Pleat spacer for air filter

- Donaldson Company, Inc.
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Description

FIG. 1 is a perspective view of a pleat spacer for air filter;

FIG. 2 is a right side elevational view of FIG. 1, the left side elevational view being a mirror image thereof with an identical appearance;

FIG. 3 is a front side elevational view of FIG. 1, the back side elevational view being a mirror image thereof with an identical appearance;

FIG. 4 is a bottom plan view of FIG. 1; and,

FIG. 5 is a top plan view of FIG. 1.

Claims

The ornamental design for a pleat spacer for air filter, as shown and described.

Referenced Cited
U.S. Patent Documents
2135863 November 1938 Walker
3138443 June 1964 Engle et al.
3606739 September 1971 Peterson
3789589 February 1974 Delaney et al.
3869392 March 1975 Wolf
4133661 January 9, 1979 Strnad
4488966 December 18, 1984 Schaeffer
4547950 October 22, 1985 Thompson
4617122 October 14, 1986 Kruse et al.
4701196 October 20, 1987 Delany
4963171 October 16, 1990 Osendorf
5273563 December 28, 1993 Pasch et al.
5273564 December 28, 1993 Hill
5290345 March 1, 1994 Osendorf et al.
Foreign Patent Documents
1073826 March 1980 CA
Other references
  • Declaration of Richard J. Osendorf with Exhibits A-C.
Patent History
Patent number: D468007
Type: Grant
Filed: Nov 12, 1997
Date of Patent: Dec 31, 2002
Assignee: Donaldson Company, Inc. (Minneapolis, MN)
Inventors: Richard J. Osendorf (West St. Paul, MN), Timothy John Smith (Minneapolis, MN)
Primary Examiner: Lisa Lichtenstein
Attorney, Agent or Law Firm: Merchant & Gould P.C.
Application Number: 29/134,001
Classifications
Current U.S. Class: Filter (D23/365)
International Classification: 2304;