Davco Technology, LLC

Davco Manufacturing L.l.c.

Ken Conti

Kevin John Rucinski

Paul B Smith

Alfred Tondreau

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.

Filter cartridge with divider

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.

Filter cartridge with pressure relief valve

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

Fluid filter with restrictive filter media for pressure relief

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.

Method for determining when to replace a filter having a pressure relief valve

Fluid filter with pressure relief valve

A fluid filter assembly having a relief valve for visually indicating &lsqb;the life of&rsqb; 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 said housing. A filter element is disposed within the housing between the fluid inlet and the fluid outlet for filtering the fluid. In &lsqb;the preferred&rsqb; a first embodiment, a &lsqb;frusto-conical&rsqb; 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 practical &lsqb;visual&rsqb; indicator that the filter element may be replaced &lsqb;needs replacement&rsqb;.

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Hampstead, NH, United States of America

Ken Conti