Title:
Conical filter
United States Patent D396098


Inventors:
Gillingham, Gary R. (Prior Lake, MN)
Wagner, Wayne M. (Apple Valley, MN)
Tokar, Joseph C. (Apple Valley, MN)
Risch, Daniel T. (Burnsville, MN)
Rothman, Jim C. (Burnsville, MN)
Carter, Steven A. (Eagan, MN)
Application Number:
29/064621
Publication Date:
07/14/1998
Filing Date:
01/07/1997
Assignee:
Donaldson Company, Inc. (Minneapolis, MN)
Primary Class:
Field of Search:
D23/365, 210/439, 210/484, 210/493.4, 55/498
View Patent Images:
US Patent References:
5549724Filter element of air cleaner unitAugust, 1996Mochida
5549722Air filter assemblies and a frustoconical air filter element for use with the assembliesAugust, 1996Zemaitis et al.
5522909Air filter deviceJune, 1996Haggard
5458666Filter element of air cleaner unitOctober, 1995Miyakata
5322537Exhaust gas filter and method for making the sameJune, 1994Nakamura et al.55/498
5320657Staggered short pleat air filterJune, 1994Adams
D342990Air filter elementJanuary, 1994Jaroszczyk
5125940In-line air filter apparatusJune, 1992Stanhope et al.
5106397Air cleaner/noise silencer assemblyApril, 1992Jaroszczyk et al.
4936413In-line noise attenuation device for a gas conduitJune, 1990Lee
4925561Composite planar and triangularly pleated filter elementMay, 1990Ishii et al.
4782912Engine air cleaner - noise reducerNovember, 1988Wandless
4589983Fluid filtering deviceMay, 1986Wydevan
4498989Fluid filter element and supportFebruary, 1985Miyakawa et al.210/493.4
4439321Filter meansMarch, 1984Taki et al.
4430223Filter element for filtering fluid and method of producing sameFebruary, 1984Miyakawa et al.
4199387Air filter fabrication methodApril, 1980Hladik
4157902Air cleaner system for over-highway trucksJune, 1979Tokar
4039457Coiled filter element for filtering of liquidsAugust, 1977Schacht et al.
3807150ABSOLUTE FILTER PACK STRUCTURE HAVING A TOROIDAL SECTIONApril, 1974Maracle
3738088MOBILE AIR CLEANING APPARATUS FOR POLLUTION REMOVALJune, 1973Colosimo
3112184Method of making ceramic articlesNovember, 1963Hollenbach
2558185Air cleaner and element thereforJune, 1951Leisen
2552615Muffler with spiral conical insertMay, 1951Baltzer
1639133Filter elementAugust, 1927Greene



Foreign References:
GB703823February, 1954
Primary Examiner:
Lichtenstein, Lisa
Attorney, Agent or Firm:
Merchant, Gould, Smith, Edell, Welter & Schmidt
Claims:
1. The ornamental design for a conical filter, as shown and described.

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.