No-cure fuel filter and method for making same

• US 6,293,410 B1
• Filed: 06/29/1999
• Issued: 09/25/2001
• Est. Priority Date: 06/29/1999
• Status: Expired due to Fees

• Current Assignee: Mahle Filter Systems Kabushiki Kaisha
• Original Assignee: Mahle Filter Systems Kabushiki Kaisha
• Inventors: Forbes, Larry D.
• Primary Examiner(s): Walker, W. L.
• Assistant Examiner(s): Ocampo, Marianne S.
• Application Number:
  US09/342,612
• Time in Patent Office: 819 Days
• Field of Search: 210/446, 210/447, 210/450, 210/453, 210/454, 210/455, 210/483, 210/484, 210/232, 210/451, 210/509, 210/500.26, 210/323.2, 210/497.01, 210/437-438, 210/448, 210/488, 210/DIG.13, 210/DIG.17, 210/503, 210/506, 210/508
• US Class Current: 210/446
• CPC Class Codes: B01D 2101/005 with a binder between the individual particles or fibres
• CPC Class Codes: B01D 2201/4084 Snap or Seeger ring connecting means
• CPC Class Codes: B01D 29/15 arranged for inward flow filtration
• CPC Class Codes: B01D 29/21 with corrugated, folded or wound sheets
• CPC Class Codes: B01D 29/56 in series connection
• CPC Class Codes: B01D 35/26 Filters with built-in pumps filters provided with a pump mounted in or on the casing aquarium pumps or filters A01K63/04

Abstract

A no-cure fuel filter and method of making same is disclosed. The no-cure fuel filter utilizes a non-organic, mineral based filter element which replaces the pleated paper type filter element of conventional fuel filters. The no-cure fuel filter may be used for gasoline blended fuels, ethanol blended fuels, diesel fuel blends, propane fuel blends, or methanol fuel blends, and may be used for primary filtration, secondary filtration or final filtration. The no-cure fuel filter comprises a non-organic mineral based filter element disposed along a path of flow of unfiltered fuel in a fuel system of a vehicle. The filter element includes an exterior periphery and an interior periphery and a first end and a second end. The no-cure fuel filter further comprises end caps disposed over and fluidly sealing the first and second ends of the filter element, such that the unfiltered fuel must pass through the filter element from one of the peripheries to the other periphery.

Claims

1. A no-cure fuel filter for vehicles, comprising:

a non-organic mineral based secondary fuel filter element disposed within a path of flow of unfiltered fuel in a fuel system of a vehicle, said filter element having an exterior periphery and an interior periphery and a first end and a second end, said filter element being fiberglass bonded with a thermoset adhesive binder;

end caps disposed over and fluidly sealing said first and second ends of said filter element, such that said unfiltered fuel must pass through said filter element from one of said peripheries to said other periphery;

wherein said end caps are secured together in fixed relation by a snap connection with said filter element compressed therebetween; and

wherein said snap connection is comprised of an elongated snap connector extending from one of said end caps through said interior periphery of said filter element and through an aperture in another one of said end caps.

2. A no-cure fuel filter for vehicles, comprising:

a non-organic mineral based primary fuel filter element disposed within a path of flow of unfiltered fuel in a fuel system of a vehicle, said filter element having an exterior periphery and an interior periphery and a first end and a second end, said filter element being fiberglass bonded with a thermoset adhesive binder;

end caps disposed over and fluidly sealing said first and second ends of said filter element, such that said unfiltered fuel must pass through said filter element from one of said peripheries to said other periphery;

wherein said end caps are secured together in fixed relation by a snap connection with said filter element compressed therebetween; and

wherein said snap connection is comprised of a plurality of locking tabs extending from one of said end caps along said outside periphery of said filter element and into a plurality of mating locking clips disposed on an outer periphery of another one of said end caps.

3. A method for manufacturing a no-cure fuel filter for vehicles, comprising:

providing a non-organic mineral based filter element of fiberglass bonded with a thermoset adhesive binder disposed within a path of flow of unfiltered fuel in a fuel system of a vehicle, said filter element having an exterior periphery and an interior periphery and a first end and a second end;

placing end caps onto said first and second ends of said filter element to fluidly seal said ends, such that said unfiltered fuel must pass through said filter element from one of said peripheries to said other periphery;

securing said end caps together in fixed relation by a snap connection with said filter element compressed therebetween; and

wherein said snap connection is comprised of an elongated snap connector extending from one of said end caps through said interior periphery of said filter element and through an aperture in another one of said end caps.

4. A method for manufacturing a no-cure fuel filter for vehicles, comprising:

providing a non-organic mineral based filter element of fiberglass bonded with a thermoset adhesive binder disposed within a path of flow of unfiltered fuel in a fuel system of a vehicle, said filter element having an exterior periphery and an interior periphery and a first end and a second end;

placing end caps onto said first and second ends of said filter element to fluidly seal said ends, such that said unfiltered fuel must pass through said filter element from one of said peripheries to said other periphery;

securing said end caps together in fixed relation by a snap connection with said filter element compressed therebetween; and

wherein said snap connection is comprised of a plurality of locking tabs extending from one of said end caps along said outside periphery of said filter element and into a plurality of mating locking clips disposed on an outer periphery of another one of said end caps.

5. A no-cure fuel filter for vehicles, comprising:

a non-organic mineral based filter element disposed within a path of flow of unfiltered fuel in a fuel system of a vehicle, said filter element having an exterior periphery and an interior periphery and a first end and a second end, said filter element being fiberglass bonded with a thermostat adhesive binder;

end caps disposed over and fluidly sealing said first and second ends of said filter element, such that said unfiltered fuel must pass through said filter element from one of said peripheries to said other periphery;

wherein the fiberglass has a nominal fiber diameter of between 0.00020 and 0.00024 inches, a density of 5.8 pounds per cubic foot and a phenolic binder of 10%±

3% by weight; and

wherein said fiberglass has a spiral interleaf of AA fibers between 0.75 and 1 microns, a density of 5.3 gm/sf, a phenolic binder content of 13.5% and a thickness of 0.25 inches.