Gas separation – With means securing or retaining separating media – Unit or cohesive sheet-like media in flow line or frame
Reexamination Certificate
2000-07-12
2001-11-20
Simmons, David A. (Department: 1724)
Gas separation
With means securing or retaining separating media
Unit or cohesive sheet-like media in flow line or frame
C055S385300, C055S492000, C055S502000, C055S510000, C055S511000, C055S521000, C055SDIG003
Reexamination Certificate
active
06319300
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an air filter, and particularly to a filter assembly of an air filter.
2. Description of the Prior Art
A conventional air filter of a car usually comprises a fixed frame made of a metal sheet punched into form, and the inner edge thereof is glued with a cotton filter, which is a flat cotton sheet to be punched and folded into a corrugated filter net, or a cylindrical filter; conventionally, the air filter is merely mounted in place with a glue, and is fitted in a given container to prevent the cotton filter from being hit or damage.
To prevent from being damaged by impact, both sides of a cotton filter are covered with metal screens respectively; then, the cotton filter is cut into a suitable size to be pressed into a corrugated filter sheet, which is to be put in a mold cavity; by means of a thermal molding, the edge of the filter sheet is glued with a rubber frame, and the rubber frame is mounted in a mounting cavity of an air filter. Since the time for forming a rubber frame around the filter sheet is much long, the edge portion of the filter net is subject to being covered by the thermal rubber material; in that case, the ventilation capability would be affected.
SUMMARY OF THE INVENTION
The prime object of the present invention is to provide a filter sheet, of which both sides of the cotton filter are covered with a metal screen; the filter sheet is then cut into a suitable size, and is pressed into a corrugated sheet to be mounted in a clamp space between an upper clamp plate and a lower clamp plate of two horizontal lintels; both sides thereof are mounted between two vertical jambs. The corner ends of the horizontal lintel and the vertical jamb are connected together by using a connection plate so as to form into a complete air filter.
Another object of the present invention is to provide a filter assembly of an air filter, in which the upper clamp plate and the lower clamp plate on both sides of the clamp space between two horizontal lintels are furnished with a plurality of corrugated positioning grooves respectively for receiving the corrugated filter sheet; after the aforesaid parts being assembled together, a pressing and punching process should be done so as to have the corrugated filter sheet mounted in place firmly between the upper clamp plate and the lower clamp plate.
Still another object of the present invention is to provide a filter assembly of an air filter, in which the corner ends of the horizontal lintel and the vertical jamb are furnished with hollow grooves respectively for receiving a connection plate; after the upper and lower clamp plates of the horizontal lintel are clamped towards the filter sheet, the horizontal lintel and the vertical jamb will be punched and riveted together as one piece.
A further object of the present invention is to provide a filter assembly of an air filter, in which the upper and lower frame sides of the horizontal lintels extend an upper and lower clamp plates respectively. Both the upper and lower clamp plates are furnished with a plurality of corrugated positioning grooves. After the clamp space between the upper and lower clamp plates is mounted with a corrugated filter sheet, a pressing and a punching steps will be processed so as to fasten the ends of the corrugated filter sheet in the positioning grooves firmly.
A still further object of the present invention is to provide a filter assembly of an air filter, in which the inner ends of the upper and lower frame sides have straight surfaces, and a clamp space is formed between the two straight surfaces; both ends thereof are furnished with an upper and a lower fastening plates for holding the corrugated filter sheet therein. The corner ends of the horizontal lintel and the vertical jamb are connected together with a L-shaped connection plate and screws so as to have the corrugated filter sheet fastened in the horizontal lintel and the vertical jamb firmly.
Yet another object of the present invention is to provide a filter assembly of an air filter, in which the fixed frame includes horizontal lintels and vertical jambs; the outer ring edge of the fixed frame is covered with a rubber cover so as to facilitate the filter assembly to mount in the mounting cavity of an air filter.
Yet still another object of the present invention is to provide a filter assembly of an air filter, in which the fixed frame includes horizontal lintels and vertical jambs; the outer ring edge of the fixed frame is attached with a foam rubber belt so as to have the filter assembly had a resilient foam rubber frame to be fitted in the mounting cavity of an air filter.
Yet a further object of the present invention is to provide a filter assembly of an air filter, in which the corrugated filter assembly includes a cotton filter sandwiched between two layers of metal screens; both sides of the cotton filter are covered with an edge strip; after the filter assembly is inserted in the clamp space of the horizontal lintels, the filter assembly will be in close contact with the inner surface of the straight plate of the horizontal lintels.
REFERENCES:
patent: 2709489 (1955-05-01), Keebler
patent: 3183286 (1965-05-01), Harms
patent: 5059218 (1991-10-01), Pick
patent: 5531892 (1996-07-01), Duffy
patent: 5618324 (1997-04-01), Sommer et al.
patent: 5879423 (1999-03-01), Luka et al.
patent: 5968217 (1999-10-01), Stein et al.
patent: 5980600 (1999-11-01), Stopyra et al.
patent: 5989303 (1999-11-01), Hodge
Pham Minh-Chau T.
Simmons David A.
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