Michael J Gustafson

US Patent:

D470216, Feb 11, 2003

Filed:

Mar 28, 2002

Appl. No.:

29/158128

Inventors:

Michael J. Gustafson - Burnsville MN
Bernard A. Matthys - Apple Valley MN
Eivind Stenersen - River Falls WI
Brent A. Gulsvig - Faribault MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

2301

US Classification:

D23209

US Patent:

6752924, Jun 22, 2004

Filed:

Mar 28, 2002

Appl. No.:

10/109810

Inventors:

Michael J. Gustafson - Burnsville MN
Bernard A. Matthys - Apple Valley MN
Eivind Stenersen - River Falls WI

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 2708

US Classification:

210232, 210238, 210444, 210450, 2104932

Abstract:

A bowl-cartridge filter includes a filter cartridge and a bowl. The filter cartridge includes an interlock arrangement that is oriented to engage the filter bowl, when the filter cartridge is mounted in the filter bowl, and the bowl is rotated in a direction to remove the bowl-cartridge filter from a filter head. The filter bowl includes a cooperating interlock arrangement that engages the interlock arrangement on the filter cartridge. Example embodiments include cog arrangements, which include a plurality of projecting teeth. Various shapes for the teeth are possible, including house-shaped, truncated A-shaped, and pie wedged shape.

US Patent:

7055055, May 30, 2006

Filed:

Apr 24, 2000

Appl. No.:

09/719339

Inventors:

Eric D. Schneider - Plymouth MN, US
Michael J. Gustafson - Maple Grove MN, US
Daniel J. Hagler - Golden Valley MN, US

Assignee:

Symantec Corporation - Cupertino CA

International Classification:

G06F 11/00

US Classification:

714 6, 714 7, 714 8, 714 15, 714 16, 714 20, 711111, 711112, 711113, 711114

Abstract:

There is described a method of maintaining a record of changes to data on a recording medium and allowing reconstruction of the state of the medium at a prior time. Various alternative embodiments are provided to enhance and improve this process, including maintaining two copies in RAM of data that are compared to detect corruption prior to transferring to the recording medium, splitting logic protection and viewing, disguising the disk to protect against incompatible software, flushing a write cache by insuring a certain amount of time has passed, flushing a write cache by insuring a certain amount of free time has passed and inserting delays if required, inserting safe points after a drop in the rate of disk activity, inserting safe points periodically, flushing the entire OS cache after detecting the need to establish a safe point for one user, separating out user activity by watching directories and files, or the use of complex linked data structures to implement the engine where such data structures can be substantially reconstructed from sequentially organized tables in the event of corruption.

US Patent:

7225680, Jun 5, 2007

Filed:

Dec 13, 2004

Appl. No.:

11/011400

Inventors:

Michael Jon Gustafson - Burnsville MN, US
John R. Hacker - Bloomington MN, US
John F. Connelly - Chanhassen MN, US
Gus E. Breiland - Minneapolis MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

G01L 9/00

US Classification:

73754

Abstract:

An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge is arranged to measure a differential pressure between fluid in the first chamber and fluid in the second chamber. The differential pressure gauge has a variable output.

US Patent:

7886610, Feb 15, 2011

Filed:

Aug 24, 2005

Appl. No.:

11/210508

Inventors:

Michael Jon Gustafson - Inver Grove Heights MN, US
John R. Hacker - Bloomington MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

G01L 13/00

US Classification:

73736, 73753

Abstract:

An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge is arranged to measure a differential pressure between fluid in the first chamber and fluid in the second chamber. The differential pressure gauge has a variable output.

US Patent:

20020125188, Sep 12, 2002

Filed:

Mar 6, 2001

Appl. No.:

09/800413

Inventors:

John Hacker - Bloomington MN, US
David Harder - Burnsville MN, US
Jess Nordby - Minneapolis MN, US
Michael Gustafson - Inver Grove Heights MN, US
Alan Klein - Prescott WI, US

International Classification:

B01D035/30

US Classification:

210/443000, 210/450000

Abstract:

A liquid filter assembly includes a filter head having an interchangeable spin-on canister filter and a bowl-cartridge filter. Methods of using the liquid filter assembly include providing a filter head capable of operably receiving both a spin-on canister filter and a bowl-cartridge filter. The method also includes operably installing one of the spin-on canister filter and the bowl-cartridge filter onto the filter head to provide a filter assembly. After a period of use, the spin-on canister filter or bowl-cartridge filter is removed and replaced. The replacement can include, interchangeably, a spin-on canister filter and a bowl-cartridge filter. Constructions for accommodating an interchangeable system include preferred arrangements of mechanical connection structure.

US Patent:

20040079693, Apr 29, 2004

Filed:

Oct 21, 2003

Appl. No.:

10/691023

Inventors:

John Hacker - Bloomington MN, US
David Harder - Burnsville MN, US
Jess Nordby - Minneapolis MN, US
Michael Gustafson - Inver Grove Heights MN, US
Alan Klein - Prescott WI, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D035/30

US Classification:

210/249000, 210/440000

Abstract:

A liquid filter assembly includes a filter head having an interchangeable spin-on canister filter and a bowl-cartridge filter. Methods of using the liquid filter assembly include providing a filter head capable of operably receiving both a spin-on canister filter and a bowl-cartridge filter. The method also includes operably installing one of the spin-on canister filter and the bowl-cartridge filter onto the filter head to provide a filter assembly. After a period of use, the spin-on canister filter or bowl-cartridge filter is removed and replaced. The replacement can include, interchangeably, a spin-on canister filter and a bowl-cartridge filter. Constructions for accommodating an interchangeable system include preferred arrangements of mechanical connection structure.

US Patent:

20040232059, Nov 25, 2004

Filed:

Jun 15, 2004

Appl. No.:

10/867913

Inventors:

Michael Gustafson - Burnsville MN, US
Bernard Matthys - Apple Valley MN, US
Eivind Stenersen - River Falls WI, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D027/08
B01D035/30

US Classification:

210/232000, 210/238000, 210/440000, 210/444000, 210/450000, 210/493200

Abstract:

A bowl-cartridge filter includes a filter cartridge and a bowl. The filter cartridge includes an interlock arrangement that is oriented to engage the filter bowl, when the filter cartridge is mounted in the filter bowl, and the bowl is rotated in a direction to remove the bowl-cartridge filter from a filter head. The filter bowl includes a cooperating interlock arrangement that engages the interlock arrangement on the filter cartridge. Example embodiments include cog arrangements, which include a plurality of projecting teeth. Various shapes for the teeth are possible, including house-shaped, truncated A-shaped, and pie wedged shape.