Panel filter construction

Info

Patent number: D402361
Type: Grant
Filed: Jul 11, 1996
Date of Patent: Dec 8, 1998
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventors: Larry R. Nepsund (Savage, MN), Kathleen A. Abrahamson (Prior Lake, MN), Thomas A. Boeckermann (Lakeville, MN), James K. Elfstrand (Mounds View, MN)
Primary Examiner: Lisa Lichtenstein
Law Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt, P.A.
Application Number: 0/56,896

Description

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.