Cylindrical pleated air filter with top and sidewall filtering areas

- K & N Engineering, Inc.

FIG. 1 is a side elevational view of an air filter showing our new design, the other sides being identical to that shown;

FIG. 2 is a bottom plan view;

FIG. 3 is a top plan view;

FIG. 4 is a perspective view;

FIG. 5 is an enlarged fragmentary sectional view taken along line 5--5 of FIG. 3 ; and,

FIG. 6 is an enlarged fragmentary perspective view showing details of the pleats.

Referenced Cited
U.S. Patent Documents
1892210 December 1932 Gordon
2663660 December 1953 Layte
4056876 November 8, 1977 Lammermann
4938869 July 3, 1990 Bayerlein et al.
Patent History
Patent number: D403414
Type: Grant
Filed: Nov 10, 1997
Date of Patent: Dec 29, 1998
Assignee: K & N Engineering, Inc. (Riverside, CA)
Inventors: Nathan E. Shelton (Riverside, CA), Duncan Bickerton (Warrington)
Primary Examiner: Lisa Lichtenstein
Attorney: John E. Wagner
Application Number: 0/79,234
Current U.S. Class: Filter (D23/365)
International Classification: 2304;