US3552553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual media filtration cartridge
Assignee: TORITE ENTERPRISES Inc
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Filing: 1967-10-06
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Granted: 1971-01-05
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Expires: 1987-10-06
Abstract
Abstract A fluid filter cartridge which includes a dual stage filtration media, the first stage of which is a precleaner of depth medium composed of a foamlike material for removing contamination of a first predetermined fineness and a second stage surface medium which may be composed of a pleated paper or felt-type media which removes contaminations passed by the first stage filter. The cartridge is further characterized by the foamlike medium having convolute structural configuration on one surface thereof which causes the material of the foamlike medium to bear evenly on the pleated paper filter media.
Inventors
- 👤 James E Reading
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:00
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/23; B01D29/232; B01D29/50; B01D29/56; B01D29/58; B01D2201/00; B01D2201/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
100 words
A fluid filter cartridge comprising: an elongated perforated core member having a longitudinal axis; a final filtration medium being disposed about the periphery of said core member and being comprised of a pleated porous and fibrous material having the pleats thereof extending parallel to the longitudinal axis of said core member; and a primary filtration medium being disposed about the periphery of said final filtration member, said final filtration mEmber being comprised of an open-cell foamlike structure, said primary filtration medium has one surface thereof having a plurality of convolute configurations protruding therefrom which bear upon said final filtration medium.
Claim 2
Dependent Claim
100 words
A fluid filter cartridge comprising: an elongated perforated core member having a longitudinal axis; a final filtration medium being disposed about the periphery of said core member and being comprised of a pleated porous and fibrous material having the pleats thereof extending parallel to the longitudinal axis of said core member; and a primary filtration medium being disposed about the periphery of said final filtration member, said final filtration mEmber being comprised of an open-cell foamlike structure, said primary filtration medium has one surface thereof having a plurality of convolute configurations protruding therefrom which bear upon said final filtration medium.
Claim 3
Dependent Claim
21 words
The fluid filter cartridge as defined in claim 1 and wherein said primary filtration medium is comprised of a resinous foam.
Claim 4
Dependent Claim
22 words
The fluid filter cartridge as defined in claim 1 and wherein said primary filtration medium is comprised of a synthetic plastic foam.
Claim 5
Dependent Claim
21 words
The fluid filter cartridge as defined in claim 1 wherein said primary filtration medium is comprised of an open-cell polyurethane foam.
Claim 6
Dependent Claim
95 words
A fluid filter cartridge comprising: an elongated perforated core member having a longitudinal axis; a primary filter medium being disposed about the periphery of said core member and comprising an open-cell foamlike structure, said primary filtration medium has one surface thereof having a plurality of convolute configurations protruding therefrom which bear upon a final filtration medium; and a final filtration medium being disposed about the periphery of said primary filtration medium, said final filtration medium comprising a pleated, porous and fibrous material having the pleats thereof extending parallel to the longitudinal axis of said core.
Claim 7
Dependent Claim
95 words
A fluid filter cartridge comprising: an elongated perforated core member having a longitudinal axis; a primary filter medium being disposed about the periphery of said core member and comprising an open-cell foamlike structure, said primary filtration medium has one surface thereof having a plurality of convolute configurations protruding therefrom which bear upon a final filtration medium; and a final filtration medium being disposed about the periphery of said primary filtration medium, said final filtration medium comprising a pleated, porous and fibrous material having the pleats thereof extending parallel to the longitudinal axis of said core.
Claim 8
Dependent Claim
16 words
The fluid filter cartridge as defined in claim 5 wherein said primary filtration medium is compressed.
Claim 9
Dependent Claim
19 words
The filter device as defined in claim 5 wherein said primary filter medium is comprised of a resinous foam.
Claim 10
Dependent Claim
20 words
The filter device as defined in claim 5 wherein said primary filter medium is comprised of a synthetic plastic foam.
Claim 11
Dependent Claim
20 words
the fluid device as defined in claim 5 wherein said primary filter medium is comprised of an open-cell polyurethane foam.
Claim 12
Dependent Claim
125 words
A filter device comprising: an inner perforated tubular core, said inner core being substantially elongated along a center axis; a final filtration medium being formed of a fibrous material and having a plurality of accordion pleats therein, said final filtration medium being substantially cylindrically shaped and disposed about the periphery of said inner core, wherein the pleats of said final filtration medium being disposed substantially parallel to the center axis of said inner core; a primary filtration medium being formed of an open-cell, foamlike structure and being cylindrically shaped and disposed about the periphery of the said final medium; and said final filtration medium having a plurality of protrusions on one surface thereof which forms a springlike structure which bears upon said final filtration medium.
Claim 13
Dependent Claim
125 words
A filter device comprising: an inner perforated tubular core, said inner core being substantially elongated along a center axis; a final filtration medium being formed of a fibrous material and having a plurality of accordion pleats therein, said final filtration medium being substantially cylindrically shaped and disposed about the periphery of said inner core, wherein the pleats of said final filtration medium being disposed substantially parallel to the center axis of said inner core; a primary filtration medium being formed of an open-cell, foamlike structure and being cylindrically shaped and disposed about the periphery of the said final medium; and said final filtration medium having a plurality of protrusions on one surface thereof which forms a springlike structure which bears upon said final filtration medium.
Claim 14
Dependent Claim
26 words
The filter device as defined in claim 10 and further comprising a screen member being disposed between said final filtration medium and said primary filtration medium.
Claim 15
Dependent Claim
19 words
The filter device as defined in claim 10 wherein said primary filter medium is comprised of a resinous foam.
Claim 16
Dependent Claim
20 words
The filter device as defined in claim 10 wherein said primary filter medium is comprised of a synthetic plastic foam.
Claim 17
Dependent Claim
20 words
The filter medium as defined in claim 10 wherein said primary filter medium is formed of an open-cell polyurethane foam.
Claim 18
Dependent Claim
173 words
A filter device comprising: an inner perforated tubular core, said inner core being substantially elongated along a center axis; a primary filter medium being formed of a fibrous material and having a plurality of accordion pleats therein, said primary filter medium being substantially cylindrically shaped and disposed about the periphery of said inner core wherein the pleats of said final filter medium being positioned substantially parallel to the center axis of said inner core; a final filtration medium being formed of an open-cell, foamlike structure and being cylindrically shaped and disposed about the periphery of said primary medium, said final medium having a plurality of protrusions on one surface thereof which forms a springlike structure which bears upon said primary filter medium; an outer perforatEd tubular sleeve, said outer sleeve being disposed about the outer periphery of said final filter medium; and a pair of end members being disposed at either end of the filter device and attached to the inner core and said outer sleeve for substantially sealing said filter device therein.
Claim 19
Dependent Claim
173 words
A filter device comprising: an inner perforated tubular core, said inner core being substantially elongated along a center axis; a primary filter medium being formed of a fibrous material and having a plurality of accordion pleats therein, said primary filter medium being substantially cylindrically shaped and disposed about the periphery of said inner core wherein the pleats of said final filter medium being positioned substantially parallel to the center axis of said inner core; a final filtration medium being formed of an open-cell, foamlike structure and being cylindrically shaped and disposed about the periphery of said primary medium, said final medium having a plurality of protrusions on one surface thereof which forms a springlike structure which bears upon said primary filter medium; an outer perforatEd tubular sleeve, said outer sleeve being disposed about the outer periphery of said final filter medium; and a pair of end members being disposed at either end of the filter device and attached to the inner core and said outer sleeve for substantially sealing said filter device therein.
Claim 20
Dependent Claim
26 words
The filter device as defined in claim 15 and further comprising a screen member being disposed between the final filter medium and said primary filter medium.
Claim 21
Dependent Claim
19 words
The filter device as defined in claim 15 wherein said primary filter medium is comprised of a resinous foam.
Claim 22
Dependent Claim
19 words
The filter device as defined in claim 15 wherein said filter medium is comprised of a synthetic plastic foam.
Claim 23
Dependent Claim
20 words
The filter device as defined in claim 15 wherein said primary filter medium is comprised of an open-cell polyurethane foam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |