Patent US3715736A successfully refreshed from Google Patents.
Patent US3591004A successfully refreshed from Google Patents.
US3591004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel oil filter design
Assignee: Individual
•
Filing: 1968-07-12
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Granted: 1971-07-06
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Expires: 1988-07-12
Abstract
Abstract A form-sustaining disposable liquid fuel filter cartridge permanently confining a filter element has spaced apart noncoaxial ported resilient abutments on a flat wall of the cartridge housing facing in a common direction to provide a tripod mount for the cartridge and self-adjusting seals for the inlet and outlet passages provided by the ported abutments when the cartridge is mounted on its flat supporting base by a resilient sheet metal spring clamp exerting a biasing force offset from each of the abutments. The rectangular high capacity filter element within the cartridge is accordion pleated and longitudinally corrugated to bias the edges of the element against the walls of the cartridge to which the edges are bonded when the filter element is packed during assembly and to provide enlarged nonclogging entrance openings for the element. Filter elements may be placed in series in a single cartridge for dual filtering of the fuel and an automatically pierced initially sealed ported abutment used to keep contaminants out of the downstream side of the filter element before use.
Inventors
- 👤 Vernon D Roosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
98 words
A disposable form-sustaining liquid filter cartridge suited for installation on a supporting base comprising a closed housing and a liquid permeable filter element within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber, said housing having a base wall overlying the ends of said inlet chamber and said outlet chamber, said base wall providing abutment means having triangularly disposed bearing portions engageable with the supporting base and effecting lateral stability of Said cartridge thereon, said abutment means defining preformed ports to provide communication with said inlet chamber and said outlet chamber respectively.
Claim 2
Dependent Claim
98 words
A disposable form-sustaining liquid filter cartridge suited for installation on a supporting base comprising a closed housing and a liquid permeable filter element within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber, said housing having a base wall overlying the ends of said inlet chamber and said outlet chamber, said base wall providing abutment means having triangularly disposed bearing portions engageable with the supporting base and effecting lateral stability of Said cartridge thereon, said abutment means defining preformed ports to provide communication with said inlet chamber and said outlet chamber respectively.
Claim 3
Dependent Claim
17 words
A filter cartridge as recited in claim 1 wherein the abutment means forms seals surrounding the ports.
Claim 4
Dependent Claim
30 words
A filter cartridge as recited in claim 1 wherein the filter element comprises a manifold pleated longitudinally corrugated filter strip with the fold lines thereof extending transversely of the corrugations.
Claim 5
Dependent Claim
33 words
A filter cartridge as recited in claim 3 wherein alternate fold lines on the upstream side of the filter element are foreshortened to extend a different distance in the direction of liquid flow.
Claim 6
Dependent Claim
31 words
A filter cartridge as recited in claim 3 wherein the pleated filter element is compacted in the housing to bias the edges of the pleats against the sidewalls of the housing.
Claim 7
Dependent Claim
22 words
A filter cartridge as recited in claim 3 wherein the edges of the pleats are adhered to the sidewalls of the housing.
Claim 8
Dependent Claim
25 words
A filter cartridge as recited in claim 6 wherein the housing is transparent for the detection of leakage paths through the filter element in use.
Claim 9
Dependent Claim
25 words
A filter cartridge as recited in claim 1 wherein the filter element comprises a pair of serially disposed pleated sections defining an intermediate chamber therebetween.
Claim 10
Dependent Claim
47 words
A device as recited in claim 1 including a mating base for the filter cartridge and a spring clamping means exerting the biasing force in a common direction offset from said bearing portions to automatically align the filter cartridge in sealing engagement with the base during assembly.
Claim 11
Dependent Claim
27 words
A device as recited in claim 9 wherein the biasing spring spans the filter housing and is provided with the depending legs releasably engageable with the base.
Claim 12
Dependent Claim
25 words
A device as recited in claim 10 wherein the portion of the spring engaging the housing is bifurcated and concave when in its relaxed position.
Claim 13
Dependent Claim
181 words
A base-mounted generally rectangular liquid filter cartridge assembly comprising a transparent housing and a liquid permeable filter element confined within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber respectively disposed adjacent opposite sidewalls of the housing, the housing including a base wall spanning the sidewalls and overlying the ends of the inlet chamber and the outlet chamber, the base wall being ported inwardly of said sidewalls to provide ports for the inlet and outlet chambers, the housing further providing resilient seals about the periphery of the ports automatically sealing the ports upon rectilinear movement of the cartridge in mounting the same, the port communicating with the outlet chamber being liquid impervious prior to use, a mounting base provided with a punch to automatically pierce the seal of said port for said outlet chamber during assembly on the base, and a biasing spring spanning the filter housing and provided with depending legs releasably engageable with said base, the portion of said biasing spring engaging the housing being bifurcated and concave when in its relaxed position.
Claim 14
Dependent Claim
181 words
A base-mounted generally rectangular liquid filter cartridge assembly comprising a transparent housing and a liquid permeable filter element confined within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber respectively disposed adjacent opposite sidewalls of the housing, the housing including a base wall spanning the sidewalls and overlying the ends of the inlet chamber and the outlet chamber, the base wall being ported inwardly of said sidewalls to provide ports for the inlet and outlet chambers, the housing further providing resilient seals about the periphery of the ports automatically sealing the ports upon rectilinear movement of the cartridge in mounting the same, the port communicating with the outlet chamber being liquid impervious prior to use, a mounting base provided with a punch to automatically pierce the seal of said port for said outlet chamber during assembly on the base, and a biasing spring spanning the filter housing and provided with depending legs releasably engageable with said base, the portion of said biasing spring engaging the housing being bifurcated and concave when in its relaxed position.
Claim 15
Dependent Claim
110 words
A disposable form sustaining liquid filter cartridge suited for mounting on a supporting base comprising a closed housing and a liquid permeable filter element within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber, said housing comprising an outer wall and a base wall, sidewalls interposed between said outer and base walls, spaced preformed openings in said base wall, the first of said openings connecting with said inlet chamber and the second of said openings connecting with said outlet chamber, at least one of said first and second openings being offset from any axis of symmetry of said base wall to polarize said cartridge.
Claim 16
Dependent Claim
110 words
A disposable form sustaining liquid filter cartridge suited for mounting on a supporting base comprising a closed housing and a liquid permeable filter element within the housing and dividing the interior thereof into an inlet chamber and an outlet chamber, said housing comprising an outer wall and a base wall, sidewalls interposed between said outer and base walls, spaced preformed openings in said base wall, the first of said openings connecting with said inlet chamber and the second of said openings connecting with said outlet chamber, at least one of said first and second openings being offset from any axis of symmetry of said base wall to polarize said cartridge.
Claim 17
Dependent Claim
26 words
The filter cartridge of claim 13 wherein said inlet chamber and said outlet chamber are each adjacent said sidewalls on opposite sides of said filter element.
Claim 18
Dependent Claim
22 words
The filter cartridge of claim 13 wherein a third opening is provided in said bAse wall for communication with said inlet chamber.
Claim 19
Dependent Claim
25 words
A filter cartridge as defined in claim 1 wherein said inlet chamber and said outlet chamber are each disposed adjacent the sidewalls of said cartridge.
Claim 20
Dependent Claim
23 words
A filter cartridge as defined in claim 1 wherein said bearing portions are discontinuous and comprise resilient grommets projecting from said base wall.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |