US3880757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering system
Assignee: Individual
•
Filing: 1973-04-16
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Granted: 1975-04-29
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Expires: 1993-04-16
Abstract
Abstract A filtering system for cooking vessels includes first and second stage filters and a pump therebetween. Hot cooking oil is continuously passed through a first stage filter wherein larger particles are removed, after which the oil is passed through a second stage filter wherein small particles are removed. The media in the second stage filter comprises thin, fibrous paper material presenting interlocking fibers between layers in a multilayer roll, with the hot cooking oil being pumped axially through such roll. Both the first and second stage filter media are contained within disposable cans easily exchanged but to which an oiltight connection is made.
Inventors
- 👤 Gary Thomason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:41
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/072; B01D29/073; B01D29/88; B01D29/90; B01D29/902; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
395 words
In a filtering system for cooking oil, means for providing a disposable and replaceable filter unit readily engageable in sealing connection with said filtering system, said means comprising: a manifold base adapted to receive said filtering unit in supporting relation and provided with separate connection means for supplying the entrance and exit of oil, said filtering unit comprising a cylindrical can having filtering media therein for filtering said oil by passage of said oil therethrough, said cylindrical can having a top and bottom joined to the cylindrical wall of said can, said top and said bottom are provided with substantially aligned apertures, said filtering media having a hollow core therethrough in alignment with said apertures, said core being a tube extending from the bottom to the top of said can, said tube having a plurality of openings therein constructed and arranged at the end of said tube adjacent the top of said can, the top of said filtering media being spaced from the underside of the top of the can to thereby define a space therebetween, an upstanding spindle joined to said manifold base and having a central passage communicating with one of said connection means in said manifold base, said spindle also having radial passage means communicating between said central passage and cooperating with said openings in said tube peripherally arranged around said spindle, said spindle being adapted to be received through said aligned apertures in said can, said radial passage means communicating radially outwardly through said openings in said tube into the said space defined by the underside of the top and the top of the filtering media, said can having one or more openings in the bottom outside said first of said aligned apertures for communicating with the other of said connection means in said manifold base, a substantially flat cover plate having an aperture therethrough, said spindle adapted and constructed to project upwardly through the aligned aperture in said top and through the aperture of said flat cover plate, knob means adapted and constructed to engage a portion of the spindle projecting through said flat cover plate, said knob means including means to draw said cover plate toward said spindle and said can whereby said cover plate forces downwardly said can to provide a sealing relation between the bottom of said can and the manifold base around said spindle and openings.
Claim 2
Dependent Claim
395 words
In a filtering system for cooking oil, means for providing a disposable and replaceable filter unit readily engageable in sealing connection with said filtering system, said means comprising: a manifold base adapted to receive said filtering unit in supporting relation and provided with separate connection means for supplying the entrance and exit of oil, said filtering unit comprising a cylindrical can having filtering media therein for filtering said oil by passage of said oil therethrough, said cylindrical can having a top and bottom joined to the cylindrical wall of said can, said top and said bottom are provided with substantially aligned apertures, said filtering media having a hollow core therethrough in alignment with said apertures, said core being a tube extending from the bottom to the top of said can, said tube having a plurality of openings therein constructed and arranged at the end of said tube adjacent the top of said can, the top of said filtering media being spaced from the underside of the top of the can to thereby define a space therebetween, an upstanding spindle joined to said manifold base and having a central passage communicating with one of said connection means in said manifold base, said spindle also having radial passage means communicating between said central passage and cooperating with said openings in said tube peripherally arranged around said spindle, said spindle being adapted to be received through said aligned apertures in said can, said radial passage means communicating radially outwardly through said openings in said tube into the said space defined by the underside of the top and the top of the filtering media, said can having one or more openings in the bottom outside said first of said aligned apertures for communicating with the other of said connection means in said manifold base, a substantially flat cover plate having an aperture therethrough, said spindle adapted and constructed to project upwardly through the aligned aperture in said top and through the aperture of said flat cover plate, knob means adapted and constructed to engage a portion of the spindle projecting through said flat cover plate, said knob means including means to draw said cover plate toward said spindle and said can whereby said cover plate forces downwardly said can to provide a sealing relation between the bottom of said can and the manifold base around said spindle and openings.
Claim 3
Dependent Claim
48 words
The apparatus according to claim 1 including sealing means for preventing escape of oil from said aligned apertures outside the area immediately surrounding said spindle, and for preventing escape of oil from said openings outside of the area of said can bottom as said can is forced downwardly.
Claim 4
Dependent Claim
43 words
The apparatus according to claim 1 including sealing means comprising O-ring seals surrounding said spindle on the top of said manifold base for engaging said bottom of said can, said other of said connection means communicating with said can between said O-ring seals.
Claim 5
Dependent Claim
39 words
The apparatus according to claim 3 wherein said manifold base is provided with a depression well between said O-ring seals communicating with said other of said connection means, said depression well extending around the top of said manifold base.
Claim 6
Dependent Claim
58 words
The apparatus according to claim 1 wherein the upper portion of said spindle is provided with a threaded extension positioned through the said aperture of said flat cover plate and wherein said knob means for drawing said cover plate toward said top of said can includes means for threadably engaging said extension and bearing against said cover plate.
Claim 7
Dependent Claim
41 words
The apparatus according to claim 1 wherein said cover plate is provided with a circular groove on the underside thereof for receiving the rim of said can, for centering said can and forcing said can downwardly along the cylindrical wall thereof.
Claim 8
Dependent Claim
42 words
The apparatus according to claim 6 wherein said manifold base is provided with a beveled wall for engaging the inside rim of the bottom of said can and cooperating in providing the centering of said can as said can is forced downwardly.
Claim 9
Dependent Claim
24 words
The apparatus according to claim 1 wherein said filtering media comprises a multilayer roll of thin, fibrous paper material presenting interlocking fibers between layers.
Claim 10
Dependent Claim
28 words
The apparatus according to claim 1 including further sealing means comprising an O-ring seal between an upper shoulder of said spindle and the top inside of said can.
Claim 11
Dependent Claim
48 words
The apparatus according to claim 1 including further sealing means comprising a first O-ring seal between the bottom of said cover plate and the top of said can, and a second O-ring seal between said means for drawing said cover plate toward said spindle and said cover plate.
Claim 12
Dependent Claim
38 words
The apparatus according to claim 1 wherein a portion of said can top is located between said spindle and said cover plate, with sealing means bearing against the top of said can proximate the top of said spindle.
Claim 13
Dependent Claim
364 words
In a filtering system for cooking oil, means for providing a disposable and replaceable filter unit readily engageable in sealing connection with said filtering system, said means comprising: a manifold base adapted to receive said filtering unit in supporting relation and provided with separate connection means for supplying the entrance and exit of oil, said filtering unit comprising a cylindrical can having filtering media therein for filtering said oil by passage of said oil therethrough, said cylindrical can having a top and bottom joined to the cylindrical wall of said can, wherein said top and said bottom are provided with substantially aligned apertures, an upstanding spindle joined to said manifold base and having a central passage communicating with one of said connection means in said manifold base, said spindle also having radial passage means communicating between said central passage and the surface of said spindle at one or more locations upwardly from said manifold base, said spindle being adapted to be received through said aligned apertures in said can, said radial passage means communicating radially outwardly into the filtering media in said can within the axial dimension of said can between said apertures in the top and bottom of said can with said can in position upon said manifold base, said can having another opening in the bottom of said can outside said first of said aligned apertures, said other of said connection means being provided with an upstanding tube extending through said other opening between said media and the side of said can, said media and said spindle being off-center with respect to the axis of said can, a substantially flat cover plate having an aperture therethrough, said spindle adapted and constructed to project upwardly through the aligned aperture in said top and through the aperture of said flat cover plate, knob means adapted and constructed to engage a portion of the spindle projecting through said flat cover plate, said knob means including means to draw said cover plate toward said spindle and said can whereby said cover plate forces downwardly said can to provide a sealing relation between the bottom of said can and the manifold base around said spindle and openings.
Claim 14
Dependent Claim
364 words
In a filtering system for cooking oil, means for providing a disposable and replaceable filter unit readily engageable in sealing connection with said filtering system, said means comprising: a manifold base adapted to receive said filtering unit in supporting relation and provided with separate connection means for supplying the entrance and exit of oil, said filtering unit comprising a cylindrical can having filtering media therein for filtering said oil by passage of said oil therethrough, said cylindrical can having a top and bottom joined to the cylindrical wall of said can, wherein said top and said bottom are provided with substantially aligned apertures, an upstanding spindle joined to said manifold base and having a central passage communicating with one of said connection means in said manifold base, said spindle also having radial passage means communicating between said central passage and the surface of said spindle at one or more locations upwardly from said manifold base, said spindle being adapted to be received through said aligned apertures in said can, said radial passage means communicating radially outwardly into the filtering media in said can within the axial dimension of said can between said apertures in the top and bottom of said can with said can in position upon said manifold base, said can having another opening in the bottom of said can outside said first of said aligned apertures, said other of said connection means being provided with an upstanding tube extending through said other opening between said media and the side of said can, said media and said spindle being off-center with respect to the axis of said can, a substantially flat cover plate having an aperture therethrough, said spindle adapted and constructed to project upwardly through the aligned aperture in said top and through the aperture of said flat cover plate, knob means adapted and constructed to engage a portion of the spindle projecting through said flat cover plate, said knob means including means to draw said cover plate toward said spindle and said can whereby said cover plate forces downwardly said can to provide a sealing relation between the bottom of said can and the manifold base around said spindle and openings.
Claim 15
Dependent Claim
98 words
The apparatus according to claim 12 wherein said media comprises cord characterized by a fibrous exterior, said cord being wound in an overlapping weave which becomes a tighter weave in a direction taken by said cooking oil in passing through said filter media, to provide a pluraliTy of pocket-like semi-enclosures for trapping particles from said cooking oil, said last mentioned media being wound on a perforate tube within said can and enclosing said spindle, said radial passage means in said spindle extending outwardly from said central passage for receiving oil from the last mentioned media through said perforations.
Claim 16
Dependent Claim
61 words
The apparatus according to claim 12, including a first O-ring seal on the top of said manifold base and around said spindle for bearing against the bottom of said can, and a second O-ring seal on the top of said manifold base around the first O-ring seal and around said upstanding tube for also bearing against the bottom of said can.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |