8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 13, 2004

DONALDSON COMPANY, INC.

(Exact name of registrant as specified in its charter)

Delaware	1-7891	41-0222640
(State or other jurisdiction of incorporation)	(Commission file number)	(I.R.S. Employer Identification No.)

1400 West 94th Street

_______________Minneapolis, MN 55431_______________

(Address of principal executive offices)

____________________(952) 887-3131____________________

Registrant’s telephone number, including area code

____________________Not Applicable____________________

(Former name or former address, if changed since last report)

Item 5.

Other Events.

          On August 13, 2004, Donaldson Company, Inc. announced the outcome of post trial motions in the jury trial between Donaldson and Engineered Products Company, Inc., headquartered in Waterloo, Iowa. A copy of the press release that discusses this matter is filed as Exhibit 99.1 to, and incorporated by reference in, this report.

Item 7.

Financial Statements and Exhibits.

(c)

Exhibits.

99.1 Press release, dated August 13, 2004, issued by Donaldson Company, Inc.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

Date:  August 13, 2004

DONALDSON COMPANY, INC.


By:  /s/ Thomas R. VerHage        
       Name: Thomas R. VerHage
       Title: Vice President and
                Chief Financial Officer

EXHIBIT INDEX

Exhibit No.

Description

         99.1 Press Release, dated August 13, 2004, issued by Donaldson Company Inc.

EX-99.1

EXHIBIT 99.1

August 13, 2004

FROM:

FOR:

The Carideo Group Inc.

Donaldson Company, Inc.

1250 One Financial Plaza

P.O. Box 1299

120 South Sixth Street

Minneapolis, MN  55440

Minneapolis, MN  55402

(NYSE: DCI)

Tony Carideo

Rich Sheffer

(612) 317-2880

(952) 887-3753

Email: tony@carideogroup.com

Email: rsheffer@mail.donaldson.com

FOR IMMEDIATE RELEASE

DONALDSON COMPANY TO APPEAL JUDGMENT

MINNEAPOLIS, Aug. 13 — Donaldson Company, Inc. (NYSE:DCI) announced today the outcome of post trial motions in the jury trial between Donaldson and Engineered Products Company, Inc. (“EPC”). In 1998, EPC filed a patent infringement lawsuit against Donaldson in the U.S. Federal District Court for the Northern District of Iowa. On May 11, 2004, the jury found in favor of EPC on its willful infringement claims against Donaldson. On August 12, 2004, the Court ruled that damages should be approximately $16.0 million. Donaldson intends to vigorously challenge the judgment and will appeal the decision to the Federal Circuit Court of Appeals. This appeal could take up to two years or longer. EPC’s patent expired on May 1, 2001 and will not impact Donaldson’s ongoing business operations. Donaldson confirms previous guidance of delivering its 15^th consecutive year of double-digit earnings growth when it issues its fourth quarter earnings release on August 31.

About Donaldson Company, Inc.

Donaldson Company, Inc., headquartered in Minneapolis, Minn., is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development.  Donaldson serves customers in the industrial and engine markets including dust collection, power generation, specialty filtration, compressed air

Donaldson Company, Inc.
August 13, 2004
Page 2

purification, off-road equipment and trucks. Our 10,000 employees contribute to the company’s success at over 30 manufacturing locations around the world.  In fiscal year 2003, Donaldson reported sales of more than $1.2 billion and achieved its 14^th consecutive year of double-digit earnings growth.  Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI.  Additional company information is available at www.donaldson.com.

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