US3900403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration apparatus
Assignee: STEETLEY (MFG) Ltd
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Filing: 1974-03-25
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Granted: 1975-08-19
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Expires: 1994-03-25
Abstract
Abstract A filtration apparatus for separating liquid and solid components from mixtures thereof comprises a cylindrical housing accommodating therein a stationary hollow perforated cylindrical body fixedly secured thereto, an impermeable elastic sleeve disposed within the annular space defined by the inside of the housing and the outside of the cylindrical body thereby dividing the annular space into an inner filtration compartment and an outer pressure applying compartment, a filter element disposed around and supported by the cylindrical body, outlet means for the discharge of filtrate which has passed through the filter element into the cylindrical body, an inlet into the inner compartment for liquid/solid mixtures, an inlet into the outer compartment for a hydraulic fluid under pressure and a pivoted end plate constructed and arranged to permit discharge of filter cake from the inner compartment.
Inventors
- 👤 Raymond Thomas Randle
- 👤 John Williamson
- 👤 David Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:38
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/62; B01D29/66; B01D29/70; B01D29/72; B01D29/76; B01D29/80; B01D29/82; B01D29/822
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
202 words
A FILTRATION APPARATUS WHICH COMPRISES A CYLINDRICAL HOUSING ACCOMODATING THEREIN A STATIONARY, HOLLOW, PERFORATED, CYLINDRICAL BODY FIXEDLY SECURED THERETO AND THUS CREATING AN ANNULAR SPACE DEFINED BY THE INSIDE OF THE HOUSING AND THE OUTSIDE OF THE CYLINDRICAL BODY, AN IMPERMEABLE ELASTIC SLEEVE DISPOSED WITHIN SAID ANNULAR SPACE AND FIXED AS ITS OPPOSITE ENDS TO SAID HOUSING THEREBY DIVIDING THE ANNULAR SPACE INTO AN INNER FILTRATION COMPARTMENT AND AN OUTER PRESSURE APPLYING COMPARTMENT, A FILTER ELEMENT DISPOSED AROUND AND SUPPORTED BY THE CYLINDRICAL BODY, OUTLET MEANS CONNECTED WITH THE INTERIOR OF SAID CYLINDRICAL BODY FOR THE DISCHARGE OF FILTRATE WHICH HAS PASSED THROUGH THE FILTER ELEMENT INTO THE CYLINDRICAL BODY, AN INLET INTO THE INNER FILTRATION COMPARTMENT FOR LIQUID/SOLID MIXTURES, AN INLET INTO THE OUTER PRESSURE APPLYING COMPARTMENT FOR A HYDRAULIC FLUID UNDER PRESSURE, SAID HOUSING HAVING AN ANNULAR OPENING AT ITS LOWER END BELOW THE LOWER END OF SAID CYLINDRICAL BODY, MEANS FOR DISLODGING FILTER CAKE FROM SAID FILTER ELEMENT, AND A PIVOTED END PLATE HINGED TO SAID HOUSING FOR CLOSING SAID ANNULAR OPENING, SAID END PLATE, WHEN IN THE OPEN POSITION, CONSTRUCTED AND ARRANGED TO PERMIT DISCHARGE FROM THE INNER FILTRATION COMPARTMENT OF FILTER CAKE DISLODGED FROM SAID FILTER ELEMENT.
Claim 2
Dependent Claim
202 words
A FILTRATION APPARATUS WHICH COMPRISES A CYLINDRICAL HOUSING ACCOMODATING THEREIN A STATIONARY, HOLLOW, PERFORATED, CYLINDRICAL BODY FIXEDLY SECURED THERETO AND THUS CREATING AN ANNULAR SPACE DEFINED BY THE INSIDE OF THE HOUSING AND THE OUTSIDE OF THE CYLINDRICAL BODY, AN IMPERMEABLE ELASTIC SLEEVE DISPOSED WITHIN SAID ANNULAR SPACE AND FIXED AS ITS OPPOSITE ENDS TO SAID HOUSING THEREBY DIVIDING THE ANNULAR SPACE INTO AN INNER FILTRATION COMPARTMENT AND AN OUTER PRESSURE APPLYING COMPARTMENT, A FILTER ELEMENT DISPOSED AROUND AND SUPPORTED BY THE CYLINDRICAL BODY, OUTLET MEANS CONNECTED WITH THE INTERIOR OF SAID CYLINDRICAL BODY FOR THE DISCHARGE OF FILTRATE WHICH HAS PASSED THROUGH THE FILTER ELEMENT INTO THE CYLINDRICAL BODY, AN INLET INTO THE INNER FILTRATION COMPARTMENT FOR LIQUID/SOLID MIXTURES, AN INLET INTO THE OUTER PRESSURE APPLYING COMPARTMENT FOR A HYDRAULIC FLUID UNDER PRESSURE, SAID HOUSING HAVING AN ANNULAR OPENING AT ITS LOWER END BELOW THE LOWER END OF SAID CYLINDRICAL BODY, MEANS FOR DISLODGING FILTER CAKE FROM SAID FILTER ELEMENT, AND A PIVOTED END PLATE HINGED TO SAID HOUSING FOR CLOSING SAID ANNULAR OPENING, SAID END PLATE, WHEN IN THE OPEN POSITION, CONSTRUCTED AND ARRANGED TO PERMIT DISCHARGE FROM THE INNER FILTRATION COMPARTMENT OF FILTER CAKE DISLODGED FROM SAID FILTER ELEMENT.
Claim 3
Dependent Claim
21 words
An apparatus as claimed in claim 1 additionally comprising an inlet into the interior of the cylindrical body for compressed air.
Claim 4
Dependent Claim
66 words
An apparatus as claimed in claim 1 wherein the bottom of the housing overlaps the cylindrical body and the pivoted end plate is provided with a convex portion which is adapted, in the closed position of the plate, to seal against the body and against the overlapping housing and to provide a surface which between the seals substantially conforms to the surface of the elastic sleeve.
Claim 5
Dependent Claim
20 words
An apparatus as claimed in claim 1 wherein the cylindrical body incorporates means to vibrate the body during cake discharge.
Claim 6
Dependent Claim
23 words
An apparatus as claimed in claim 4 wherein the means to vibrate the cylindrical body during cake discharge is a torsional mode transducer.
Claim 7
Dependent Claim
25 words
An apparatus as claimed in claim 1 wherein the cylindrical body is tapered upwardly and outwardly from its lower end to assist in cake discharge.
Claim 8
Dependent Claim
103 words
An apparatus as claimed in claim 1 wherein the inlet into the inner filtration compartment for liquid/solid mixtures comprises a substantially cylindrical chamber provided with radially located apertures adapted to connect the interior of said chamber with the interior of said inner filtration compartment, said chamber being located at the upper end of, and rectilinear with, the cylindrical body, at least one inlet line for conducting liquid/solid mixture into said chamber, and a hollow cylindrical member disposed around the side wall of said chamber so constructed and arranged as to move rectilinearly with respect to said chamber to cover or expose said apertures.
Claim 9
Dependent Claim
29 words
An apparatus as claimed in claim 7 wherein the cylindrical member is provided with apertures which, in one position of the member, coincide with the apertures in the chamber.
Claim 10
Dependent Claim
56 words
An apparatus as claimed in claim 7 wherein the hollow cylindrical member is movable rectilinearly to a position disposed around the upper end of said filter element and is constructed and arranged as to engage filter cake adhering to the upper end of the filter element and thereby dislodge or displace any such adhering filter cake.
Claim 11
Dependent Claim
171 words
An apparatus as claimed in claim 1 wherein: i. the inlet into the inner filtration compartment for liquid/solid mixtures comprises a substantially cylindrical chamber provided with radially located apertures connected with the inner filtration compartment, said chamber being located at one end of, and rectilinear with, the cylindrical body, at least one inlet line for conducting liquid/slurry mixture into said chamber, and a hollow cylindrical member disposed around the side wall of said chamber and so constructed and arranged as to move rectilinearly to cover or expose said apertures, said member being provided with apertures, which, in one position of the member, coincide with the apertures in the chamber; and ii. the bottom wall of the housing overlaps the cylindrical body and the pivoted end plate is provided with a convex portion which is adapted, in the closed position of the plate, to seal against the body and against the overlapping housing and to provide a surface which between the seals substantially conforms to the adjacent surface of the elastic sleeve.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |