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Liquid Purification

Coolant-filter-having-a-delayed-release-supplemental-coolant-additive-cartridge

Peroxide-curable fluorosilicone copolymer compositions

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Coolant filter having a delayed release supplemental coolant additive cartridge

Details

Inventors: Brown, Gene W.;
Assignee: Baldwin Filters, Inc. (Kearney, NE)
Primary Examiner: Lithgow; Thomas M.
Assistant Examiner:
Attorney, Agent or Firm: Leydig, Voit & Mayer, Ltd.

A coolant filter for a diesel engine having a mechanism for delayed release of chemical additives into the coolant being filtered. The present invention provides a spin-on canister type coolant filter which combines the functions of filtering the coolant of the diesel engine cooling system with the function of adding supplemental coolant additives to the coolant to reduce or eliminate the effects of cavitation erosion caused by vibration of the cylinder liners of the diesel engine. The filter includes a chemical additive cartridge mounted within an outer shell and a filter cartridge mounted about the chemical additive cartridge and inside the outer shell. Coolant to be filtered passes by the chemical additive cartridge, which slowly releases the chemical additive into the passing coolant stream. The coolant containing the chemical additive then passes through the filter to remove relatively large pieces of the chemical additive as well as other debris before exiting the filter for subsequent cooling of the diesel engine. In order to slowly release the chemical additive, the chemical cartridge includes relatively small air vents and outlets and the filter outlet includes a restriction orifice which further slows the release of the chemical additive into the coolant stream.

DETAILED DESCRIPTION It is therefore a primary aim of the present invention to provide a coolant filter for a diesel engine which provides a delayed release of supplemental coolant additives into the coolant stream.
It is an objective of the present invention to provide a coolant filter which not only provides a delayed release for chemical additives into the coolant stream to reduce the effects of cavitation erosion, but which also filters the coolant after the chemicals have been added thereto to prevent detrimentally large particulates and pellet coatings from coming into contact with the moving parts of the diesel engine.
It is another objective of the present invention to provide a delayed release chemical coolant filter which reliably releases the chemical additives into the coolant stream without slowing or completely stopping the flow of the chemical additives or the coolant as by clogging.
It is another objective of the present invention to provide a delayed release chemical coolant filter which includes sufficient filtering media and chemical additives to substantially increase the life of the filter and the interval at which the filter needs to be replaced.
It is a further objective of the present invention to minimize the flow of coolant past the supplemental coolant additive chemicals in order to slow the dissolution of the supplemental coolant additive pellets contained within the filter.
It is still another objective of the present invention to provide a method by which a delayed release chemical coolant filter can be quickly and economically manufactured.
In accordance with these aims and objectives, it is a feature of the present invention to provide a filter having a chemical additive cartridge past which the water or coolant flows to have the chemical additives released therein.
Little or no pressure differential is created across the supplemental coolant additive pellets to thereby slow the dissolution of the additive pellets and allow the SCA to slowly flow into the coolant stream

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