Acid-neutralizing filter media
AssigneeFleetguard, Inc.
InventorsWilliam Haberkamp, David Stehouwer, Barry Verdegan
Life of this patent
Estimating the term…
Abstract
Acid-neutralizing filter media includes filter media fibers in combination with a strong base of small particle size and high surface area attached to and immobilized on the filter media fibers, and methodology therefor.
Claims44
Acid-neutralizing filter media for a liquid filter comprising filter media fibers of diameter greater than 1 μm in combination with particles of acid-neutralizing base material of diameter less than one-half the diameter of said filter media fibers and attached to and immobilized on said filter media.
Acid-neutralizing filter media for a liquid filter comprising in combination acid-neutralizing base material of surface area greater than 10 m2/gm and particle diameter size less than 10 μm attached to and immobilized on filter media fibers.
A method for attaching an acid-neutralizing base to filter media for a liquid filtration system, comprising providing a slurry of filter media material, mixing base material in said slurry, attracting and bindingly attaching said base material to said filter media material, drying said slurry to filter media having said acid-neutralizing base immobilized thereon.
A method for making acid-neutralizing filter media for a liquid filter in a liquid filtration system comprising:
- providing filter media material in the form of a plurality of fibers;
- providing acid-neutralizing base material in the form of a plurality of particles in a powder;
- providing a binder in the form of a resin;
- combining and mixing a combination of said fibers, said powder, and said resin in a slurry;
- drying said slurry to form said filter media.
A method for making a filter with a strong base for reacting with lubricant containing combustion acids neutralized by a weak base to form a neutral salt in an internal combustion engine lubricant circulation system, during circulation of said lubricant said strong base replacing said weak base and retaining said combustion acids as immobilized deposits on said filter media, said replaced weak base returning to said circulation system for re-use to neutralize further combustion acids, comprising attaching said strong base to said filter media with strong base material of particle size chosen small enough to enhance chemical activity, retention and immobilization thereof on said filter media and also such that in the event of unintended migration of said particles from said filter media, said particles are small enough to pass through said internal combustion engine lubricant circulation system and return to said filter.
Dependencies are inferred from the claim text.