Conical filter

Info

Patent number: D396098
Type: Grant
Filed: Jan 7, 1997
Date of Patent: Jul 14, 1998
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventors: Gary R. Gillingham (Prior Lake, MN), Wayne M. Wagner (Apple Valley, MN), Joseph C. Tokar (Apple Valley, MN), Daniel T. Risch (Burnsville, MN), Jim C. Rothman (Burnsville, MN), Steven A. Carter (Eagan, MN)
Primary Examiner: Lisa Lichtenstein
Law Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt
Application Number: 0/64,621

Description

Description

FIG. 1 shows a perspective view of a conical filter, showing our new design;

FIG. 2 shows a bottom perspective view of the filter device shown in FIG. 1;

FIG. 3 shows a side elevational view of the filter device shown in FIG. 1;

FIG. 4 shows a top plan view of the filter device shown in FIG. 1;

FIG. 5 shows a bottom plan view of the filter device shown in FIG. 1;

FIG. 6 shows a cross-sectional view thereof taken along line 6--6 in FIG. 1;

FIG. 7 shows a perspective view of a conical filter showing a second embodiment of our new design;

FIG. 8 shows a bottom perspective view of the filter device shown in FIG. 7;

FIG. 9 shows a side elevational view of the filter device shown in FIG. 7;

FIG. 10 shows a top plan view of the filter device shown in FIG. 7;

FIG. 11 shows a bottom plan view of the filter device shown in FIG. 7;

FIG. 12 shows a cross-sectional view thereof, taken along line 12--12 in FIG. 7;

FIG. 13 shows a perspective view of a conical filter showing a third embodiment of our new design;

FIG. 14 shows a bottom perspective view of the filter device shown in FIG. 13;

FIG. 15 shows a side elevational view of the filter device shown in FIG. 13;

FIG. 16 shows a top plan view of the filter device shown in FIG. 13;

FIG. 17 shows a bottom plan view of the filter device shown in FIG. 13; and,

FIG. 18 shows a cross-sectional view thereof, taken along line 18--18 in FIG. 13.

The sole difference between the three embodiments resides in the appearance of the size of the diameter.