01), None
patent: A 10-128020 (1998-05-01), None
patent: WO 00 24497 (2000-05-01), None
Machine Translation of JP A 08-38834 from the Japanese Intellectual Property Digital Library Home Page. JP A 08-38834 is dated Feb. 13, 1996.*
Abstracted Publication No. DE 27 36 433 A has a Derwent Access No. of 1979-14402B. DE 27 36 433 A is dated Feb. 15, 1979.
Honda Minoru
Oda Kouichi
Takagaki Takanari
Reifsnyder David A.
Toyoda Boshoku Corporation
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