US4093548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter apparatus
Assignee: Oil Refining Systems of Florida Inc
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Filing: 1976-05-10
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Granted: 1978-06-06
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Expires: 1996-05-10
Abstract
Abstract A piston assembly is disposed between the inlet zone and the filter medium of an apparatus to forcibly compact the filter medium with the same liquid which is being filtered by the liquid filter apparatus thereby to inhibit channeling of the liquid through the filter medium.
Inventors
- 👤 Jon L. D. Sterkenburg
- 👤 George O. Kelbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:23
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D35/185; B01D24/00; B01D24/02; B01D24/04; B01D24/10; B01D24/16; B01D24/165
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
229 words
In a liquid filter apparatus having a housing with a side wall connecting between an upper portion and a bottom portion and with an inlet located in one of said portions and an outlet located in the other of said portions, a first rigid perforated plate fittingly disposed in said other end portion of said housing, a second rigid plate slidingly arranged in said one end portion of said housing, filter media for filtering fluid located in said housing between said plates, means for maintaining said first plate spaced from said outlet against the force of said filter media thereagainst, said second plate being disposed between said filter media and said inlet and having one face engaging said media and an opposite face facing said inlet and being constructed and arranged to sealingly slide along the interior surface of said side wall of said housing, said second plate having an aperture therethrough located spacedly inwardly of said side wall for the flow of fluid through said aperture to said filter media whereby, with channeling of said filter media and pressure drop within the interior of said filter media, fluid pressure on said opposite face of said second plate causes said second plate to slide in the direction toward said filter media to compress the filter media against said first plate and to close the channels causing such pressure drop.
Claim 2
Dependent Claim
229 words
In a liquid filter apparatus having a housing with a side wall connecting between an upper portion and a bottom portion and with an inlet located in one of said portions and an outlet located in the other of said portions, a first rigid perforated plate fittingly disposed in said other end portion of said housing, a second rigid plate slidingly arranged in said one end portion of said housing, filter media for filtering fluid located in said housing between said plates, means for maintaining said first plate spaced from said outlet against the force of said filter media thereagainst, said second plate being disposed between said filter media and said inlet and having one face engaging said media and an opposite face facing said inlet and being constructed and arranged to sealingly slide along the interior surface of said side wall of said housing, said second plate having an aperture therethrough located spacedly inwardly of said side wall for the flow of fluid through said aperture to said filter media whereby, with channeling of said filter media and pressure drop within the interior of said filter media, fluid pressure on said opposite face of said second plate causes said second plate to slide in the direction toward said filter media to compress the filter media against said first plate and to close the channels causing such pressure drop.
Claim 3
Dependent Claim
44 words
In the apparatus as defined in claim 1 further comprising sealing means being defined by an elastomeric disk attached to said second plate, said disk having an aperture therethrough generally aligned with said aperture in said second plate for the passage of fluid therethrough.
Claim 4
Dependent Claim
60 words
In the apparatus as defined in claim 1 further comprising a third rigid plate spaced away from said second plate, said sealing means being defined by an elastomeric disk positioned between said second and third plates and sandwiched therebetween, each of said disk and said third plate having passage means therethrough generally aligned with said aperture of said second plate.
Claim 5
Dependent Claim
21 words
In the apparatus as defined in claim 3 further comprising means for connecting said second and third plates to said disk.
Claim 6
Dependent Claim
36 words
In the apparatus as defined in claim 1 further comprising a foraminous member disposed beneath said filter media for dispersing the liquid after passing through said aperture generally throughout the bottom surface of said filter media.
Claim 7
Dependent Claim
18 words
In the apparatus as defined in claim 5 wherein said foraminous member is connected to said second plate.
Claim 8
Dependent Claim
62 words
In the apparatus as defined in claim 1 further comprising a third rigid plate spaced away from said second plate and having a passage means therethrough generally aligned with said aperture, a foraminous member disposed beneath said filter media for dispersing the fluid after passing through both of said passage means and aperture generally throughout the bottom surface of said filter media.
Claim 9
Dependent Claim
39 words
In the apparatus as defined in claim 7 further comprising sealing means defined by an elastomeric disk positioned between said second and third plates and having passage means in general alignment with both of said aperture and passage means.
Claim 10
Dependent Claim
33 words
In the apparatus as defined in claim 8 further comprising means for connecting said first and second and third plates, and said disk and foraminous member together thereby forming a unitary piston assembly.
Claim 11
Dependent Claim
17 words
In the apparatus as defined in claim 1 wherein said aperture is defined by a single passageway.
Claim 12
Dependent Claim
19 words
In the apparatus as defined in claim 1 wherein said aperture is defined by a plurality of spaced passageways.
Claim 13
Dependent Claim
32 words
In the apparatus as defined in claim 1 wherein said aperture diameter relative to the diameter of said second plate is between the ratio of 1 to 10 and 1 to 50.
Claim 14
Dependent Claim
78 words
In the apparatus as defined in claim 1 wherein said filter media is subject to channeling effects through the media and between said filter media and said housing, said second plate moving toward said first plate to compress and redistribute the filter media whenever increasing flow of fluid through said filter media occurs thereby resulting in a differential pressure increase across said second plate which forcibly drives said second plate to close the channels in said filter media.
Claim 15
Dependent Claim
47 words
In the apparatus as defined in claim 1 wherein said second plate is tightly fitted within said housing whereby said second plate will substantially remain in its position with respect to said filter media when fluid under pressure is substantially terminated from being introduced into said inlet.
Claim 16
Dependent Claim
27 words
In the apparatus of claim 1 wherein said first plate has perforations less restrictive to flow of fluid therethrough than said passageway means of said second plate.
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |