Panel filter construction

Description

FIG. 1 is a perspective view of a panel filter construction;

FIG. 2 is an enlarged right side view of FIG. 1, the left side being identical thereto;

FIG. 3 is an enlarged top plan view of FIG. 1;

FIG. 4 is an enlarged bottom plan view of FIG. 1;

FIG. 5 is an enlarged front side view of FIG. 1, the back side view being identical thereto;

FIG. 6 is a perspective view of a second embodiment of a panel filter construction; separate layers of filter media in the construction being indicated to contrast in appearance;

FIG. 7 is an enlarged right side view of FIG. 6, the left side being identical thereto;

FIG. 8 is an enlarged top plan view of FIG. 6;

FIG. 9 is an enlarged bottom plan view of FIG. 6;

FIG. 10 is an enlarged front side view of FIG. 6, the back side view being identical thereto;

FIG. 11 is a perspective view of another embodiment of a panel filter construction; an outermost layer of media being lined to indicate blue color, and a next inner layer being marked to indicate color contrast;

FIG. 12 is an enlarged right side view of FIG. 11, the left side being identical thereto;

FIG. 13 is an enlarged top plan view of FIG. 11;

FIG. 14 is an enlarged bottom plan view of FIG. 11; and,

FIG. 15 is an enlarged front side view of FIG. 11, the back side view being identical thereto.

Claims

The ornamental design for a panel filter construction, as shown and described.

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Inventors:	Nepsund; Larry R. (Savage, MN), Abrahamson; Kathleen A. (Prior Lake, MN), Boeckermann; Thomas A. (Lakeville, MN), Elfstrand; James K. (Mounds View, MN)
Assignee:	Donaldson Company, Inc. (Minneapolis, MN)
Appl. No.:	D/056,896
Filed:	July 11, 1996

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Current U.S. Class:	D23/365; D23/355
Current International Class:	2304
Field of Search:	;D23/355,365 ;55/499

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References Cited [Referenced By]

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U.S. Patent Documents

D300848	April 1989	Baker et al.
2174528	October 1939	Prentiss
3727769	April 1973	Scholl
3766629	October 1973	Lechtenberg
3837995	September 1974	Floden
4069026	January 1978	Simm et al.
4086070	April 1978	Argo et al.
5368622	November 1994	McMillon
5423903	June 1995	Schmitz et al.

Foreign Patent Documents

	0 212 082		Mar 1987		EP
	0 347 188		Dec 1989		EP

Other References

"Nonwovens in Filtration/Separation", paper presented by Clarke A. Rodman and Edward C. Homonoff, Allied Aftermarket Division, Allied Signal Corporation, Nonwoven Fabrics Forum, Jun. 21-23, 1988, Clemson University, Clemson, S.C. . 1989 SAE Handbook, vol. 3, Engines, Fuels, Lubricants, Emissions & Noise, pp. 24.45-24.47..

Primary Examiner: Lichtenstein; Lisa
Attorney, Agent or Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt, P.A.