Alfred J Tondreau

US Patent:

6841065, Jan 11, 2005

Filed:

Nov 22, 2002

Appl. No.:

10/301946

Inventors:

Paul B. Smith - Ann Arbor MI, US
Kevin J. Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead NH, US

Assignee:

Davco Manufacturing, L.L.C. - Saline MI

International Classification:

B01D 2710

US Classification:

210 94, 210132, 210443, 210456

Abstract:

A fluid filter assembly having a relief valve for visually indicating when a filter element may be replaced. The fluid filter assembly of the present invention provides a vertical, transparent housing having a fluid inlet for communicating a fluid into the housing and a fluid outlet for communicating fluid downstream of the housing. A filter element is disposed within the housing between the fluid inlet and the fluid outlet for filtering the fluid.

US Patent:

7150824, Dec 19, 2006

Filed:

Dec 30, 2004

Appl. No.:

11/027168

Inventors:

Paul B. Smith - Ann Arbor MI, US
Kevin J. Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead NH, US

Assignee:

Davco Technology, LLC - Saline MI

International Classification:

B01D 35/143

US Classification:

210 95, 210130

Abstract:

A fluid filter assembly having a relief valve for visually indicating when a filter element may be replaced. The fluid filter assembly of the present invention provides a vertical, transparent housing having a fluid inlet for communicating a fluid into the housing and a fluid outlet for communicating fluid downstream of the housing. A filter element is disposed within the housing between the fluid inlet and the fluid outlet for filtering the fluid.

US Patent:

7615146, Nov 10, 2009

Filed:

Oct 17, 2006

Appl. No.:

11/581856

Inventors:

Paul B. Smith - Ann Arbor MI, US
Kevin J. Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead NH, US

Assignee:

Davco Technology, LLC - Saline MI

International Classification:

B01D 27/10

US Classification:

210 90, 210 94, 210132

Abstract:

A fluid filter assembly having a relief valve for visually indicating when a filter element may be replaced. The fluid filter assembly of the present invention provides a vertical, transparent housing having a fluid inlet for communicating a fluid into the housing and a fluid outlet for communicating fluid downstream of the housing. A filter element is disposed within the housing between the fluid inlet and the fluid outlet for filtering the fluid. The relief valve can also be in the form of a more restrictive filter media.

US Patent:

7854837, Dec 21, 2010

Filed:

Nov 10, 2008

Appl. No.:

12/267916

Inventors:

Paul B. Smith - Ann Arbor MI, US
Kevin J. Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead MI, US

Assignee:

Davco Technology, LLC - Saline MI

International Classification:

B01D 27/10

US Classification:

210 94, 210130, 210132

Abstract:

A filter cartridge includes a substantially cylindrical filter media and a pressure relieving structure. The filter media is adapted to allow fluid to pass from an exterior of the filter media to an interior space of the filter media. The pressure relieving structure is disposed at an upper end of the filter media, and the pressure relieving structure opens when a predetermined pressure level is established across the filter media to maintain the predetermined pressure across the filter media.

US Patent:

20020125178, Sep 12, 2002

Filed:

Mar 7, 2001

Appl. No.:

09/800982

Inventors:

Paul Smith - Ann Arbor MI, US
Kevin Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead NH, US

International Classification:

B01D035/143

US Classification:

210/090000, 210/137000

Abstract:

A fluid filter assembly having a relief valve for visually indicating the life of a filter element. The fluid filter assembly of the present invention provides a vertical, transparent housing having a fluid inlet for communicating a fluid into the housing and a fluid outlet for communicating fluid downstream of said housing. A filter element is disposed within the housing between the fluid inlet and the fluid outlet for filtering the fluid. In the preferred embodiment, a frusto-conical divider is connected to the top of the filter element and extends downward adjacent a bottom portion of the filter element wherein the fluid from the inlet rises between the filter element and the inside of the divider and between the outside of the divider and an inside surface of the housing. A relief valve is provided in the top of the filter element and is in communication with the unfiltered and filtered side of the filter element. The relief valve opens at a predetermined pressure level across the filter element thereby raising the fluid level and providing a visual indicator that the filter element needs replacement.

US Patent:

20110017658, Jan 27, 2011

Filed:

Oct 4, 2010

Appl. No.:

12/897457

Inventors:

Paul B. Smith - Ann Arbor MI, US
Kevin J. Rucinski - Saline MI, US
Alfred Tondreau - Saline MI, US
Ken Conti - Hampstead MI, US

Assignee:

DAVCO TECHNOLOGY, LLC - Saline MI

International Classification:

B01D 27/10
B01D 27/00
B01D 27/06

US Classification:

210456

Abstract:

A filter cartridge includes a substantially cylindrical filter media having a first end and a second end wherein the second end has an opening adaptable to receive a fluid outlet. The filter media is adapted to allow fluid to pass from an exterior of the filter media to an interior space of the filter media. A divider is positioned adjacent to the exterior of the filter media, and the divider has a closed end connected to the first end of the filter media and an open end that is longitudinally-spaced from the second end of the filter media such that at least a portion of the filter media located adjacent to the second end of the filter media is not directly adjacent to the divider. The divider extends a majority of the distance from the first end to the second end of the filter media.